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  • Amino Acid Sequence  (3,133)
  • Binding Sites  (1,751)
  • American Association for the Advancement of Science (AAAS)  (3,897)
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  • American Association for the Advancement of Science (AAAS)  (3,897)
  • Nature Publishing Group (NPG)  (492)
  • American Association of Petroleum Geologists (AAPG)
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  • 1
    Publication Date: 2016-01-23
    Description: Mono-ubiquitination of Fancd2 is essential for repairing DNA interstrand cross-links (ICLs), but the underlying mechanisms are unclear. The Fan1 nuclease, also required for ICL repair, is recruited to ICLs by ubiquitinated (Ub) Fancd2. This could in principle explain how Ub-Fancd2 promotes ICL repair, but we show that recruitment of Fan1 by Ub-Fancd2 is dispensable for ICL repair. Instead, Fan1 recruitment--and activity--restrains DNA replication fork progression and prevents chromosome abnormalities from occurring when DNA replication forks stall, even in the absence of ICLs. Accordingly, Fan1 nuclease-defective knockin mice are cancer-prone. Moreover, we show that a Fan1 variant in high-risk pancreatic cancers abolishes recruitment by Ub-Fancd2 and causes genetic instability without affecting ICL repair. Therefore, Fan1 recruitment enables processing of stalled forks that is essential for genome stability and health.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770513/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4770513/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lachaud, Christophe -- Moreno, Alberto -- Marchesi, Francesco -- Toth, Rachel -- Blow, J Julian -- Rouse, John -- WT096598MA/Wellcome Trust/United Kingdom -- Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2016 Feb 19;351(6275):846-9. doi: 10.1126/science.aad5634. Epub 2016 Jan 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, College of Life Sciences, Sir James Black Centre, University of Dundee, Dundee DD1 5EH, Scotland, UK. ; Centre for Gene Regulation and Expression, College of Life Sciences, Sir James Black Centre, University of Dundee, Dundee DD1 5EH, Scotland, UK. ; School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Bearsden Road, Glasgow G61 1QH, UK. ; Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, College of Life Sciences, Sir James Black Centre, University of Dundee, Dundee DD1 5EH, Scotland, UK. j.rouse@dundee.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26797144" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Chromosome Aberrations ; DNA Repair ; *DNA Replication ; Endodeoxyribonucleases/genetics/*metabolism ; Fanconi Anemia Complementation Group D2 Protein/genetics/*metabolism ; Female ; Gene Knock-In Techniques ; Genetic Predisposition to Disease ; Genomic Instability/*genetics ; Liver Neoplasms/genetics/pathology ; Lung Neoplasms/genetics/pathology ; Lymphoma/genetics/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Molecular Sequence Data ; Pancreatic Neoplasms/*genetics ; *Ubiquitination
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  • 2
    Publication Date: 2016-04-02
    Description: The recent rapid spread of Zika virus and its unexpected linkage to birth defects and an autoimmune neurological syndrome have generated worldwide concern. Zika virus is a flavivirus like the dengue, yellow fever, and West Nile viruses. We present the 3.8 angstrom resolution structure of mature Zika virus, determined by cryo-electron microscopy (cryo-EM). The structure of Zika virus is similar to other known flavivirus structures, except for the ~10 amino acids that surround the Asn(154) glycosylation site in each of the 180 envelope glycoproteins that make up the icosahedral shell. The carbohydrate moiety associated with this residue, which is recognizable in the cryo-EM electron density, may function as an attachment site of the virus to host cells. This region varies not only among Zika virus strains but also in other flaviviruses, which suggests that differences in this region may influence virus transmission and disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4845755/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4845755/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sirohi, Devika -- Chen, Zhenguo -- Sun, Lei -- Klose, Thomas -- Pierson, Theodore C -- Rossmann, Michael G -- Kuhn, Richard J -- R01 AI073755/AI/NIAID NIH HHS/ -- R01 AI076331/AI/NIAID NIH HHS/ -- R01AI073755/AI/NIAID NIH HHS/ -- R01AI076331/AI/NIAID NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2016 Apr 22;352(6284):467-70. doi: 10.1126/science.aaf5316. Epub 2016 Mar 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Markey Center for Structural Biology and Purdue Institute for Inflammation, Immunology and Infectious Disease, Purdue University, West Lafayette, IN 47907, USA. ; Viral Pathogenesis Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27033547" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cryoelectron Microscopy ; Glycosylation ; Humans ; Molecular Sequence Data ; Protein Structure, Tertiary ; Viral Envelope Proteins/chemistry/ultrastructure ; Viral Matrix Proteins/chemistry/ultrastructure ; Zika Virus/*chemistry/*ultrastructure
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  • 3
    Publication Date: 2016-04-16
    Description: The nuclear pore complex (NPC) controls the transport of macromolecules between the nucleus and cytoplasm, but its molecular architecture has thus far remained poorly defined. We biochemically reconstituted NPC core protomers and elucidated the underlying protein-protein interaction network. Flexible linker sequences, rather than interactions between the structured core scaffold nucleoporins, mediate the assembly of the inner ring complex and its attachment to the NPC coat. X-ray crystallographic analysis of these scaffold nucleoporins revealed the molecular details of their interactions with the flexible linker sequences and enabled construction of full-length atomic structures. By docking these structures into the cryoelectron tomographic reconstruction of the intact human NPC and validating their placement with our nucleoporin interactome, we built a composite structure of the NPC symmetric core that contains ~320,000 residues and accounts for ~56 megadaltons of the NPC's structured mass. Our approach provides a paradigm for the structure determination of similarly complex macromolecular assemblies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Daniel H -- Stuwe, Tobias -- Schilbach, Sandra -- Rundlet, Emily J -- Perriches, Thibaud -- Mobbs, George -- Fan, Yanbin -- Thierbach, Karsten -- Huber, Ferdinand M -- Collins, Leslie N -- Davenport, Andrew M -- Jeon, Young E -- Hoelz, Andre -- 5 T32 GM07616/GM/NIGMS NIH HHS/ -- ACB-12002/PHS HHS/ -- AGM-12006/PHS HHS/ -- R01 GM111461/GM/NIGMS NIH HHS/ -- R01-GM111461/GM/NIGMS NIH HHS/ -- T32 GM007616/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2016 Apr 15;352(6283):aaf1015. doi: 10.1126/science.aaf1015. Epub 2016 Apr 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA. ; Division of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA. hoelz@caltech.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27081075" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Amino Acid Sequence ; Cryoelectron Microscopy ; Crystallography, X-Ray ; Cytoplasm/metabolism ; Electron Microscope Tomography ; Fungal Proteins/chemistry/genetics/metabolism ; Humans ; Molecular Sequence Data ; Nuclear Pore/chemistry/*metabolism/*ultrastructure ; Nuclear Pore Complex Proteins/chemistry/genetics/*metabolism ; *Protein Interaction Maps ; Protein Structure, Tertiary ; Protein Subunits/chemistry/genetics/metabolism
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  • 4
    Publication Date: 2016-02-26
    Description: T cell-mediated destruction of insulin-producing beta cells in the pancreas causes type 1 diabetes (T1D). CD4 T cell responses play a central role in beta cell destruction, but the identity of the epitopes recognized by pathogenic CD4 T cells remains unknown. We found that diabetes-inducing CD4 T cell clones isolated from nonobese diabetic mice recognize epitopes formed by covalent cross-linking of proinsulin peptides to other peptides present in beta cell secretory granules. These hybrid insulin peptides (HIPs) are antigenic for CD4 T cells and can be detected by mass spectrometry in beta cells. CD4 T cells from the residual pancreatic islets of two organ donors who had T1D also recognize HIPs. Autoreactive T cells targeting hybrid peptides may explain how immune tolerance is broken in T1D.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Delong, Thomas -- Wiles, Timothy A -- Baker, Rocky L -- Bradley, Brenda -- Barbour, Gene -- Reisdorph, Richard -- Armstrong, Michael -- Powell, Roger L -- Reisdorph, Nichole -- Kumar, Nitesh -- Elso, Colleen M -- DeNicola, Megan -- Bottino, Rita -- Powers, Alvin C -- Harlan, David M -- Kent, Sally C -- Mannering, Stuart I -- Haskins, Kathryn -- 1K01DK094941/DK/NIDDK NIH HHS/ -- 1R01DK081166/DK/NIDDK NIH HHS/ -- 5U01DK89572/DK/NIDDK NIH HHS/ -- DK104211/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2016 Feb 12;351(6274):711-4. doi: 10.1126/science.aad2791.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Microbiology, University of Colorado School of Medicine, Denver, Anschutz Medical Campus, Aurora, CO 80045, USA. thomas.delong@ucdenver.edu katie.haskins@ucdenver.edu. ; Department of Immunology and Microbiology, University of Colorado School of Medicine, Denver, Anschutz Medical Campus, Aurora, CO 80045, USA. ; Pharmaceutical Sciences, University of Colorado School of Medicine, Aurora, CO 80045, USA. ; Immunology and Diabetes Unit, St. Vincent's Institute of Medical Research, 9 Princes Street, Fitzroy, Victoria 3065, Australia. ; Department of Medicine, Diabetes Division, Diabetes Center of Excellence, University of Massachusetts Medical School, Worcester, MA, USA. ; Institute of Cellular Therapeutics, Allegheny-Singer Research Institute, Allegheny Health Network, Pittsburgh, PA, USA. ; Division of Diabetes, Endocrinology, and Metabolism, Department of Medicine, and Department of Molecular Physiology and Biophysics, Vanderbilt University Medical Center, Nashville, TN, USA. VA Tennessee Valley Healthcare System, Nashville, TN, USA. ; Immunology and Diabetes Unit, St. Vincent's Institute of Medical Research, 9 Princes Street, Fitzroy, Victoria 3065, Australia. University of Melbourne, Department of Medicine, St. Vincent's Hospital, Fitzroy, Victoria 3065, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26912858" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; C-Peptide/chemistry/*immunology ; CD4-Positive T-Lymphocytes/*immunology ; Clone Cells ; Diabetes Mellitus, Experimental/*immunology/pathology ; Diabetes Mellitus, Type 1/*immunology/pathology ; Epitopes/*immunology ; Immune Tolerance ; Insulin-Secreting Cells/*immunology/pathology ; Mice ; Mice, Inbred NOD ; Molecular Sequence Data ; Peptides/chemistry/immunology
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  • 5
    Publication Date: 2016-02-26
    Description: With functions that range from cell envelope structure to signal transduction and transport, lipoproteins constitute 2 to 3% of bacterial genomes and play critical roles in bacterial physiology, pathogenicity, and antibiotic resistance. Lipoproteins are synthesized with a signal peptide securing them to the cytoplasmic membrane with the lipoprotein domain in the periplasm or outside the cell. Posttranslational processing requires a signal peptidase II (LspA) that removes the signal peptide. Here, we report the crystal structure of LspA from Pseudomonas aeruginosa complexed with the antimicrobial globomycin at 2.8 angstrom resolution. Mutagenesis studies identify LspA as an aspartyl peptidase. In an example of molecular mimicry, globomycin appears to inhibit by acting as a noncleavable peptide that sterically blocks the active site. This structure should inform rational antibiotic drug discovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vogeley, Lutz -- El Arnaout, Toufic -- Bailey, Jonathan -- Stansfeld, Phillip J -- Boland, Coilin -- Caffrey, Martin -- BB/I019855/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2016 Feb 19;351(6275):876-80. doi: 10.1126/science.aad3747.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland. ; Department of Biochemistry, University of Oxford, South Parks Road, Oxford, UK. ; School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland. martin.caffrey@tcd.ie.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26912896" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Anti-Bacterial Agents/*chemistry/pharmacology ; Aspartic Acid Endopeptidases/*antagonists & inhibitors/*chemistry/genetics ; Bacterial Proteins/*antagonists & inhibitors/*chemistry/genetics ; Catalytic Domain ; Conserved Sequence ; Crystallography, X-Ray ; Mutagenesis ; Peptides/*chemistry/pharmacology ; Protein Conformation ; Protein Processing, Post-Translational ; Pseudomonas aeruginosa/*enzymology ; Substrate Specificity
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  • 6
    Publication Date: 2016-03-12
    Description: Poly(ethylene terephthalate) (PET) is used extensively worldwide in plastic products, and its accumulation in the environment has become a global concern. Because the ability to enzymatically degrade PET has been thought to be limited to a few fungal species, biodegradation is not yet a viable remediation or recycling strategy. By screening natural microbial communities exposed to PET in the environment, we isolated a novel bacterium, Ideonella sakaiensis 201-F6, that is able to use PET as its major energy and carbon source. When grown on PET, this strain produces two enzymes capable of hydrolyzing PET and the reaction intermediate, mono(2-hydroxyethyl) terephthalic acid. Both enzymes are required to enzymatically convert PET efficiently into its two environmentally benign monomers, terephthalic acid and ethylene glycol.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoshida, Shosuke -- Hiraga, Kazumi -- Takehana, Toshihiko -- Taniguchi, Ikuo -- Yamaji, Hironao -- Maeda, Yasuhito -- Toyohara, Kiyotsuna -- Miyamoto, Kenji -- Kimura, Yoshiharu -- Oda, Kohei -- New York, N.Y. -- Science. 2016 Mar 11;351(6278):1196-9. doi: 10.1126/science.aad6359.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Applied Biology, Faculty of Textile Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. Department of Biosciences and Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan. ; Department of Applied Biology, Faculty of Textile Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. ; Life Science Materials Laboratory, ADEKA, 7-2-34 Higashiogu, Arakawa-ku, Tokyo 116-8553, Japan. ; Department of Polymer Science, Faculty of Textile Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. ; Ecology-Related Material Group Innovation Research Institute, Teijin, Hinode-cho 2-1, Iwakuni, Yamaguchi 740-8511, Japan. ; Department of Biosciences and Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26965627" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Betaproteobacteria/*enzymology ; Environmental Restoration and Remediation ; Enzymes/classification/genetics/metabolism ; Hydrolysis ; Microbial Consortia ; Molecular Sequence Data ; Phthalic Acids/metabolism ; Phylogeny ; Plastics/*metabolism ; Polyethylene Terephthalates/*metabolism ; Recycling
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  • 7
    Publication Date: 2016-03-26
    Description: Sequencing of exomes and genomes has revealed abundant genetic variation affecting the coding sequences of human transcription factors (TFs), but the consequences of such variation remain largely unexplored. We developed a computational, structure-based approach to evaluate TF variants for their impact on DNA binding activity and used universal protein-binding microarrays to assay sequence-specific DNA binding activity across 41 reference and 117 variant alleles found in individuals of diverse ancestries and families with Mendelian diseases. We found 77 variants in 28 genes that affect DNA binding affinity or specificity and identified thousands of rare alleles likely to alter the DNA binding activity of human sequence-specific TFs. Our results suggest that most individuals have unique repertoires of TF DNA binding activities, which may contribute to phenotypic variation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4825693/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4825693/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Barrera, Luis A -- Vedenko, Anastasia -- Kurland, Jesse V -- Rogers, Julia M -- Gisselbrecht, Stephen S -- Rossin, Elizabeth J -- Woodard, Jaie -- Mariani, Luca -- Kock, Kian Hong -- Inukai, Sachi -- Siggers, Trevor -- Shokri, Leila -- Gordan, Raluca -- Sahni, Nidhi -- Cotsapas, Chris -- Hao, Tong -- Yi, Song -- Kellis, Manolis -- Daly, Mark J -- Vidal, Marc -- Hill, David E -- Bulyk, Martha L -- P50 HG004233/HG/NHGRI NIH HHS/ -- R01 HG003985/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2016 Mar 25;351(6280):1450-4. doi: 10.1126/science.aad2257. Epub 2016 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Committee on Higher Degrees in Biophysics, Harvard University, Cambridge, MA 02138, USA. Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA. Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Committee on Higher Degrees in Biophysics, Harvard University, Cambridge, MA 02138, USA. ; Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA. Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Program in Biological and Biomedical Sciences, Harvard University, Cambridge, MA 02138, USA. ; Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA 02215, USA. Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA. Department of Genetics, Harvard Medical School, Boston, MA 02115, USA. ; Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. ; Computer Science and Artificial Intelligence Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. ; Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. Center for Human Genetics Research and Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA 02114, USA. ; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Committee on Higher Degrees in Biophysics, Harvard University, Cambridge, MA 02138, USA. Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA. Broad Institute of Harvard and MIT, Cambridge, MA 02139, USA. Program in Biological and Biomedical Sciences, Harvard University, Cambridge, MA 02138, USA. Center for Cancer Systems Biology (CCSB), Dana-Farber Cancer Institute, Boston, MA 02215, USA. Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27013732" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Computer Simulation ; DNA/*metabolism ; DNA-Binding Proteins/*genetics/metabolism ; Exome/genetics ; *Gene Expression Regulation ; Genetic Diseases, Inborn/*genetics ; Genetic Variation ; Genome, Human ; Humans ; Mutation ; Polymorphism, Single Nucleotide ; Protein Array Analysis ; Protein Binding ; Sequence Analysis, DNA ; Transcription Factors/*genetics/metabolism
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  • 8
    Publication Date: 2016-01-30
    Description: p97 is a hexameric AAA+ adenosine triphosphatase (ATPase) that is an attractive target for cancer drug development. We report cryo-electron microscopy (cryo-EM) structures for adenosine diphosphate (ADP)-bound, full-length, hexameric wild-type p97 in the presence and absence of an allosteric inhibitor at resolutions of 2.3 and 2.4 angstroms, respectively. We also report cryo-EM structures (at resolutions of ~3.3, 3.2, and 3.3 angstroms, respectively) for three distinct, coexisting functional states of p97 with occupancies of zero, one, or two molecules of adenosine 5'-O-(3-thiotriphosphate) (ATPgammaS) per protomer. A large corkscrew-like change in molecular architecture, coupled with upward displacement of the N-terminal domain, is observed only when ATPgammaS is bound to both the D1 and D2 domains of the protomer. These cryo-EM structures establish the sequence of nucleotide-driven structural changes in p97 at atomic resolution. They also enable elucidation of the binding mode of an allosteric small-molecule inhibitor to p97 and illustrate how inhibitor binding at the interface between the D1 and D2 domains prevents propagation of the conformational changes necessary for p97 function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Banerjee, Soojay -- Bartesaghi, Alberto -- Merk, Alan -- Rao, Prashant -- Bulfer, Stacie L -- Yan, Yongzhao -- Green, Neal -- Mroczkowski, Barbara -- Neitz, R Jeffrey -- Wipf, Peter -- Falconieri, Veronica -- Deshaies, Raymond J -- Milne, Jacqueline L S -- Huryn, Donna -- Arkin, Michelle -- Subramaniam, Sriram -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Feb 19;351(6275):871-5. doi: 10.1126/science.aad7974. Epub 2016 Jan 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cell Biology, National Cancer Institute, Bethesda, MD 20892, USA. ; Small Molecule Discovery Center, Pharmaceutical Chemistry, School of Pharmacy, University of California, San Francisco, CA 94143, USA. ; University of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, PA 15260, USA. ; Leidos Biomedical Research Inc., Frederick, MD 21702, USA. ; Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, MD 20892, USA. ; Division of Biology and Biological Engineering and Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA 91107, USA. ; Laboratory of Cell Biology, National Cancer Institute, Bethesda, MD 20892, USA. ss1@nih.gov.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26822609" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Diphosphate/chemistry ; Adenosine Triphosphatases/*antagonists & inhibitors/*chemistry ; Adenosine Triphosphate/analogs & derivatives/chemistry ; Allosteric Regulation ; Binding Sites ; Cryoelectron Microscopy ; Enzyme Inhibitors ; Humans ; Models, Molecular ; Nuclear Proteins/*antagonists & inhibitors/*chemistry ; Protein Structure, Tertiary
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  • 9
    Publication Date: 2016-02-06
    Description: SH3 and multiple ankyrin repeat domains 3 (SHANK3) haploinsufficiency is causative for the neurological features of Phelan-McDermid syndrome (PMDS), including a high risk of autism spectrum disorder (ASD). We used unbiased, quantitative proteomics to identify changes in the phosphoproteome of Shank3-deficient neurons. Down-regulation of protein kinase B (PKB/Akt)-mammalian target of rapamycin complex 1 (mTORC1) signaling resulted from enhanced phosphorylation and activation of serine/threonine protein phosphatase 2A (PP2A) regulatory subunit, B56beta, due to increased steady-state levels of its kinase, Cdc2-like kinase 2 (CLK2). Pharmacological and genetic activation of Akt or inhibition of CLK2 relieved synaptic deficits in Shank3-deficient and PMDS patient-derived neurons. CLK2 inhibition also restored normal sociability in a Shank3-deficient mouse model. Our study thereby provides a novel mechanistic and potentially therapeutic understanding of deregulated signaling downstream of Shank3 deficiency.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bidinosti, Michael -- Botta, Paolo -- Kruttner, Sebastian -- Proenca, Catia C -- Stoehr, Natacha -- Bernhard, Mario -- Fruh, Isabelle -- Mueller, Matthias -- Bonenfant, Debora -- Voshol, Hans -- Carbone, Walter -- Neal, Sarah J -- McTighe, Stephanie M -- Roma, Guglielmo -- Dolmetsch, Ricardo E -- Porter, Jeffrey A -- Caroni, Pico -- Bouwmeester, Tewis -- Luthi, Andreas -- Galimberti, Ivan -- New York, N.Y. -- Science. 2016 Mar 11;351(6278):1199-203. doi: 10.1126/science.aad5487. Epub 2016 Feb 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Developmental Molecular Pathways, Novartis Institutes for Biomedical Research, Basel, Switzerland. ; Friedrich Miescher Institute, Basel, Switzerland. ; Analytical Sciences and Imaging, Novartis Institutes for Biomedical Research, Basel, Switzerland. ; Neuroscience, Novartis Institutes for Biomedical Research, Cambridge, USA. ; Developmental Molecular Pathways, Novartis Institutes for Biomedical Research, Basel, Switzerland. ivan.galimberti@novartis.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26847545" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Autism Spectrum Disorder/*drug therapy/enzymology/genetics ; Chromosome Deletion ; Chromosome Disorders/genetics ; Chromosomes, Human, Pair 22/genetics ; Disease Models, Animal ; Down-Regulation ; Gene Knockdown Techniques ; Humans ; Insulin-Like Growth Factor I/metabolism ; Mice ; Molecular Sequence Data ; Multiprotein Complexes/metabolism ; Nerve Tissue Proteins/*genetics ; Neurons/enzymology ; Phosphorylation ; Protein Phosphatase 2/metabolism ; Protein-Serine-Threonine Kinases/*antagonists & inhibitors/metabolism ; Protein-Tyrosine Kinases/*antagonists & inhibitors/metabolism ; Proteomics ; Proto-Oncogene Proteins c-akt/genetics/metabolism ; Rats ; Signal Transduction ; TOR Serine-Threonine Kinases/metabolism
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    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2016-03-26
    Description: Induction of broadly neutralizing antibodies (bnAbs) is a major HIV vaccine goal. Germline-targeting immunogens aim to initiate bnAb induction by activating bnAb germline precursor B cells. Critical unmet challenges are to determine whether bnAb precursor naive B cells bind germline-targeting immunogens and occur at sufficient frequency in humans for reliable vaccine responses. Using deep mutational scanning and multitarget optimization, we developed a germline-targeting immunogen (eOD-GT8) for diverse VRC01-class bnAbs. We then used the immunogen to isolate VRC01-class precursor naive B cells from HIV-uninfected donors. Frequencies of true VRC01-class precursors, their structures, and their eOD-GT8 affinities support this immunogen as a candidate human vaccine prime. These methods could be applied to germline targeting for other classes of HIV bnAbs and for Abs to other pathogens.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872700/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4872700/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jardine, Joseph G -- Kulp, Daniel W -- Havenar-Daughton, Colin -- Sarkar, Anita -- Briney, Bryan -- Sok, Devin -- Sesterhenn, Fabian -- Ereno-Orbea, June -- Kalyuzhniy, Oleksandr -- Deresa, Isaiah -- Hu, Xiaozhen -- Spencer, Skye -- Jones, Meaghan -- Georgeson, Erik -- Adachi, Yumiko -- Kubitz, Michael -- deCamp, Allan C -- Julien, Jean-Philippe -- Wilson, Ian A -- Burton, Dennis R -- Crotty, Shane -- Schief, William R -- P01 AI094419/AI/NIAID NIH HHS/ -- P01 AI110657/AI/NIAID NIH HHS/ -- P41GM103393/GM/NIGMS NIH HHS/ -- R01 AI084817/AI/NIAID NIH HHS/ -- UM1 AI100663/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Mar 25;351(6280):1458-63. doi: 10.1126/science.aad9195.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. ; IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Program in Molecular Structure and Function, Hospital for Sick Children Research Institute, Toronto, Ontario M5G 0A4, Canada. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Vaccine and Infectious Disease Division, Statistical Center for HIV/AIDS Research and Prevention (SCHARP), Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA. ; IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Program in Molecular Structure and Function, Hospital for Sick Children Research Institute, Toronto, Ontario M5G 0A4, Canada. Departments of Biochemistry and Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02129, USA. ; Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA 92037, USA. Division of Infectious Diseases, Department of Medicine, University of California San Diego School of Medicine, La Jolla, CA, USA. schief@scripps.edu shane@lji.org. ; Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA. IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery, The Scripps Research Institute, La Jolla, CA 92037, USA. Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA 02129, USA. schief@scripps.edu shane@lji.org.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27013733" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines/*immunology ; Amino Acid Sequence ; Antibodies, Monoclonal/chemistry/*immunology/isolation & purification ; Antibodies, Neutralizing/chemistry/*immunology/isolation & purification ; Antibody Affinity ; B-Lymphocytes/immunology ; Cell Separation ; Combinatorial Chemistry Techniques ; Epitopes, B-Lymphocyte/chemistry/genetics/*immunology ; Germ Cells/*immunology ; HIV Antibodies/chemistry/*immunology/isolation & purification ; HIV-1/*immunology ; Humans ; Molecular Sequence Data ; Mutation ; Peptide Library ; Precursor Cells, B-Lymphoid/*immunology ; Protein Conformation
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  • 11
    Publication Date: 2016-02-24
    Description: Eukaryotic cells restrict protein synthesis under various stress conditions, by inhibiting the eukaryotic translation initiation factor 2B (eIF2B). eIF2B is the guanine nucleotide exchange factor for eIF2, a heterotrimeric G protein consisting of alpha-, beta- and gamma-subunits. eIF2B exchanges GDP for GTP on the gamma-subunit of eIF2 (eIF2gamma), and is inhibited by stress-induced phosphorylation of eIF2alpha. eIF2B is a heterodecameric complex of two copies each of the alpha-, beta-, gamma-, delta- and epsilon-subunits; its alpha-, beta- and delta-subunits constitute the regulatory subcomplex, while the gamma- and epsilon-subunits form the catalytic subcomplex. The three-dimensional structure of the entire eIF2B complex has not been determined. Here we present the crystal structure of Schizosaccharomyces pombe eIF2B with an unprecedented subunit arrangement, in which the alpha2beta2delta2 hexameric regulatory subcomplex binds two gammaepsilon dimeric catalytic subcomplexes on its opposite sides. A structure-based in vitro analysis by a surface-scanning site-directed photo-cross-linking method identified the eIF2alpha-binding and eIF2gamma-binding interfaces, located far apart on the regulatory and catalytic subcomplexes, respectively. The eIF2gamma-binding interface is located close to the conserved 'NF motif', which is important for nucleotide exchange. A structural model was constructed for the complex of eIF2B with phosphorylated eIF2alpha, which binds to eIF2B more strongly than the unphosphorylated form. These results indicate that the eIF2alpha phosphorylation generates the 'nonproductive' eIF2-eIF2B complex, which prevents nucleotide exchange on eIF2gamma, and thus provide a structural framework for the eIF2B-mediated mechanism of stress-induced translational control.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kashiwagi, Kazuhiro -- Takahashi, Mari -- Nishimoto, Madoka -- Hiyama, Takuya B -- Higo, Toshiaki -- Umehara, Takashi -- Sakamoto, Kensaku -- Ito, Takuhiro -- Yokoyama, Shigeyuki -- England -- Nature. 2016 Mar 3;531(7592):122-5. doi: 10.1038/nature16991. Epub 2016 Feb 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan. ; RIKEN Systems and Structural Biology Center, Tsurumi-ku, Yokohama 230-0045, Japan. ; RIKEN Center for Life Science Technologies, Tsurumi-ku, Yokohama 230-0045, Japan. ; RIKEN Structural Biology Laboratory, Tsurumi-ku, Yokohama 230-0045, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26901872" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Binding Sites ; Biocatalysis ; Cross-Linking Reagents/chemistry ; Crystallography, X-Ray ; Eukaryotic Initiation Factor-2B/*chemistry/metabolism ; Guanosine Diphosphate/metabolism ; Guanosine Triphosphate/metabolism ; Models, Molecular ; Phosphorylation ; Protein Binding ; Protein Biosynthesis ; Protein Structure, Quaternary ; Protein Subunits/chemistry/metabolism ; Schizosaccharomyces/*chemistry
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  • 12
    Publication Date: 2016-01-15
    Description: Nonribosomal peptide synthetases (NRPSs) are very large proteins that produce small peptide molecules with wide-ranging biological activities, including environmentally friendly chemicals and many widely used therapeutics. NRPSs are macromolecular machines, with modular assembly-line logic, a complex catalytic cycle, moving parts and many active sites. In addition to the core domains required to link the substrates, they often include specialized tailoring domains, which introduce chemical modifications and allow the product to access a large expanse of chemical space. It is still unknown how the NRPS tailoring domains are structurally accommodated into megaenzymes or how they have adapted to function in nonribosomal peptide synthesis. Here we present a series of crystal structures of the initiation module of an antibiotic-producing NRPS, linear gramicidin synthetase. This module includes the specialized tailoring formylation domain, and states are captured that represent every major step of the assembly-line synthesis in the initiation module. The transitions between conformations are large in scale, with both the peptidyl carrier protein domain and the adenylation subdomain undergoing huge movements to transport substrate between distal active sites. The structures highlight the great versatility of NRPSs, as small domains repurpose and recycle their limited interfaces to interact with their various binding partners. Understanding tailoring domains is important if NRPSs are to be utilized in the production of novel therapeutics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reimer, Janice M -- Aloise, Martin N -- Harrison, Paul M -- Schmeing, T Martin -- 106615/Canadian Institutes of Health Research/Canada -- England -- Nature. 2016 Jan 14;529(7585):239-42. doi: 10.1038/nature16503.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, McGill University, 3649 Promenade Sir-William-Osler, Montreal, Quebec H3G 0B1, Canada. ; Department of Biology, McGill University, 1205 Dr Penfield Avenue, Montreal, Quebec H3A 1B1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26762462" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Isomerases/chemistry/metabolism ; Anti-Bacterial Agents/biosynthesis ; Binding Sites ; *Biocatalysis ; Brevibacillus/*enzymology ; Carbohydrate Metabolism ; Carrier Proteins/chemistry/metabolism ; Catalytic Domain ; Coenzymes/metabolism ; Crystallography, X-Ray ; Gramicidin/*biosynthesis ; Hydroxymethyl and Formyl Transferases/chemistry/metabolism ; Models, Molecular ; Multienzyme Complexes/chemistry/metabolism ; Pantetheine/analogs & derivatives/metabolism ; Peptide Synthases/*chemistry/*metabolism ; Protein Binding ; Protein Structure, Tertiary ; RNA, Transfer/chemistry/metabolism
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  • 13
    Publication Date: 2016-02-09
    Description: The tremendous pandemic potential of coronaviruses was demonstrated twice in the past few decades by two global outbreaks of deadly pneumonia. Entry of coronaviruses into cells is mediated by the transmembrane spike glycoprotein S, which forms a trimer carrying receptor-binding and membrane fusion functions. S also contains the principal antigenic determinants and is the target of neutralizing antibodies. Here we present the structure of a mouse coronavirus S trimer ectodomain determined at 4.0 A resolution by single particle cryo-electron microscopy. It reveals the metastable pre-fusion architecture of S and highlights key interactions stabilizing it. The structure shares a common core with paramyxovirus F proteins, implicating mechanistic similarities and an evolutionary connection between these viral fusion proteins. The accessibility of the highly conserved fusion peptide at the periphery of the trimer indicates potential vaccinology strategies to elicit broadly neutralizing antibodies against coronaviruses. Finally, comparison with crystal structures of human coronavirus S domains allows rationalization of the molecular basis for species specificity based on the use of spatially contiguous but distinct domains.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walls, Alexandra C -- Tortorici, M Alejandra -- Bosch, Berend-Jan -- Frenz, Brandon -- Rottier, Peter J M -- DiMaio, Frank -- Rey, Felix A -- Veesler, David -- GM103310/GM/NIGMS NIH HHS/ -- T32GM008268/GM/NIGMS NIH HHS/ -- England -- Nature. 2016 Mar 3;531(7592):114-7. doi: 10.1038/nature16988. Epub 2016 Feb 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle, Washington 98195, USA. ; Institut Pasteur, Unite de Virologie Structurale, 75015 Paris, France. ; CNRS UMR 3569 Virologie, 75015 Paris, France. ; Virology Division, Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, The Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26855426" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Antibodies, Neutralizing/immunology ; Cell Line ; Coronavirus Infections/immunology/virology ; *Cryoelectron Microscopy ; Drosophila melanogaster ; Mice ; Models, Molecular ; Molecular Sequence Data ; Murine hepatitis virus/*chemistry/immunology/*ultrastructure ; Protein Multimerization ; Protein Structure, Tertiary ; Spike Glycoprotein, Coronavirus/*chemistry/immunology/*ultrastructure ; Viral Vaccines/chemistry/immunology ; Virus Internalization
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  • 14
    Publication Date: 2016-04-15
    Description: Somatic mutations are the driving force of cancer genome evolution. The rate of somatic mutations appears to be greatly variable across the genome due to variations in chromatin organization, DNA accessibility and replication timing. However, other variables that may influence the mutation rate locally are unknown, such as a role for DNA-binding proteins, for example. Here we demonstrate that the rate of somatic mutations in melanomas is highly increased at active transcription factor binding sites and nucleosome embedded DNA, compared to their flanking regions. Using recently available excision-repair sequencing (XR-seq) data, we show that the higher mutation rate at these sites is caused by a decrease of the levels of nucleotide excision repair (NER) activity. Our work demonstrates that DNA-bound proteins interfere with the NER machinery, which results in an increased rate of DNA mutations at the protein binding sites. This finding has important implications for our understanding of mutational and DNA repair processes and in the identification of cancer driver mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sabarinathan, Radhakrishnan -- Mularoni, Loris -- Deu-Pons, Jordi -- Gonzalez-Perez, Abel -- Lopez-Bigas, Nuria -- England -- Nature. 2016 Apr 14;532(7598):264-7. doi: 10.1038/nature17661.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Program on Biomedical Informatics, IMIM Hospital del Mar Medical Research Institute and Universitat Pompeu Fabra, Doctor Aiguader 88, 08003 Barcelona, Spain. ; Institucio Catalana de Recerca i Estudis Avancats (ICREA), Passeig Lluis Companys 23, 08010 Barcelona, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27075101" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; DNA/*genetics/*metabolism ; *DNA Repair ; DNA, Neoplasm/genetics/metabolism ; DNA-Binding Proteins/*metabolism ; Gene Expression Regulation, Neoplastic/genetics ; Genome, Human/genetics ; Humans ; Lung Neoplasms/genetics ; Melanoma/*genetics ; Mutagenesis/*genetics ; *Mutation Rate ; Nucleosomes/genetics/metabolism ; Promoter Regions, Genetic/genetics ; Protein Binding ; Transcription Factors/*metabolism
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  • 15
    Publication Date: 2016-03-05
    Description: The most recent Ebola virus outbreak in West Africa, which was unprecedented in the number of cases and fatalities, geographic distribution, and number of nations affected, highlights the need for safe, effective, and readily available antiviral agents for treatment and prevention of acute Ebola virus (EBOV) disease (EVD) or sequelae. No antiviral therapeutics have yet received regulatory approval or demonstrated clinical efficacy. Here we report the discovery of a novel small molecule GS-5734, a monophosphoramidate prodrug of an adenosine analogue, with antiviral activity against EBOV. GS-5734 exhibits antiviral activity against multiple variants of EBOV and other filoviruses in cell-based assays. The pharmacologically active nucleoside triphosphate (NTP) is efficiently formed in multiple human cell types incubated with GS-5734 in vitro, and the NTP acts as an alternative substrate and RNA-chain terminator in primer-extension assays using a surrogate respiratory syncytial virus RNA polymerase. Intravenous administration of GS-5734 to nonhuman primates resulted in persistent NTP levels in peripheral blood mononuclear cells (half-life, 14 h) and distribution to sanctuary sites for viral replication including testes, eyes, and brain. In a rhesus monkey model of EVD, once-daily intravenous administration of 10 mg kg(-1) GS-5734 for 12 days resulted in profound suppression of EBOV replication and protected 100% of EBOV-infected animals against lethal disease, ameliorating clinical disease signs and pathophysiological markers, even when treatments were initiated three days after virus exposure when systemic viral RNA was detected in two out of six treated animals. These results show the first substantive post-exposure protection by a small-molecule antiviral compound against EBOV in nonhuman primates. The broad-spectrum antiviral activity of GS-5734 in vitro against other pathogenic RNA viruses, including filoviruses, arenaviruses, and coronaviruses, suggests the potential for wider medical use. GS-5734 is amenable to large-scale manufacturing, and clinical studies investigating the drug safety and pharmacokinetics are ongoing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Warren, Travis K -- Jordan, Robert -- Lo, Michael K -- Ray, Adrian S -- Mackman, Richard L -- Soloveva, Veronica -- Siegel, Dustin -- Perron, Michel -- Bannister, Roy -- Hui, Hon C -- Larson, Nate -- Strickley, Robert -- Wells, Jay -- Stuthman, Kelly S -- Van Tongeren, Sean A -- Garza, Nicole L -- Donnelly, Ginger -- Shurtleff, Amy C -- Retterer, Cary J -- Gharaibeh, Dima -- Zamani, Rouzbeh -- Kenny, Tara -- Eaton, Brett P -- Grimes, Elizabeth -- Welch, Lisa S -- Gomba, Laura -- Wilhelmsen, Catherine L -- Nichols, Donald K -- Nuss, Jonathan E -- Nagle, Elyse R -- Kugelman, Jeffrey R -- Palacios, Gustavo -- Doerffler, Edward -- Neville, Sean -- Carra, Ernest -- Clarke, Michael O -- Zhang, Lijun -- Lew, Willard -- Ross, Bruce -- Wang, Queenie -- Chun, Kwon -- Wolfe, Lydia -- Babusis, Darius -- Park, Yeojin -- Stray, Kirsten M -- Trancheva, Iva -- Feng, Joy Y -- Barauskas, Ona -- Xu, Yili -- Wong, Pamela -- Braun, Molly R -- Flint, Mike -- McMullan, Laura K -- Chen, Shan-Shan -- Fearns, Rachel -- Swaminathan, Swami -- Mayers, Douglas L -- Spiropoulou, Christina F -- Lee, William A -- Nichol, Stuart T -- Cihlar, Tomas -- Bavari, Sina -- R01 AI113321/AI/NIAID NIH HHS/ -- R01AI113321/AI/NIAID NIH HHS/ -- England -- Nature. 2016 Mar 17;531(7594):381-5. doi: 10.1038/nature17180. Epub 2016 Mar 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉United States Army Medical Research Institute of Infectious Diseases, Frederick, Maryland 21702, USA. ; United States Army Medical Research Institute of Infectious Diseases, Therapeutic Development Center, Frederick, Maryland 21702, USA. ; Gilead Sciences, Foster City, California 94404, USA. ; Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. ; Boston University School of Medicine, Boston, Massachusetts 02118, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26934220" target="_blank"〉PubMed〈/a〉
    Keywords: Alanine/*analogs & derivatives/pharmacokinetics/pharmacology/therapeutic use ; Amino Acid Sequence ; Animals ; Antiviral Agents/pharmacokinetics/pharmacology/*therapeutic use ; Cell Line, Tumor ; Ebolavirus/drug effects ; Female ; HeLa Cells ; Hemorrhagic Fever, Ebola/*drug therapy/prevention & control ; Humans ; Macaca mulatta/*virology ; Male ; Molecular Sequence Data ; Organ Specificity ; Prodrugs/pharmacokinetics/pharmacology/therapeutic use ; Ribonucleotides/pharmacokinetics/pharmacology/*therapeutic use
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  • 16
    Publication Date: 2016-04-05
    Description: The human sigma1 receptor is an enigmatic endoplasmic-reticulum-resident transmembrane protein implicated in a variety of disorders including depression, drug addiction, and neuropathic pain. Recently, an additional connection to amyotrophic lateral sclerosis has emerged from studies of human genetics and mouse models. Unlike many transmembrane receptors that belong to large, extensively studied families such as G-protein-coupled receptors or ligand-gated ion channels, the sigma1 receptor is an evolutionary isolate with no discernible similarity to any other human protein. Despite its increasingly clear importance in human physiology and disease, the molecular architecture of the sigma1 receptor and its regulation by drug-like compounds remain poorly defined. Here we report crystal structures of the human sigma1 receptor in complex with two chemically divergent ligands, PD144418 and 4-IBP. The structures reveal a trimeric architecture with a single transmembrane domain in each protomer. The carboxy-terminal domain of the receptor shows an extensive flat, hydrophobic membrane-proximal surface, suggesting an intimate association with the cytosolic surface of the endoplasmic reticulum membrane in cells. This domain includes a cupin-like beta-barrel with the ligand-binding site buried at its centre. This large, hydrophobic ligand-binding cavity shows remarkable plasticity in ligand recognition, binding the two ligands in similar positions despite dissimilar chemical structures. Taken together, these results reveal the overall architecture, oligomerization state, and molecular basis for ligand recognition by this important but poorly understood protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schmidt, Hayden R -- Zheng, Sanduo -- Gurpinar, Esin -- Koehl, Antoine -- Manglik, Aashish -- Kruse, Andrew C -- T32GM007226/GM/NIGMS NIH HHS/ -- England -- Nature. 2016 Apr 28;532(7600):527-30. doi: 10.1038/nature17391. Epub 2016 Apr 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27042935" target="_blank"〉PubMed〈/a〉
    Keywords: Benzamides/chemistry/metabolism ; Binding Sites ; Crystallography, X-Ray ; Endoplasmic Reticulum/metabolism ; Humans ; Hydrophobic and Hydrophilic Interactions ; Intracellular Membranes/metabolism ; Isoxazoles/chemistry/metabolism ; Ligands ; Models, Molecular ; Piperidines/chemistry/metabolism ; Protein Structure, Tertiary ; Pyridines/chemistry/metabolism ; Receptors, sigma/*chemistry/metabolism ; Substrate Specificity
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  • 17
    Publication Date: 2016-01-28
    Description: Schizophrenia is a heritable brain illness with unknown pathogenic mechanisms. Schizophrenia's strongest genetic association at a population level involves variation in the major histocompatibility complex (MHC) locus, but the genes and molecular mechanisms accounting for this have been challenging to identify. Here we show that this association arises in part from many structurally diverse alleles of the complement component 4 (C4) genes. We found that these alleles generated widely varying levels of C4A and C4B expression in the brain, with each common C4 allele associating with schizophrenia in proportion to its tendency to generate greater expression of C4A. Human C4 protein localized to neuronal synapses, dendrites, axons, and cell bodies. In mice, C4 mediated synapse elimination during postnatal development. These results implicate excessive complement activity in the development of schizophrenia and may help explain the reduced numbers of synapses in the brains of individuals with schizophrenia.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4752392/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4752392/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sekar, Aswin -- Bialas, Allison R -- de Rivera, Heather -- Davis, Avery -- Hammond, Timothy R -- Kamitaki, Nolan -- Tooley, Katherine -- Presumey, Jessy -- Baum, Matthew -- Van Doren, Vanessa -- Genovese, Giulio -- Rose, Samuel A -- Handsaker, Robert E -- Schizophrenia Working Group of the Psychiatric Genomics Consortium -- Daly, Mark J -- Carroll, Michael C -- Stevens, Beth -- McCarroll, Steven A -- R01 HG006855/HG/NHGRI NIH HHS/ -- R01 MH077139/MH/NIMH NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- U01 MH105641/MH/NIMH NIH HHS/ -- England -- Nature. 2016 Feb 11;530(7589):177-83. doi: 10.1038/nature16549. Epub 2016 Jan 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; MD-PhD Program, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts 02115, USA. ; Analytical and Translational Genetics Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26814963" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Animals ; Axons/metabolism ; Base Sequence ; Brain/metabolism/pathology ; Complement C4/chemistry/*genetics ; Complement Pathway, Classical ; Dendrites/metabolism ; Gene Dosage/genetics ; Gene Expression Regulation/genetics ; Genetic Predisposition to Disease/*genetics ; Genetic Variation/*genetics ; Haplotypes/genetics ; Humans ; Major Histocompatibility Complex/genetics ; Mice ; Models, Animal ; Neuronal Plasticity/genetics/physiology ; Polymorphism, Single Nucleotide/genetics ; RNA, Messenger/analysis/genetics ; Risk Factors ; Schizophrenia/*genetics/pathology ; Synapses/metabolism
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  • 18
    Publication Date: 2016-03-08
    Description: Hydrophobic signal sequences target secretory polypeptides to a protein-conducting channel formed by a heterotrimeric membrane protein complex, the prokaryotic SecY or eukaryotic Sec61 complex. How signal sequences are recognized is poorly understood, particularly because they are diverse in sequence and length. Structures of the inactive channel show that the largest subunit, SecY or Sec61alpha, consists of two halves that form an hourglass-shaped pore with a constriction in the middle of the membrane and a lateral gate that faces lipid. The cytoplasmic funnel is empty, while the extracellular funnel is filled with a plug domain. In bacteria, the SecY channel associates with the translating ribosome in co-translational translocation, and with the SecA ATPase in post-translational translocation. How a translocating polypeptide inserts into the channel is uncertain, as cryo-electron microscopy structures of the active channel have a relatively low resolution (~10 A) or are of insufficient quality. Here we report a crystal structure of the active channel, assembled from SecY complex, the SecA ATPase, and a segment of a secretory protein fused into SecA. The translocating protein segment inserts into the channel as a loop, displacing the plug domain. The hydrophobic core of the signal sequence forms a helix that sits in a groove outside the lateral gate, while the following polypeptide segment intercalates into the gate. The carboxy (C)-terminal section of the polypeptide loop is located in the channel, surrounded by residues of the pore ring. Thus, during translocation, the hydrophobic segments of signal sequences, and probably bilayer-spanning domains of nascent membrane proteins, exit the lateral gate and dock at a specific site that faces the lipid phase.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855518/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4855518/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Long -- Park, Eunyong -- Ling, JingJing -- Ingram, Jessica -- Ploegh, Hidde -- Rapoport, Tom A -- GM052586/GM/NIGMS NIH HHS/ -- R01 GM052586/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2016 Mar 17;531(7594):395-9. doi: 10.1038/nature17163. Epub 2016 Mar 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Harvard Medical School, Department of Cell Biology, 240 Longwood Avenue, Boston, Massachusetts 02115, USA. ; Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, Massachusetts 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26950603" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/*chemistry/*metabolism ; Bacterial Proteins/*chemistry/*metabolism ; Binding Sites ; Crystallography, X-Ray ; Hydrophobic and Hydrophilic Interactions ; Lipid Bilayers/chemistry/metabolism ; Membrane Transport Proteins/*chemistry/*metabolism ; Models, Molecular ; Protein Sorting Signals ; Protein Structure, Tertiary
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  • 19
    Publication Date: 2016-01-08
    Description: Influenza pandemics occur unpredictably when zoonotic influenza viruses with novel antigenicity acquire the ability to transmit amongst humans. Host range breaches are limited by incompatibilities between avian virus components and the human host. Barriers include receptor preference, virion stability and poor activity of the avian virus RNA-dependent RNA polymerase in human cells. Mutants of the heterotrimeric viral polymerase components, particularly PB2 protein, are selected during mammalian adaptation, but their mode of action is unknown. We show that a species-specific difference in host protein ANP32A accounts for the suboptimal function of avian virus polymerase in mammalian cells. Avian ANP32A possesses an additional 33 amino acids between the leucine-rich repeats and carboxy-terminal low-complexity acidic region domains. In mammalian cells, avian ANP32A rescued the suboptimal function of avian virus polymerase to levels similar to mammalian-adapted polymerase. Deletion of the avian-specific sequence from chicken ANP32A abrogated this activity, whereas its insertion into human ANP32A, or closely related ANP32B, supported avian virus polymerase function. Substitutions, such as PB2(E627K), were rapidly selected upon infection of humans with avian H5N1 or H7N9 influenza viruses, adapting the viral polymerase for the shorter mammalian ANP32A. Thus ANP32A represents an essential host partner co-opted to support influenza virus replication and is a candidate host target for novel antivirals.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4710677/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4710677/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Long, Jason S -- Giotis, Efstathios S -- Moncorge, Olivier -- Frise, Rebecca -- Mistry, Bhakti -- James, Joe -- Morisson, Mireille -- Iqbal, Munir -- Vignal, Alain -- Skinner, Michael A -- Barclay, Wendy S -- 087039/Z/08/Z/Wellcome Trust/United Kingdom -- BB/K002465/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBS/E/I/00001708/Biotechnology and Biological Sciences Research Council/United Kingdom -- G0600006/Medical Research Council/United Kingdom -- England -- Nature. 2016 Jan 7;529(7584):101-4. doi: 10.1038/nature16474.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Virology, Department of Medicine, Imperial College London, St Mary's Campus, London W2 1PG, UK. ; Centre d'etudes d'agents Pathogenes et Biotechnologies pour la Sante (CPBS), FRE 3689, CNRS-UM, 34293 Montpellier, France. ; Avian Viral Diseases Programme, The Pirbright Institute, Ash Road, Pirbright, Woking GU24 0NF, UK. ; UMR INRA/Genetique Physiologie et Systemes d'Elevage, INRA, 31326 Castanet-Tolosan, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26738596" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Avian Proteins/*chemistry/deficiency/*metabolism ; Cell Line ; Chickens/virology ; Cricetinae ; Cricetulus ; Dogs ; Evolution, Molecular ; Gene Expression Regulation, Viral ; Gene Knockdown Techniques ; *Host Specificity ; Humans ; Influenza A Virus, H5N1 Subtype/enzymology/genetics/physiology ; Influenza A Virus, H7N9 Subtype/enzymology/genetics/physiology ; Influenza A virus/*enzymology/genetics/physiology ; Intracellular Signaling Peptides and Proteins/*chemistry/deficiency/*metabolism ; RNA Replicase/genetics/*metabolism ; Species Specificity ; Transcription, Genetic ; Viral Proteins/genetics/*metabolism ; Virus Replication
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  • 20
    Publication Date: 2016-04-28
    Description: The Bacillus thuringiensis delta-endotoxins (Bt toxins) are widely used insecticidal proteins in engineered crops that provide agricultural, economic, and environmental benefits. The development of insect resistance to Bt toxins endangers their long-term effectiveness. Here we have developed a phage-assisted continuous evolution selection that rapidly evolves high-affinity protein-protein interactions, and applied this system to evolve variants of the Bt toxin Cry1Ac that bind a cadherin-like receptor from the insect pest Trichoplusia ni (TnCAD) that is not natively bound by wild-type Cry1Ac. The resulting evolved Cry1Ac variants bind TnCAD with high affinity (dissociation constant Kd = 11-41 nM), kill TnCAD-expressing insect cells that are not susceptible to wild-type Cry1Ac, and kill Cry1Ac-resistant T. ni insects up to 335-fold more potently than wild-type Cry1Ac. Our findings establish that the evolution of Bt toxins with novel insect cell receptor affinity can overcome insect Bt toxin resistance and confer lethality approaching that of the wild-type Bt toxin against non-resistant insects.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865400/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865400/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Badran, Ahmed H -- Guzov, Victor M -- Huai, Qing -- Kemp, Melissa M -- Vishwanath, Prashanth -- Kain, Wendy -- Nance, Autumn M -- Evdokimov, Artem -- Moshiri, Farhad -- Turner, Keith H -- Wang, Ping -- Malvar, Thomas -- Liu, David R -- R01 EB022376/EB/NIBIB NIH HHS/ -- R01EB022376/EB/NIBIB NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2016 May 5;533(7601):58-63. doi: 10.1038/nature17938. Epub 2016 Apr 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA. ; Howard Hughes Medical Institute, Harvard University, Cambridge, Massachusetts 02138, USA. ; Monsanto Company, 245 First Street, Suite 200, Cambridge, Massachusetts 02142, USA. ; Department of Entomology, Cornell University, Geneva, New York 14456, USA. ; Monsanto Company, 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27120167" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bacillus thuringiensis/*genetics ; Bacterial Proteins/*genetics/*metabolism ; Bacteriophages/genetics ; Biotechnology ; Cadherins/metabolism ; Cell Death ; Consensus Sequence ; Crops, Agricultural/genetics/metabolism ; Directed Molecular Evolution/*methods ; Endotoxins/*genetics/*metabolism ; Genetic Variation/*genetics ; Hemolysin Proteins/*genetics/*metabolism ; *Insecticide Resistance ; Insecticides/metabolism ; Molecular Sequence Data ; Moths/cytology/*physiology ; Mutagenesis/genetics ; Pest Control, Biological/*methods ; Plants, Genetically Modified ; Protein Binding/genetics ; Protein Stability ; Selection, Genetic
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  • 21
    Publication Date: 2016-01-21
    Description: Cellular immunity against viral infection and tumour cells depends on antigen presentation by major histocompatibility complex class I (MHC I) molecules. Intracellular antigenic peptides are transported into the endoplasmic reticulum by the transporter associated with antigen processing (TAP) and then loaded onto the nascent MHC I molecules, which are exported to the cell surface and present peptides to the immune system. Cytotoxic T lymphocytes recognize non-self peptides and program the infected or malignant cells for apoptosis. Defects in TAP account for immunodeficiency and tumour development. To escape immune surveillance, some viruses have evolved strategies either to downregulate TAP expression or directly inhibit TAP activity. So far, neither the architecture of TAP nor the mechanism of viral inhibition has been elucidated at the structural level. Here we describe the cryo-electron microscopy structure of human TAP in complex with its inhibitor ICP47, a small protein produced by the herpes simplex virus I. Here we show that the 12 transmembrane helices and 2 cytosolic nucleotide-binding domains of the transporter adopt an inward-facing conformation with the two nucleotide-binding domains separated. The viral inhibitor ICP47 forms a long helical hairpin, which plugs the translocation pathway of TAP from the cytoplasmic side. Association of ICP47 precludes substrate binding and prevents nucleotide-binding domain closure necessary for ATP hydrolysis. This work illustrates a striking example of immune evasion by persistent viruses. By blocking viral antigens from entering the endoplasmic reticulum, herpes simplex virus is hidden from cytotoxic T lymphocytes, which may contribute to establishing a lifelong infection in the host.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oldham, Michael L -- Hite, Richard K -- Steffen, Alanna M -- Damko, Ermelinda -- Li, Zongli -- Walz, Thomas -- Chen, Jue -- Howard Hughes Medical Institute/ -- England -- Nature. 2016 Jan 28;529(7587):537-40. doi: 10.1038/nature16506. Epub 2016 Jan 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA. ; Howard Hughes Medical Institute, 4000 Jones Bridge Road, Chevy Chase, Maryland 20815, USA. ; Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26789246" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Binding Cassette Transporters/antagonists & ; inhibitors/chemistry/*metabolism/*ultrastructure ; Amino Acid Sequence ; Antigens, Viral/immunology/metabolism ; *Cryoelectron Microscopy ; Endoplasmic Reticulum/metabolism ; Herpesvirus 1, Human/chemistry/*immunology/metabolism/ultrastructure ; Immediate-Early Proteins/chemistry/*metabolism/*ultrastructure ; *Immune Evasion ; Models, Molecular ; Molecular Sequence Data ; Protein Binding ; Protein Conformation
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  • 22
    Publication Date: 2016-04-01
    Description: The cullin-RING ubiquitin E3 ligase (CRL) family comprises over 200 members in humans. The COP9 signalosome complex (CSN) regulates CRLs by removing their ubiquitin-like activator NEDD8. The CUL4A-RBX1-DDB1-DDB2 complex (CRL4A(DDB2)) monitors the genome for ultraviolet-light-induced DNA damage. CRL4A(DBB2) is inactive in the absence of damaged DNA and requires CSN to regulate the repair process. The structural basis of CSN binding to CRL4A(DDB2) and the principles of CSN activation are poorly understood. Here we present cryo-electron microscopy structures for CSN in complex with neddylated CRL4A ligases to 6.4 A resolution. The CSN conformers defined by cryo-electron microscopy and a novel apo-CSN crystal structure indicate an induced-fit mechanism that drives CSN activation by neddylated CRLs. We find that CSN and a substrate cannot bind simultaneously to CRL4A, favouring a deneddylated, inactive state for substrate-free CRL4 complexes. These architectural and regulatory principles appear conserved across CRL families, allowing global regulation by CSN.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cavadini, Simone -- Fischer, Eric S -- Bunker, Richard D -- Potenza, Alessandro -- Lingaraju, Gondichatnahalli M -- Goldie, Kenneth N -- Mohamed, Weaam I -- Faty, Mahamadou -- Petzold, Georg -- Beckwith, Rohan E J -- Tichkule, Ritesh B -- Hassiepen, Ulrich -- Abdulrahman, Wassim -- Pantelic, Radosav S -- Matsumoto, Syota -- Sugasawa, Kaoru -- Stahlberg, Henning -- Thoma, Nicolas H -- England -- Nature. 2016 Mar 31;531(7596):598-603. doi: 10.1038/nature17416.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland. ; University of Basel, Petersplatz 10, 4003 Basel, Switzerland. ; Department of Cancer Biology, Dana-Farber Cancer Institute, LC-4312, 360 Longwood Avenue, Boston, Massachusetts 02215, USA. ; Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02215, USA. ; Center for Cellular Imaging and NanoAnalytics, Biozentrum, University of Basel, 4058 Basel, Switzerland. ; Novartis Institutes for Biomedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. ; Novartis Pharma AG, Institutes for Biomedical Research, Novartis Campus, 4056 Basel, Switzerland. ; Gatan R&D, 5974 W. Las Positas Boulevard, Pleasanton, California 94588, USA. ; Biosignal Research Center, Organization of Advanced Science and Technology, Kobe University, Kobe 657-8501, Japan. ; Graduate School of Science, Kobe University, Kobe, 657-8501, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27029275" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Apoproteins/chemistry/metabolism/ultrastructure ; Binding Sites ; *Biocatalysis ; Carrier Proteins/chemistry/metabolism/ultrastructure ; Cryoelectron Microscopy ; Crystallography, X-Ray ; Cullin Proteins/chemistry/metabolism/ultrastructure ; DNA Damage ; DNA-Binding Proteins/chemistry/metabolism/ultrastructure ; Humans ; Kinetics ; Models, Molecular ; Multiprotein Complexes/chemistry/*metabolism/*ultrastructure ; Peptide Hydrolases/chemistry/*metabolism/*ultrastructure ; Protein Binding ; Ubiquitination ; Ubiquitins/metabolism
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  • 23
    Publication Date: 2016-01-21
    Description: The p53 pro-apoptotic tumour suppressor is mutated or functionally altered in most cancers. In epithelial tumours induced by 'high-risk' mucosal human papilloma viruses, including human cervical carcinoma and a growing number of head-and-neck cancers, p53 is degraded by the viral oncoprotein E6 (ref. 2). In this process, E6 binds to a short leucine (L)-rich LxxLL consensus sequence within the cellular ubiquitin ligase E6AP. Subsequently, the E6/E6AP heterodimer recruits and degrades p53 (ref. 4). Neither E6 nor E6AP are separately able to recruit p53 (refs 3, 5), and the precise mode of assembly of E6, E6AP and p53 is unknown. Here we solve the crystal structure of a ternary complex comprising full-length human papilloma virus type 16 (HPV-16) E6, the LxxLL motif of E6AP and the core domain of p53. The LxxLL motif of E6AP renders the conformation of E6 competent for interaction with p53 by structuring a p53-binding cleft on E6. Mutagenesis of critical positions at the E6-p53 interface disrupts p53 degradation. The E6-binding site of p53 is distal from previously described DNA- and protein-binding surfaces of the core domain. This suggests that, in principle, E6 may avoid competition with cellular factors by targeting both free and bound p53 molecules. The E6/E6AP/p53 complex represents a prototype of viral hijacking of both the ubiquitin-mediated protein degradation pathway and the p53 tumour suppressor pathway. The present structure provides a framework for the design of inhibitory therapeutic strategies against oncogenesis mediated by human papilloma virus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Martinez-Zapien, Denise -- Ruiz, Francesc Xavier -- Poirson, Juline -- Mitschler, Andre -- Ramirez, Juan -- Forster, Anne -- Cousido-Siah, Alexandra -- Masson, Murielle -- Vande Pol, Scott -- Podjarny, Alberto -- Trave, Gilles -- Zanier, Katia -- R01CA134737/CA/NCI NIH HHS/ -- England -- Nature. 2016 Jan 28;529(7587):541-5. doi: 10.1038/nature16481. Epub 2016 Jan 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Equipe labellisee Ligue, Biotechnologie et signalisation cellulaire UMR 7242, Ecole Superieure de Biotechnologie de Strasbourg, Boulevard Sebastien Brant, BP 10413, F-67412 Illkirch, France. ; Institut de Genetique et de Biologie Moleculaire et Cellulaire (IGBMC)/INSERM U964/CNRS UMR 7104/Universite de Strasbourg, 1 rue Laurent Fries, BP 10142, F-67404 Illkirch, France. ; Department of Pathology, University of Virginia, PO Box 800904, Charlottesville, Virginia 22908-0904, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26789255" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Binding Sites ; Crystallography, X-Ray ; Human papillomavirus 16/chemistry/*metabolism/pathogenicity ; Humans ; Models, Biological ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Oncogene Proteins, Viral/*chemistry/genetics/*metabolism ; Protein Binding ; Protein Structure, Tertiary ; *Proteolysis ; Repressor Proteins/*chemistry/genetics/*metabolism ; Tumor Suppressor Protein p53/*chemistry/genetics/*metabolism ; Ubiquitin-Protein Ligases/*chemistry
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  • 24
    Publication Date: 2016-04-07
    Description: Signalling by ubiquitination regulates virtually every cellular process in eukaryotes. Covalent attachment of ubiquitin to a substrate is catalysed by the E1, E2 and E3 three-enzyme cascade, which links the carboxy terminus of ubiquitin to the epsilon-amino group of, in most cases, a lysine of the substrate via an isopeptide bond. Given the essential roles of ubiquitination in the regulation of the immune system, it is not surprising that the ubiquitination network is a common target for diverse infectious agents. For example, many bacterial pathogens exploit ubiquitin signalling using virulence factors that function as E3 ligases, deubiquitinases or as enzymes that directly attack ubiquitin. The bacterial pathogen Legionella pneumophila utilizes approximately 300 effectors that modulate diverse host processes to create a permissive niche for its replication in phagocytes. Here we demonstrate that members of the SidE effector family of L. pneumophila ubiquitinate multiple Rab small GTPases associated with the endoplasmic reticulum. Moreover, we show that these proteins are capable of catalysing ubiquitination without the need for the E1 and E2 enzymes. A putative mono-ADP-ribosyltransferase motif critical for the ubiquitination activity is also essential for the role of the SidE family in intracellular bacterial replication in a protozoan host. The E1/E2-independent ubiquitination catalysed by these enzymes is energized by nicotinamide adenine dinucleotide, which activates ubiquitin by the formation of ADP-ribosylated ubiquitin. These results establish that ubiquitination can be catalysed by a single enzyme, the activity of which does not require ATP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Qiu, Jiazhang -- Sheedlo, Michael J -- Yu, Kaiwen -- Tan, Yunhao -- Nakayasu, Ernesto S -- Das, Chittaranjan -- Liu, Xiaoyun -- Luo, Zhao-Qing -- 2R01GM103401/GM/NIGMS NIH HHS/ -- K02AI085403/AI/NIAID NIH HHS/ -- R21AI105714/AI/NIAID NIH HHS/ -- R56AI103168/AI/NIAID NIH HHS/ -- England -- Nature. 2016 May 5;533(7601):120-4. doi: 10.1038/nature17657. Epub 2016 Apr 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Purdue Institute for Inflammation, Immunology and Infectious Disease and Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907, USA. ; Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, USA. ; Institute of Analytical Chemistry and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. ; Biological Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27049943" target="_blank"〉PubMed〈/a〉
    Keywords: ADP Ribose Transferases/chemistry/metabolism ; Adenosine Diphosphate Ribose/metabolism ; Adenosine Triphosphate ; Amino Acid Motifs ; Amino Acid Sequence ; Bacterial Load ; Bacterial Proteins/*metabolism ; Biocatalysis ; Endoplasmic Reticulum/enzymology/metabolism ; Legionella pneumophila/*chemistry/cytology/enzymology/pathogenicity ; Membrane Proteins/metabolism ; Molecular Sequence Data ; NAD/metabolism ; Ubiquitin/chemistry/metabolism ; Ubiquitin-Activating Enzymes ; Ubiquitin-Conjugating Enzymes ; *Ubiquitination ; Virulence Factors/metabolism ; rab GTP-Binding Proteins/chemistry/metabolism
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  • 25
    Publication Date: 2016-03-11
    Description: Two-pore channels (TPCs) comprise a subfamily (TPC1-3) of eukaryotic voltage- and ligand-gated cation channels with two non-equivalent tandem pore-forming subunits that dimerize to form quasi-tetramers. Found in vacuolar or endolysosomal membranes, they regulate the conductance of sodium and calcium ions, intravesicular pH, trafficking and excitability. TPCs are activated by a decrease in transmembrane potential and an increase in cytosolic calcium concentrations, are inhibited by low luminal pH and calcium, and are regulated by phosphorylation. Here we report the crystal structure of TPC1 from Arabidopsis thaliana at 2.87 A resolution as a basis for understanding ion permeation, channel activation, the location of voltage-sensing domains and regulatory ion-binding sites. We determined sites of phosphorylation in the amino-terminal and carboxy-terminal domains that are positioned to allosterically modulate cytoplasmic Ca(2+) activation. One of the two voltage-sensing domains (VSD2) encodes voltage sensitivity and inhibition by luminal Ca(2+) and adopts a conformation distinct from the activated state observed in structures of other voltage-gated ion channels. The structure shows that potent pharmacophore trans-Ned-19 (ref. 17) acts allosterically by clamping the pore domains to VSD2. In animals, Ned-19 prevents infection by Ebola virus and other filoviruses, presumably by altering their fusion with the endolysosome and delivery of their contents into the cytoplasm.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4863712/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4863712/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kintzer, Alexander F -- Stroud, Robert M -- GM24485/GM/NIGMS NIH HHS/ -- P41-GM103311/GM/NIGMS NIH HHS/ -- P41-RR001614/RR/NCRR NIH HHS/ -- P41GM103393/GM/NIGMS NIH HHS/ -- R37 GM024485/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2016 Mar 10;531(7593):258-62. doi: 10.1038/nature17194.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, University of California, San Francisco, California 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26961658" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation/drug effects ; Arabidopsis/*chemistry ; Arabidopsis Proteins/*antagonists & inhibitors/*chemistry/metabolism ; Binding Sites ; Calcium/metabolism/pharmacology ; Calcium Channels/*chemistry/metabolism ; Carbolines/metabolism/pharmacology ; Crystallography, X-Ray ; Ebolavirus/drug effects ; Endosomes/drug effects/metabolism/virology ; *Ion Channel Gating/drug effects ; Ion Transport/drug effects ; Models, Molecular ; Phosphorylation ; Piperazines/metabolism/pharmacology ; Protein Structure, Tertiary/drug effects
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  • 26
    Publication Date: 2016-03-08
    Description: The conserved Piwi family of proteins and piwi-interacting RNAs (piRNAs) have a central role in genomic stability, which is inextricably linked to germ-cell formation, by forming Piwi ribonucleoproteins (piRNPs) that silence transposable elements. In Drosophila melanogaster and other animals, primordial germ-cell specification in the developing embryo is driven by maternal messenger RNAs and proteins that assemble into specialized messenger ribonucleoproteins (mRNPs) localized in the germ (pole) plasm at the posterior of the oocyte. Maternal piRNPs, especially those loaded on the Piwi protein Aubergine (Aub), are transmitted to the germ plasm to initiate transposon silencing in the offspring germ line. The transport of mRNAs to the oocyte by midoogenesis is an active, microtubule-dependent process; mRNAs necessary for primordial germ-cell formation are enriched in the germ plasm at late oogenesis via a diffusion and entrapment mechanism, the molecular identity of which remains unknown. Aub is a central component of germ granule RNPs, which house mRNAs in the germ plasm, and interactions between Aub and Tudor are essential for the formation of germ granules. Here we show that Aub-loaded piRNAs use partial base-pairing characteristics of Argonaute RNPs to bind mRNAs randomly in Drosophila, acting as an adhesive trap that captures mRNAs in the germ plasm, in a Tudor-dependent manner. Notably, germ plasm mRNAs in drosophilids are generally longer and more abundant than other mRNAs, suggesting that they provide more target sites for piRNAs to promote their preferential tethering in germ granules. Thus, complexes containing Tudor, Aub piRNPs and mRNAs couple piRNA inheritance with germline specification. Our findings reveal an unexpected function for piRNP complexes in mRNA trapping that may be generally relevant to the function of animal germ granules.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4795963/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4795963/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vourekas, Anastassios -- Alexiou, Panagiotis -- Vrettos, Nicholas -- Maragkakis, Manolis -- Mourelatos, Zissimos -- GM072777/GM/NIGMS NIH HHS/ -- R01 GM072777/GM/NIGMS NIH HHS/ -- England -- Nature. 2016 Mar 17;531(7594):390-4. doi: 10.1038/nature17150. Epub 2016 Mar 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Laboratory Medicine, Division of Neuropathology, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine; PENN Genome Frontiers Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26950602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argonaute Proteins/metabolism ; Base Pairing ; Binding Sites ; Cytoplasm/*genetics/*metabolism ; DNA Transposable Elements/genetics ; Diffusion ; Drosophila Proteins/metabolism ; Drosophila melanogaster/cytology/*genetics/metabolism ; Female ; Male ; Membrane Transport Proteins/metabolism ; Oocytes/*cytology/metabolism ; Oogenesis ; Peptide Initiation Factors/metabolism ; RNA Interference ; *RNA Transport ; RNA, Messenger/chemistry/*genetics/metabolism ; RNA, Small Interfering/chemistry/*genetics/metabolism ; Ribonucleoproteins/metabolism ; Transcriptome/genetics
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  • 27
    Publication Date: 2016-02-04
    Description: The DNA-binding protein PRDM9 directs positioning of the double-strand breaks (DSBs) that initiate meiotic recombination in mice and humans. Prdm9 is the only mammalian speciation gene yet identified and is responsible for sterility phenotypes in male hybrids of certain mouse subspecies. To investigate PRDM9 binding and its role in fertility and meiotic recombination, we humanized the DNA-binding domain of PRDM9 in C57BL/6 mice. This change repositions DSB hotspots and completely restores fertility in male hybrids. Here we show that alteration of one Prdm9 allele impacts the behaviour of DSBs controlled by the other allele at chromosome-wide scales. These effects correlate strongly with the degree to which each PRDM9 variant binds both homologues at the DSB sites it controls. Furthermore, higher genome-wide levels of such 'symmetric' PRDM9 binding associate with increasing fertility measures, and comparisons of individual hotspots suggest binding symmetry plays a downstream role in the recombination process. These findings reveal that subspecies-specific degradation of PRDM9 binding sites by meiotic drive, which steadily increases asymmetric PRDM9 binding, has impacts beyond simply changing hotspot positions, and strongly support a direct involvement in hybrid infertility. Because such meiotic drive occurs across mammals, PRDM9 may play a wider, yet transient, role in the early stages of speciation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4756437/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4756437/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davies, Benjamin -- Hatton, Edouard -- Altemose, Nicolas -- Hussin, Julie G -- Pratto, Florencia -- Zhang, Gang -- Hinch, Anjali Gupta -- Moralli, Daniela -- Biggs, Daniel -- Diaz, Rebeca -- Preece, Chris -- Li, Ran -- Bitoun, Emmanuelle -- Brick, Kevin -- Green, Catherine M -- Camerini-Otero, R Daniel -- Myers, Simon R -- Donnelly, Peter -- 090532/Z/09/Z/Wellcome Trust/United Kingdom -- 095552/Z/11/Z/Wellcome Trust/United Kingdom -- 098387/Z/12/Z/Wellcome Trust/United Kingdom -- Intramural NIH HHS/ -- England -- Nature. 2016 Feb 11;530(7589):171-6. doi: 10.1038/nature16931. Epub 2016 Feb 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Wellcome Trust Centre for Human Genetics, Roosevelt Drive, University of Oxford, Oxford OX3 7BN, UK. ; Department of Statistics, University of Oxford, 24-29 St. Giles', Oxford OX1 3LB, UK. ; Genetics and Biochemistry Branch, National Institute of Diabetes, Digestive and Kidney Diseases, NIH, Bethesda, Maryland 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26840484" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Binding Sites ; Chromosome Pairing/genetics ; Chromosomes, Mammalian/genetics/metabolism ; DNA Breaks, Double-Stranded ; Female ; *Genetic Speciation ; Histone-Lysine N-Methyltransferase/*chemistry/genetics/*metabolism ; Humans ; Hybridization, Genetic/*genetics ; Infertility/*genetics ; Male ; Meiosis/genetics ; Mice ; Mice, Inbred C57BL ; Protein Binding ; *Protein Engineering ; Protein Structure, Tertiary/genetics ; Recombination, Genetic/genetics ; Zinc Fingers/*genetics
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  • 28
    Publication Date: 2016-03-31
    Description: Accurate chromosome segregation requires timely dissolution of chromosome cohesion after chromosomes are properly attached to the mitotic spindle. Separase is absolutely essential for cohesion dissolution in organisms from yeast to man. It cleaves the kleisin subunit of cohesin and opens the cohesin ring to allow chromosome segregation. Cohesin cleavage is spatiotemporally controlled by separase-associated regulatory proteins, including the inhibitory chaperone securin, and by phosphorylation of both the enzyme and substrates. Dysregulation of this process causes chromosome missegregation and aneuploidy, contributing to cancer and birth defects. Despite its essential functions, atomic structures of separase have not been determined. Here we report crystal structures of the separase protease domain from the thermophilic fungus Chaetomium thermophilum, alone or covalently bound to unphosphorylated and phosphorylated inhibitory peptides derived from a cohesin cleavage site. These structures reveal how separase recognizes cohesin and how cohesin phosphorylation by polo-like kinase 1 (Plk1) enhances cleavage. Consistent with a previous cellular study, mutating two securin residues in a conserved motif that partly matches the separase cleavage consensus converts securin from a separase inhibitor to a substrate. Our study establishes atomic mechanisms of substrate cleavage by separase and suggests competitive inhibition by securin.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847710/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4847710/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, Zhonghui -- Luo, Xuelian -- Yu, Hongtao -- GM107415/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2016 Apr 7;532(7597):131-4. doi: 10.1038/nature17402. Epub 2016 Mar 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, Texas 75390, USA. ; Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, Texas 75390, USA. ; Department of Biophysics, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, Texas 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27027290" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding, Competitive/drug effects ; Cell Cycle Proteins/chemistry/*metabolism ; Chaetomium/*enzymology ; Chromosomal Proteins, Non-Histone/chemistry/*metabolism ; Chromosome Segregation ; Crystallography, X-Ray ; Models, Molecular ; Phosphorylation ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/metabolism ; Proteolysis ; Proto-Oncogene Proteins/metabolism ; Securin/chemistry/genetics/metabolism/pharmacology ; Separase/antagonists & inhibitors/*chemistry/*metabolism ; Structure-Activity Relationship ; Substrate Specificity/genetics
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  • 29
    Publication Date: 2015-07-15
    Description: Surface polysaccharides are important for bacterial interactions with multicellular organisms, and some are virulence factors in pathogens. In the legume-rhizobium symbiosis, bacterial exopolysaccharides (EPS) are essential for the development of infected root nodules. We have identified a gene in Lotus japonicus, Epr3, encoding a receptor-like kinase that controls this infection. We show that epr3 mutants are defective in perception of purified EPS, and that EPR3 binds EPS directly and distinguishes compatible and incompatible EPS in bacterial competition studies. Expression of Epr3 in epidermal cells within the susceptible root zone shows that the protein is involved in bacterial entry, while rhizobial and plant mutant studies suggest that Epr3 regulates bacterial passage through the plant's epidermal cell layer. Finally, we show that Epr3 expression is inducible and dependent on host perception of bacterial nodulation (Nod) factors. Plant-bacterial compatibility and bacterial access to legume roots is thus regulated by a two-stage mechanism involving sequential receptor-mediated recognition of Nod factor and EPS signals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawaharada, Y -- Kelly, S -- Nielsen, M Wibroe -- Hjuler, C T -- Gysel, K -- Muszynski, A -- Carlson, R W -- Thygesen, M B -- Sandal, N -- Asmussen, M H -- Vinther, M -- Andersen, S U -- Krusell, L -- Thirup, S -- Jensen, K J -- Ronson, C W -- Blaise, M -- Radutoiu, S -- Stougaard, J -- England -- Nature. 2015 Jul 16;523(7560):308-12. doi: 10.1038/nature14611. Epub 2015 Jul 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Centre for Carbohydrate Recognition and Signalling. Aarhus University, Aarhus 8000 C, Denmark [2] Department of Molecular Biology and Genetics, Aarhus University, Aarhus 8000 C, Denmark. ; 1] Centre for Carbohydrate Recognition and Signalling. Aarhus University, Aarhus 8000 C, Denmark [2] Department of Molecular Biology and Genetics, Aarhus University, Aarhus 8000 C, Denmark [3] Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand. ; 1] Centre for Carbohydrate Recognition and Signalling. Aarhus University, Aarhus 8000 C, Denmark [2] Department of Chemistry, University of Copenhagen, Frederiksberg 1871 C, Denmark. ; Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602, USA. ; 1] Centre for Carbohydrate Recognition and Signalling. Aarhus University, Aarhus 8000 C, Denmark [2] Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26153863" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Carbohydrate Sequence ; Lipopolysaccharides/chemistry/*metabolism ; Lotus/genetics/*metabolism/*microbiology ; Molecular Sequence Data ; Mutation/genetics ; Phenotype ; Plant Epidermis/metabolism/microbiology ; Plant Proteins/chemistry/genetics/*metabolism ; Plant Root Nodulation ; Protein Kinases/chemistry/genetics/metabolism ; Protein Structure, Tertiary ; Receptors, Cell Surface/chemistry/genetics/*metabolism ; Rhizobium/*metabolism ; Root Nodules, Plant/metabolism/microbiology ; Signal Transduction ; Species Specificity ; Suppression, Genetic/genetics ; *Symbiosis
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  • 30
    Publication Date: 2015-11-13
    Description: Neuroblastoma is a paediatric malignancy that typically arises in early childhood, and is derived from the developing sympathetic nervous system. Clinical phenotypes range from localized tumours with excellent outcomes to widely metastatic disease in which long-term survival is approximately 40% despite intensive therapy. A previous genome-wide association study identified common polymorphisms at the LMO1 gene locus that are highly associated with neuroblastoma susceptibility and oncogenic addiction to LMO1 in the tumour cells. Here we investigate the causal DNA variant at this locus and the mechanism by which it leads to neuroblastoma tumorigenesis. We first imputed all possible genotypes across the LMO1 locus and then mapped highly associated single nucleotide polymorphism (SNPs) to areas of chromatin accessibility, evolutionary conservation and transcription factor binding sites. We show that SNP rs2168101 G〉T is the most highly associated variant (combined P = 7.47 x 10(-29), odds ratio 0.65, 95% confidence interval 0.60-0.70), and resides in a super-enhancer defined by extensive acetylation of histone H3 lysine 27 within the first intron of LMO1. The ancestral G allele that is associated with tumour formation resides in a conserved GATA transcription factor binding motif. We show that the newly evolved protective TATA allele is associated with decreased total LMO1 expression (P = 0.028) in neuroblastoma primary tumours, and ablates GATA3 binding (P 〈 0.0001). We demonstrate allelic imbalance favouring the G-containing strand in tumours heterozygous for this SNP, as demonstrated both by RNA sequencing (P 〈 0.0001) and reporter assays (P = 0.002). These findings indicate that a recently evolved polymorphism within a super-enhancer element in the first intron of LMO1 influences neuroblastoma susceptibility through differential GATA transcription factor binding and direct modulation of LMO1 expression in cis, and this leads to an oncogenic dependency in tumour cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4775078/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4775078/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oldridge, Derek A -- Wood, Andrew C -- Weichert-Leahey, Nina -- Crimmins, Ian -- Sussman, Robyn -- Winter, Cynthia -- McDaniel, Lee D -- Diamond, Maura -- Hart, Lori S -- Zhu, Shizhen -- Durbin, Adam D -- Abraham, Brian J -- Anders, Lars -- Tian, Lifeng -- Zhang, Shile -- Wei, Jun S -- Khan, Javed -- Bramlett, Kelli -- Rahman, Nazneen -- Capasso, Mario -- Iolascon, Achille -- Gerhard, Daniela S -- Guidry Auvil, Jaime M -- Young, Richard A -- Hakonarson, Hakon -- Diskin, Sharon J -- Look, A Thomas -- Maris, John M -- 100210/Wellcome Trust/United Kingdom -- 100210/Z/12/Z/Wellcome Trust/United Kingdom -- 1K99CA178189/CA/NCI NIH HHS/ -- R00-CA151869/CA/NCI NIH HHS/ -- R01 CA124709/CA/NCI NIH HHS/ -- R01 CA180692/CA/NCI NIH HHS/ -- R01-CA109901/CA/NCI NIH HHS/ -- R01-CA124709/CA/NCI NIH HHS/ -- R01-CA180692/CA/NCI NIH HHS/ -- RC1MD004418/MD/NIMHD NIH HHS/ -- T32 HG000046/HG/NHGRI NIH HHS/ -- T32-HG000046/HG/NHGRI NIH HHS/ -- England -- Nature. 2015 Dec 17;528(7582):418-21. doi: 10.1038/nature15540. Epub 2015 Nov 11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Oncology and Center for Childhood Cancer Research, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA. ; Medical Scientist Training Program, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Department of Molecular Medicine and Pathology, University of Auckland, Auckland, Auckland Region 1142, New Zealand. ; Department of Pediatric Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02215, USA. ; Division of Pediatric Hematology/Oncology, Boston Children's Hospital, Boston, Massachusetts 02115, USA. ; Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, USA. ; Whitehead Institute for Biomedical Research and MIT, Boston, Massachusetts 02142, USA. ; Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA. ; Pediatric Oncology Branch, National Cancer Institute, Bethesda, Maryland 20892, USA. ; Thermo Fisher Scientific, Austin, Texas 78744, USA. ; The Institute of Cancer Research, London SM2 5NG, UK. ; University of Naples Federico II, 80131 Naples, Italy. ; CEINGE Biotecnologie Avanzate, 80131 Naples, Italy. ; Office of Cancer Genomics, National Cancer Institute, Bethesda, Maryland 20892, USA. ; Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Abramson Family Cancer Research Institute, Philadelphia, Pennsylvania 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26560027" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Alleles ; Allelic Imbalance ; Binding Sites ; DNA-Binding Proteins/*genetics ; Enhancer Elements, Genetic/*genetics ; Epigenomics ; GATA3 Transcription Factor/metabolism ; Gene Expression Regulation, Neoplastic/genetics ; Genetic Predisposition to Disease/*genetics ; Genome-Wide Association Study ; Genotype ; Histones/chemistry/metabolism ; Humans ; Introns/genetics ; LIM Domain Proteins/*genetics ; Lysine/metabolism ; Neuroblastoma/*genetics ; Organ Specificity ; Polymorphism, Single Nucleotide/*genetics ; Reproducibility of Results ; Transcription Factors/*genetics
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  • 31
    Publication Date: 2015-11-10
    Description: Gene expression is regulated by transcription factors (TFs), proteins that recognize short DNA sequence motifs. Such sequences are very common in the human genome, and an important determinant of the specificity of gene expression is the cooperative binding of multiple TFs to closely located motifs. However, interactions between DNA-bound TFs have not been systematically characterized. To identify TF pairs that bind cooperatively to DNA, and to characterize their spacing and orientation preferences, we have performed consecutive affinity-purification systematic evolution of ligands by exponential enrichment (CAP-SELEX) analysis of 9,400 TF-TF-DNA interactions. This analysis revealed 315 TF-TF interactions recognizing 618 heterodimeric motifs, most of which have not been previously described. The observed cooperativity occurred promiscuously between TFs from diverse structural families. Structural analysis of the TF pairs, including a novel crystal structure of MEIS1 and DLX3 bound to their identified recognition site, revealed that the interactions between the TFs were predominantly mediated by DNA. Most TF pair sites identified involved a large overlap between individual TF recognition motifs, and resulted in recognition of composite sites that were markedly different from the individual TF's motifs. Together, our results indicate that the DNA molecule commonly plays an active role in cooperative interactions that define the gene regulatory lexicon.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jolma, Arttu -- Yin, Yimeng -- Nitta, Kazuhiro R -- Dave, Kashyap -- Popov, Alexander -- Taipale, Minna -- Enge, Martin -- Kivioja, Teemu -- Morgunova, Ekaterina -- Taipale, Jussi -- England -- Nature. 2015 Nov 19;527(7578):384-8. doi: 10.1038/nature15518. Epub 2015 Nov 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biosciences and Nutrition, Karolinska Institutet, SE 141 83, Sweden. ; European Synchrotron Radiation Facility, 38043 Grenoble, France. ; Genome-Scale Biology Program, University of Helsinki, P.O. Box 63, FI-00014, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26550823" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Binding Sites/genetics ; Crystallography, X-Ray ; DNA/*genetics/*metabolism ; Gene Expression Regulation/genetics ; Humans ; Molecular Sequence Data ; Nucleotide Motifs/genetics ; Reproducibility of Results ; *Substrate Specificity/genetics ; Transcription Factors/*metabolism
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  • 32
    Publication Date: 2015-02-06
    Description: Rising temperatures and lessening fresh water supplies are threatening agricultural productivity and have motivated efforts to improve plant water use and drought tolerance. During water deficit, plants produce elevated levels of abscisic acid (ABA), which improves water consumption and stress tolerance by controlling guard cell aperture and other protective responses. One attractive strategy for controlling water use is to develop compounds that activate ABA receptors, but agonists approved for use have yet to be developed. In principle, an engineered ABA receptor that can be activated by an existing agrochemical could achieve this goal. Here we describe a variant of the ABA receptor PYRABACTIN RESISTANCE 1 (PYR1) that possesses nanomolar sensitivity to the agrochemical mandipropamid and demonstrate its efficacy for controlling ABA responses and drought tolerance in transgenic plants. Furthermore, crystallographic studies provide a mechanistic basis for its activity and demonstrate the relative ease with which the PYR1 ligand-binding pocket can be altered to accommodate new ligands. Thus, we have successfully repurposed an agrochemical for a new application using receptor engineering. We anticipate that this strategy will be applied to other plant receptors and represents a new avenue for crop improvement.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, Sang-Youl -- Peterson, Francis C -- Mosquna, Assaf -- Yao, Jin -- Volkman, Brian F -- Cutler, Sean R -- England -- Nature. 2015 Apr 23;520(7548):545-8. doi: 10.1038/nature14123. Epub 2015 Feb 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Center for Plant Cell Biology and Department of Botany and Plant Sciences, University of California, Riverside, California 92521, USA [2] Institute for Integrative Genome Biology, Riverside, California 92521, USA. ; Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25652827" target="_blank"〉PubMed〈/a〉
    Keywords: Abscisic Acid/*metabolism ; Acclimatization/drug effects ; Agrochemicals/*pharmacology ; Amides/*pharmacology ; Arabidopsis/drug effects/genetics/metabolism ; Arabidopsis Proteins/*genetics/*metabolism ; Binding Sites ; Carboxylic Acids/*pharmacology ; Crystallography, X-Ray ; Droughts ; Genetic Engineering ; Genotype ; Ligands ; Lycopersicon esculentum/drug effects/genetics/metabolism ; Membrane Transport Proteins/*genetics/*metabolism ; Models, Molecular ; Plant Transpiration/drug effects ; Plants/*drug effects/genetics/*metabolism ; Plants, Genetically Modified ; Stress, Physiological/drug effects ; Structure-Activity Relationship ; Water/*metabolism
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  • 33
    Publication Date: 2015-04-23
    Description: Ribosomes are translational machineries that catalyse protein synthesis. Ribosome structures from various species are known at the atomic level, but obtaining the structure of the human ribosome has remained a challenge; efforts to address this would be highly relevant with regard to human diseases. Here we report the near-atomic structure of the human ribosome derived from high-resolution single-particle cryo-electron microscopy and atomic model building. The structure has an average resolution of 3.6 A, reaching 2.9 A resolution in the most stable regions. It provides unprecedented insights into ribosomal RNA entities and amino acid side chains, notably of the transfer RNA binding sites and specific molecular interactions with the exit site tRNA. It reveals atomic details of the subunit interface, which is seen to remodel strongly upon rotational movements of the ribosomal subunits. Furthermore, the structure paves the way for analysing antibiotic side effects and diseases associated with deregulated protein synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Khatter, Heena -- Myasnikov, Alexander G -- Natchiar, S Kundhavai -- Klaholz, Bruno P -- England -- Nature. 2015 Apr 30;520(7549):640-5. doi: 10.1038/nature14427. Epub 2015 Apr 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Centre for Integrative Biology (CBI), Department of Integrated Structural Biology, IGBMC (Institute of Genetics and of Molecular and Cellular Biology), 1 rue Laurent Fries, 67404 Illkirch, France [2] Centre National de la Recherche Scientifique (CNRS), UMR 7104, 67404 Illkirch, France [3] Institut National de la Sante et de la Recherche Medicale (INSERM) U964, 67404 Illkirch, France [4] Universite de Strasbourg, 67081 Strasbourg, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25901680" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; *Cryoelectron Microscopy ; Electrons ; Humans ; Models, Molecular ; RNA, Ribosomal/chemistry/metabolism/ultrastructure ; RNA, Transfer/chemistry/metabolism/ultrastructure ; Ribosomal Proteins/chemistry/metabolism/ultrastructure ; Ribosome Subunits/chemistry/metabolism/ultrastructure ; Ribosomes/*chemistry/metabolism/*ultrastructure
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  • 34
    Publication Date: 2015-03-31
    Description: In response to adenosine 5'-diphosphate, the P2Y1 receptor (P2Y1R) facilitates platelet aggregation, and thus serves as an important antithrombotic drug target. Here we report the crystal structures of the human P2Y1R in complex with a nucleotide antagonist MRS2500 at 2.7 A resolution, and with a non-nucleotide antagonist BPTU at 2.2 A resolution. The structures reveal two distinct ligand-binding sites, providing atomic details of P2Y1R's unique ligand-binding modes. MRS2500 recognizes a binding site within the seven transmembrane bundle of P2Y1R, which is different in shape and location from the nucleotide binding site in the previously determined structure of P2Y12R, representative of another P2YR subfamily. BPTU binds to an allosteric pocket on the external receptor interface with the lipid bilayer, making it the first structurally characterized selective G-protein-coupled receptor (GPCR) ligand located entirely outside of the helical bundle. These high-resolution insights into P2Y1R should enable discovery of new orthosteric and allosteric antithrombotic drugs with reduced adverse effects.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4408927/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4408927/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Dandan -- Gao, Zhan-Guo -- Zhang, Kaihua -- Kiselev, Evgeny -- Crane, Steven -- Wang, Jiang -- Paoletta, Silvia -- Yi, Cuiying -- Ma, Limin -- Zhang, Wenru -- Han, Gye Won -- Liu, Hong -- Cherezov, Vadim -- Katritch, Vsevolod -- Jiang, Hualiang -- Stevens, Raymond C -- Jacobson, Kenneth A -- Zhao, Qiang -- Wu, Beili -- U54 GM094618/GM/NIGMS NIH HHS/ -- U54GM094618/GM/NIGMS NIH HHS/ -- Z01 DK031116-21/Intramural NIH HHS/ -- Z01DK031116-26/DK/NIDDK NIH HHS/ -- ZIA DK031116-26/Intramural NIH HHS/ -- England -- Nature. 2015 Apr 16;520(7547):317-21. doi: 10.1038/nature14287. Epub 2015 Mar 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China. ; Molecular Recognition Section, Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA. ; Bridge Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA. ; Bridge Institute, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089, USA. ; Drug Discovery and Design Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Pudong, Shanghai 201203, China. ; 1] Bridge Institute, Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA [2] Bridge Institute, Department of Biological Sciences, University of Southern California, Los Angeles, California 90089, USA [3] iHuman Institute, ShanghaiTech University, 99 Haike Road, Pudong, Shanghai 201203, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25822790" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Diphosphate/analogs & derivatives/chemistry/metabolism ; Binding Sites ; Crystallography, X-Ray ; Deoxyadenine Nucleotides/*chemistry/*metabolism/pharmacology ; Humans ; Ligands ; Models, Molecular ; Molecular Conformation ; Purinergic P2Y Receptor Antagonists/*chemistry/metabolism/pharmacology ; Receptors, Purinergic P2Y1/*chemistry/*metabolism ; Thionucleotides/chemistry/metabolism ; Uracil/*analogs & derivatives/chemistry/metabolism/pharmacology
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  • 35
    Publication Date: 2015-08-11
    Description: G-protein-coupled receptors (GPCRs) constitute the largest family of membrane receptors in eukaryotes. Crystal structures have provided insight into GPCR interactions with ligands and G proteins, but our understanding of the conformational dynamics of activation is incomplete. Metabotropic glutamate receptors (mGluRs) are dimeric class C GPCRs that modulate neuronal excitability, synaptic plasticity, and serve as drug targets for neurological disorders. A 'clamshell' ligand-binding domain (LBD), which contains the ligand-binding site, is coupled to the transmembrane domain via a cysteine-rich domain, and LBD closure seems to be the first step in activation. Crystal structures of isolated mGluR LBD dimers led to the suggestion that activation also involves a reorientation of the dimer interface from a 'relaxed' to an 'active' state, but the relationship between ligand binding, LBD closure and dimer interface rearrangement in activation remains unclear. Here we use single-molecule fluorescence resonance energy transfer to probe the activation mechanism of full-length mammalian group II mGluRs. We show that the LBDs interconvert between three conformations: resting, activated and a short-lived intermediate state. Orthosteric agonists induce transitions between these conformational states, with efficacy determined by occupancy of the active conformation. Unlike mGluR2, mGluR3 displays basal dynamics, which are Ca(2+)-dependent and lead to basal protein activation. Our results support a general mechanism for the activation of mGluRs in which agonist binding induces closure of the LBDs, followed by dimer interface reorientation. Our experimental strategy should be widely applicable to study conformational dynamics in GPCRs and other membrane proteins.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4597782/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4597782/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vafabakhsh, Reza -- Levitz, Joshua -- Isacoff, Ehud Y -- 2PN2EY018241/EY/NEI NIH HHS/ -- PN2 EY018241/EY/NEI NIH HHS/ -- England -- Nature. 2015 Aug 27;524(7566):497-501. doi: 10.1038/nature14679. Epub 2015 Aug 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA. ; Helen Wills Neuroscience Institute, University of California, Berkeley, California 94720, USA. ; Physical Bioscience Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26258295" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Drug Partial Agonism ; *Fluorescence Resonance Energy Transfer ; Humans ; Ligands ; Models, Biological ; Models, Molecular ; Protein Binding ; Protein Conformation ; Rats ; Receptors, Metabotropic Glutamate/*chemistry/*classification/genetics/metabolism
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  • 36
    Publication Date: 2015-04-10
    Description: The TRPA1 ion channel (also known as the wasabi receptor) is a detector of noxious chemical agents encountered in our environment or produced endogenously during tissue injury or drug metabolism. These include a broad class of electrophiles that activate the channel through covalent protein modification. TRPA1 antagonists hold potential for treating neurogenic inflammatory conditions provoked or exacerbated by irritant exposure. Despite compelling reasons to understand TRPA1 function, structural mechanisms underlying channel regulation remain obscure. Here we use single-particle electron cryo- microscopy to determine the structure of full-length human TRPA1 to approximately 4 A resolution in the presence of pharmacophores, including a potent antagonist. Several unexpected features are revealed, including an extensive coiled-coil assembly domain stabilized by polyphosphate co-factors and a highly integrated nexus that converges on an unpredicted transient receptor potential (TRP)-like allosteric domain. These findings provide new insights into the mechanisms of TRPA1 regulation, and establish a blueprint for structure-based design of analgesic and anti-inflammatory agents.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4409540/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4409540/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Paulsen, Candice E -- Armache, Jean-Paul -- Gao, Yuan -- Cheng, Yifan -- Julius, David -- R01 GM098672/GM/NIGMS NIH HHS/ -- R01 NS055299/NS/NINDS NIH HHS/ -- R01GM098672/GM/NIGMS NIH HHS/ -- R01NS055299/NS/NINDS NIH HHS/ -- T32 GM008284/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Apr 23;520(7548):511-7. doi: 10.1038/nature14367. Epub 2015 Apr 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of California, San Francisco, California 94158-2517, USA. ; Keck Advanced Microscopy Laboratory, Department of Biochemistry and Biophysics, University of California, San Francisco, California 94158-2517, USA. ; 1] Department of Physiology, University of California, San Francisco, California 94158-2517, USA [2] Keck Advanced Microscopy Laboratory, Department of Biochemistry and Biophysics, University of California, San Francisco, California 94158-2517, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25855297" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Analgesics ; Ankyrin Repeat ; Anti-Inflammatory Agents ; Binding Sites ; Calcium Channels/*chemistry/metabolism/*ultrastructure ; *Cryoelectron Microscopy ; Cytosol/metabolism ; Humans ; Models, Molecular ; Nerve Tissue Proteins/antagonists & ; inhibitors/*chemistry/metabolism/*ultrastructure ; Polyphosphates/metabolism/pharmacology ; Protein Stability/drug effects ; Protein Subunits/chemistry/metabolism ; Structure-Activity Relationship ; Transient Receptor Potential Channels/antagonists & ; inhibitors/*chemistry/metabolism/*ultrastructure
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  • 37
    Publication Date: 2015-09-08
    Description: During eukaryotic translation initiation, 43S complexes, comprising a 40S ribosomal subunit, initiator transfer RNA and initiation factors (eIF) 2, 3, 1 and 1A, attach to the 5'-terminal region of messenger RNA and scan along it to the initiation codon. Scanning on structured mRNAs also requires the DExH-box protein DHX29. Mammalian eIF3 contains 13 subunits and participates in nearly all steps of translation initiation. Eight subunits having PCI (proteasome, COP9 signalosome, eIF3) or MPN (Mpr1, Pad1, amino-terminal) domains constitute the structural core of eIF3, to which five peripheral subunits are flexibly linked. Here we present a cryo-electron microscopy structure of eIF3 in the context of the DHX29-bound 43S complex, showing the PCI/MPN core at approximately 6 A resolution. It reveals the organization of the individual subunits and their interactions with components of the 43S complex. We were able to build near-complete polyalanine-level models of the eIF3 PCI/MPN core and of two peripheral subunits. The implications for understanding mRNA ribosomal attachment and scanning are discussed.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4719162/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4719162/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉des Georges, Amedee -- Dhote, Vidya -- Kuhn, Lauriane -- Hellen, Christopher U T -- Pestova, Tatyana V -- Frank, Joachim -- Hashem, Yaser -- R01 GM029169/GM/NIGMS NIH HHS/ -- R01 GM059660/GM/NIGMS NIH HHS/ -- R01 GM29169/GM/NIGMS NIH HHS/ -- R01 GM59660/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Sep 24;525(7570):491-5. doi: 10.1038/nature14891. Epub 2015 Sep 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉HHMI, Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032, USA. ; Department of Cell Biology, SUNY Downstate Medical Center, Brooklyn, New York 11203, USA. ; CNRS, Proteomic Platform Strasbourg - Esplanade, Strasbourg 67084, France. ; Department of Biological Sciences, Columbia University, New York, New York 10032, USA. ; CNRS, Architecture et Reactivite de l'ARN, Universite de Strasbourg, Strasbourg 67084, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26344199" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Codon, Initiator/genetics ; Cryoelectron Microscopy ; Eukaryotic Initiation Factor-2/chemistry/metabolism ; Eukaryotic Initiation Factor-3/*chemistry/*metabolism ; Humans ; Models, Molecular ; Multiprotein Complexes/*chemistry/*metabolism ; *Peptide Chain Initiation, Translational ; Peptide Initiation Factors/metabolism ; Protein Structure, Secondary ; Protein Subunits/chemistry/metabolism ; RNA Helicases/chemistry/metabolism ; RNA, Messenger/genetics/metabolism ; RNA, Transfer, Met/metabolism ; Ribosome Subunits, Small, Eukaryotic/chemistry/metabolism ; Ribosomes/*chemistry/*metabolism
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  • 38
    Publication Date: 2015-02-25
    Description: V(D)J recombination in the vertebrate immune system generates a highly diverse population of immunoglobulins and T-cell receptors by combinatorial joining of segments of coding DNA. The RAG1-RAG2 protein complex initiates this site-specific recombination by cutting DNA at specific sites flanking the coding segments. Here we report the crystal structure of the mouse RAG1-RAG2 complex at 3.2 A resolution. The 230-kilodalton RAG1-RAG2 heterotetramer is 'Y-shaped', with the amino-terminal domains of the two RAG1 chains forming an intertwined stalk. Each RAG1-RAG2 heterodimer composes one arm of the 'Y', with the active site in the middle and RAG2 at its tip. The RAG1-RAG2 structure rationalizes more than 60 mutations identified in immunodeficient patients, as well as a large body of genetic and biochemical data. The architectural similarity between RAG1 and the hairpin-forming transposases Hermes and Tn5 suggests the evolutionary conservation of these DNA rearrangements.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4342785/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4342785/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Min-Sung -- Lapkouski, Mikalai -- Yang, Wei -- Gellert, Martin -- Z01 DK036147-01/Intramural NIH HHS/ -- Z01 DK036147-02/Intramural NIH HHS/ -- Z01 DK036167-01/Intramural NIH HHS/ -- Z01 DK036167-02/Intramural NIH HHS/ -- ZIA DK036147-03/Intramural NIH HHS/ -- ZIA DK036147-04/Intramural NIH HHS/ -- ZIA DK036147-05/Intramural NIH HHS/ -- ZIA DK036147-06/Intramural NIH HHS/ -- ZIA DK036147-07/Intramural NIH HHS/ -- ZIA DK036147-08/Intramural NIH HHS/ -- ZIA DK036167-03/Intramural NIH HHS/ -- ZIA DK036167-04/Intramural NIH HHS/ -- ZIA DK036167-05/Intramural NIH HHS/ -- ZIA DK036167-06/Intramural NIH HHS/ -- ZIA DK036167-07/Intramural NIH HHS/ -- England -- Nature. 2015 Feb 26;518(7540):507-11. doi: 10.1038/nature14174. Epub 2015 Feb 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, NIDDK, NIH, Bethesda, Maryland 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25707801" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Crystallography, X-Ray ; DNA/chemistry/metabolism ; DNA-Binding Proteins/*chemistry/genetics/metabolism ; Homeodomain Proteins/*chemistry/genetics/metabolism ; Humans ; Mice ; Models, Molecular ; Mutation/genetics ; Protein Multimerization ; Protein Structure, Quaternary ; Severe Combined Immunodeficiency/genetics ; Transposases/chemistry ; VDJ Recombinases/*chemistry/metabolism ; X-Linked Combined Immunodeficiency Diseases/genetics
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  • 39
    Publication Date: 2015-07-23
    Description: The human lens is comprised largely of crystallin proteins assembled into a highly ordered, interactive macro-structure essential for lens transparency and refractive index. Any disruption of intra- or inter-protein interactions will alter this delicate structure, exposing hydrophobic surfaces, with consequent protein aggregation and cataract formation. Cataracts are the most common cause of blindness worldwide, affecting tens of millions of people, and currently the only treatment is surgical removal of cataractous lenses. The precise mechanisms by which lens proteins both prevent aggregation and maintain lens transparency are largely unknown. Lanosterol is an amphipathic molecule enriched in the lens. It is synthesized by lanosterol synthase (LSS) in a key cyclization reaction of a cholesterol synthesis pathway. Here we identify two distinct homozygous LSS missense mutations (W581R and G588S) in two families with extensive congenital cataracts. Both of these mutations affect highly conserved amino acid residues and impair key catalytic functions of LSS. Engineered expression of wild-type, but not mutant, LSS prevents intracellular protein aggregation of various cataract-causing mutant crystallins. Treatment by lanosterol, but not cholesterol, significantly decreased preformed protein aggregates both in vitro and in cell-transfection experiments. We further show that lanosterol treatment could reduce cataract severity and increase transparency in dissected rabbit cataractous lenses in vitro and cataract severity in vivo in dogs. Our study identifies lanosterol as a key molecule in the prevention of lens protein aggregation and points to a novel strategy for cataract prevention and treatment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhao, Ling -- Chen, Xiang-Jun -- Zhu, Jie -- Xi, Yi-Bo -- Yang, Xu -- Hu, Li-Dan -- Ouyang, Hong -- Patel, Sherrina H -- Jin, Xin -- Lin, Danni -- Wu, Frances -- Flagg, Ken -- Cai, Huimin -- Li, Gen -- Cao, Guiqun -- Lin, Ying -- Chen, Daniel -- Wen, Cindy -- Chung, Christopher -- Wang, Yandong -- Qiu, Austin -- Yeh, Emily -- Wang, Wenqiu -- Hu, Xun -- Grob, Seanna -- Abagyan, Ruben -- Su, Zhiguang -- Tjondro, Harry Christianto -- Zhao, Xi-Juan -- Luo, Hongrong -- Hou, Rui -- Perry, J Jefferson P -- Gao, Weiwei -- Kozak, Igor -- Granet, David -- Li, Yingrui -- Sun, Xiaodong -- Wang, Jun -- Zhang, Liangfang -- Liu, Yizhi -- Yan, Yong-Bin -- Zhang, Kang -- England -- Nature. 2015 Jul 30;523(7562):607-11. doi: 10.1038/nature14650. Epub 2015 Jul 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China [2] State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China [3] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA. ; State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China. ; 1] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA [2] Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China. ; BGI-Shenzhen, Shenzhen 518083, China. ; 1] State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China [2] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA. ; Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA. ; 1] Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China [2] Guangzhou KangRui Biological Pharmaceutical Technology Company, Guangzhou 510005, China. ; Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China. ; State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. ; 1] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA [2] CapitalBio Genomics Co., Ltd., Dongguan 523808, China. ; 1] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA [2] Department of Ophthalmology, Shanghai First People's Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai 20080, China. ; Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, USA. ; Guangzhou KangRui Biological Pharmaceutical Technology Company, Guangzhou 510005, China. ; Department of Biochemistry, University of California Riverside, Riverside, California 92521, USA. ; 1] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA [2] Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA. ; King Khaled Eye Specialist Hospital, Riyadh, Kingdom of Saudi Arabia. ; Department of Ophthalmology, Shanghai First People's Hospital, School of Medicine, Shanghai JiaoTong University, Shanghai 20080, China. ; Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China. ; 1] Molecular Medicine Research Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China [2] State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China [3] Department of Ophthalmology and Biomaterials and Tissue Engineering Center, Institute for Engineering in Medicine, University of California San Diego, La Jolla, California 92093, USA [4] Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA [5] Veterans Administration Healthcare System, San Diego, California 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26200341" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Amino Acid Sequence ; Amyloid/chemistry/drug effects/metabolism/ultrastructure ; Animals ; Base Sequence ; Cataract/congenital/*drug therapy/genetics/*metabolism/pathology ; Cell Line ; Child ; Crystallins/chemistry/genetics/metabolism/ultrastructure ; Dogs ; Female ; Humans ; Lanosterol/administration & dosage/*pharmacology/*therapeutic use ; Lens, Crystalline/drug effects/metabolism/pathology ; Male ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry/genetics/metabolism/ultrastructure ; Pedigree ; Protein Aggregates/*drug effects ; Protein Aggregation, Pathological/*drug therapy/pathology
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  • 40
    Publication Date: 2015-08-19
    Description: Phosphorus is required for all life and microorganisms can extract it from their environment through several metabolic pathways. When phosphate is in limited supply, some bacteria are able to use phosphonate compounds, which require specialized enzymatic machinery to break the stable carbon-phosphorus (C-P) bond. Despite its importance, the details of how this machinery catabolizes phosphonates remain unknown. Here we determine the crystal structure of the 240-kilodalton Escherichia coli C-P lyase core complex (PhnG-PhnH-PhnI-PhnJ; PhnGHIJ), and show that it is a two-fold symmetric hetero-octamer comprising an intertwined network of subunits with unexpected self-homologies. It contains two potential active sites that probably couple phosphonate compounds to ATP and subsequently hydrolyse the C-P bond. We map the binding site of PhnK on the complex using electron microscopy, and show that it binds to a conserved insertion domain of PhnJ. Our results provide a structural basis for understanding microbial phosphonate breakdown.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4617613/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4617613/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seweryn, Paulina -- Van, Lan Bich -- Kjeldgaard, Morten -- Russo, Christopher J -- Passmore, Lori A -- Hove-Jensen, Bjarne -- Jochimsen, Bjarne -- Brodersen, Ditlev E -- MC_U105192715/Medical Research Council/United Kingdom -- England -- Nature. 2015 Sep 3;525(7567):68-72. doi: 10.1038/nature14683. Epub 2015 Aug 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10c, DK-8000 Aarhus C, Denmark. ; Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26280334" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Binding Sites ; Biocatalysis ; Carbon/chemistry/metabolism ; Conserved Sequence ; Crystallography, X-Ray ; Escherichia coli/*enzymology ; Escherichia coli Proteins/*chemistry/*metabolism/ultrastructure ; Hydrolysis ; Iron/chemistry/metabolism ; Lyases/*chemistry/*metabolism/ultrastructure ; Microscopy, Electron ; Models, Molecular ; Organophosphonates/metabolism ; Phosphorus/chemistry/metabolism ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Sulfur/chemistry/metabolism
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  • 41
    Publication Date: 2015-09-30
    Description: Nuclear pore complexes are fundamental components of all eukaryotic cells that mediate nucleocytoplasmic exchange. Determining their 110-megadalton structure imposes a formidable challenge and requires in situ structural biology approaches. Of approximately 30 nucleoporins (Nups), 15 are structured and form the Y and inner-ring complexes. These two major scaffolding modules assemble in multiple copies into an eight-fold rotationally symmetric structure that fuses the inner and outer nuclear membranes to form a central channel of ~60 nm in diameter. The scaffold is decorated with transport-channel Nups that often contain phenylalanine-repeat sequences and mediate the interaction with cargo complexes. Although the architectural arrangement of parts of the Y complex has been elucidated, it is unclear how exactly it oligomerizes in situ. Here we combine cryo-electron tomography with mass spectrometry, biochemical analysis, perturbation experiments and structural modelling to generate, to our knowledge, the most comprehensive architectural model of the human nuclear pore complex to date. Our data suggest previously unknown protein interfaces across Y complexes and to inner-ring complex members. We show that the transport-channel Nup358 (also known as Ranbp2) has a previously unanticipated role in Y-complex oligomerization. Our findings blur the established boundaries between scaffold and transport-channel Nups. We conclude that, similar to coated vesicles, several copies of the same structural building block--although compositionally identical--engage in different local sets of interactions and conformations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉von Appen, Alexander -- Kosinski, Jan -- Sparks, Lenore -- Ori, Alessandro -- DiGuilio, Amanda L -- Vollmer, Benjamin -- Mackmull, Marie-Therese -- Banterle, Niccolo -- Parca, Luca -- Kastritis, Panagiotis -- Buczak, Katarzyna -- Mosalaganti, Shyamal -- Hagen, Wim -- Andres-Pons, Amparo -- Lemke, Edward A -- Bork, Peer -- Antonin, Wolfram -- Glavy, Joseph S -- Bui, Khanh Huy -- Beck, Martin -- 1R21AG047433-01/AG/NIA NIH HHS/ -- England -- Nature. 2015 Oct 1;526(7571):140-3. doi: 10.1038/nature15381. Epub 2015 Sep 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory, Structural and Computational Biology Unit, 69117 Heidelberg, Germany. ; Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, 507 River St., Hoboken, New Jersey 07030, USA. ; Friedrich Miescher Laboratory of the Max Planck Society, Spemannstrasse 39, 72076 Tubingen, Germany. ; Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26416747" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; *Cryoelectron Microscopy ; HeLa Cells ; Humans ; Mass Spectrometry ; Models, Molecular ; Molecular Chaperones/chemistry/metabolism/ultrastructure ; Nuclear Envelope/metabolism ; Nuclear Pore/*chemistry/metabolism/*ultrastructure ; Nuclear Pore Complex Proteins/*chemistry/metabolism/*ultrastructure ; Protein Conformation ; Protein Multimerization ; Protein Stability
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  • 42
    Publication Date: 2015-07-30
    Description: DNA replication in eukaryotes is strictly regulated by several mechanisms. A central step in this replication is the assembly of the heterohexameric minichromosome maintenance (MCM2-7) helicase complex at replication origins during G1 phase as an inactive double hexamer. Here, using cryo-electron microscopy, we report a near-atomic structure of the MCM2-7 double hexamer purified from yeast G1 chromatin. Our structure shows that two single hexamers, arranged in a tilted and twisted fashion through interdigitated amino-terminal domain interactions, form a kinked central channel. Four constricted rings consisting of conserved interior beta-hairpins from the two single hexamers create a narrow passageway that tightly fits duplex DNA. This narrow passageway, reinforced by the offset of the two single hexamers at the double hexamer interface, is flanked by two pairs of gate-forming subunits, MCM2 and MCM5. These unusual features of the twisted and tilted single hexamers suggest a concerted mechanism for the melting of origin DNA that requires structural deformation of the intervening DNA.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Ningning -- Zhai, Yuanliang -- Zhang, Yixiao -- Li, Wanqiu -- Yang, Maojun -- Lei, Jianlin -- Tye, Bik-Kwoon -- Gao, Ning -- England -- Nature. 2015 Aug 13;524(7564):186-91. doi: 10.1038/nature14685. Epub 2015 Jul 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ministry of Education Key Laboratory of Protein Sciences, Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China. ; 1] Division of Life Science, Hong Kong Universityof Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China [2] Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. ; 1] Division of Life Science, Hong Kong Universityof Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China [2] Department of Molecular Biology and Genetics, College of Agriculture and Life Sciences, Cornell University, Ithaca, New York 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26222030" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Cell Cycle Proteins/chemistry/metabolism/ultrastructure ; Chromatin/chemistry ; Conserved Sequence ; *Cryoelectron Microscopy ; DNA/chemistry/metabolism/ultrastructure ; DNA-Directed DNA Polymerase/chemistry/ultrastructure ; G1 Phase ; Minichromosome Maintenance Proteins/*chemistry/metabolism/*ultrastructure ; Models, Biological ; Models, Molecular ; Multienzyme Complexes/chemistry/ultrastructure ; Nucleic Acid Denaturation ; Protein Binding ; Protein Multimerization ; Protein Structure, Tertiary ; Protein Subunits/*chemistry/metabolism ; Replication Origin ; Saccharomyces cerevisiae/*chemistry/*ultrastructure ; Saccharomyces cerevisiae Proteins/chemistry/metabolism/ultrastructure
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  • 43
    Publication Date: 2015-04-10
    Description: The main organelles of the secretory and endocytic pathways--the endoplasmic reticulum (ER) and endosomes, respectively--are connected through contact sites whose numbers increase as endosomes mature. One function of such sites is to enable dephosphorylation of the cytosolic tails of endosomal signalling receptors by an ER-associated phosphatase, whereas others serve to negatively control the association of endosomes with the minus-end-directed microtubule motor dynein or mediate endosome fission. Cholesterol transfer and Ca(2+) exchange have been proposed as additional functions of such sites. However, the compositions, activities and regulations of ER-endosome contact sites remain incompletely understood. Here we show in human and rat cell lines that protrudin, an ER protein that promotes protrusion and neurite outgrowth, forms contact sites with late endosomes (LEs) via coincident detection of the small GTPase RAB7 and phosphatidylinositol 3-phosphate (PtdIns(3)P). These contact sites mediate transfer of the microtubule motor kinesin 1 from protrudin to the motor adaptor FYCO1 on LEs. Repeated LE-ER contacts promote microtubule-dependent translocation of LEs to the cell periphery and subsequent synaptotagmin-VII-dependent fusion with the plasma membrane. Such fusion induces outgrowth of protrusions and neurites, which requires the abilities of protrudin and FYCO1 to interact with LEs and kinesin 1. Thus, protrudin-containing ER-LE contact sites are platforms for kinesin-1 loading onto LEs, and kinesin-1-mediated translocation of LEs to the plasma membrane, fuelled by repeated ER contacts, promotes protrusion and neurite outgrowth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Raiborg, Camilla -- Wenzel, Eva M -- Pedersen, Nina M -- Olsvik, Hallvard -- Schink, Kay O -- Schultz, Sebastian W -- Vietri, Marina -- Nisi, Veronica -- Bucci, Cecilia -- Brech, Andreas -- Johansen, Terje -- Stenmark, Harald -- England -- Nature. 2015 Apr 9;520(7546):234-8. doi: 10.1038/nature14359.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, Montebello, N-0379 Oslo, Norway [2] Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital, Montebello, N-0379 Oslo, Norway. ; Institute of Medical Biology, University of Tromso - The Arctic University of Norway, N-9037 Tromso, Norway. ; Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Monteroni 165, 73100 Lecce, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25855459" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Biological Transport ; Cell Line ; Cell Membrane/metabolism ; DNA-Binding Proteins/metabolism ; Endoplasmic Reticulum/*metabolism ; Endosomes/*metabolism ; HeLa Cells ; Humans ; Kinesin/metabolism ; Microtubules/metabolism ; Neurites/*metabolism ; Phosphatidylinositol Phosphates/metabolism ; Rats ; Synaptotagmins/metabolism ; Transcription Factors/metabolism ; Vesicular Transport Proteins/metabolism ; rab GTP-Binding Proteins/metabolism
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  • 44
    Publication Date: 2015-08-19
    Description: Dysfunction of the intramembrane protease gamma-secretase is thought to cause Alzheimer's disease, with most mutations derived from Alzheimer's disease mapping to the catalytic subunit presenilin 1 (PS1). Here we report an atomic structure of human gamma-secretase at 3.4 A resolution, determined by single-particle cryo-electron microscopy. Mutations derived from Alzheimer's disease affect residues at two hotspots in PS1, each located at the centre of a distinct four transmembrane segment (TM) bundle. TM2 and, to a lesser extent, TM6 exhibit considerable flexibility, yielding a plastic active site and adaptable surrounding elements. The active site of PS1 is accessible from the convex side of the TM horseshoe, suggesting considerable conformational changes in nicastrin extracellular domain after substrate recruitment. Component protein APH-1 serves as a scaffold, anchoring the lone transmembrane helix from nicastrin and supporting the flexible conformation of PS1. Ordered phospholipids stabilize the complex inside the membrane. Our structure serves as a molecular basis for mechanistic understanding of gamma-secretase function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4568306/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4568306/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bai, Xiao-chen -- Yan, Chuangye -- Yang, Guanghui -- Lu, Peilong -- Ma, Dan -- Sun, Linfeng -- Zhou, Rui -- Scheres, Sjors H W -- Shi, Yigong -- MC_UP_A025_101/Medical Research Council/United Kingdom -- MC_UP_A025_1013/Medical Research Council/United Kingdom -- England -- Nature. 2015 Sep 10;525(7568):212-7. doi: 10.1038/nature14892. Epub 2015 Aug 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK. ; Ministry of Education Key Laboratory of Protein Science, Tsinghua-Peking Joint Center for Life Sciences, Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26280335" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/genetics ; Amyloid Precursor Protein ; Secretases/*chemistry/genetics/metabolism/*ultrastructure ; Binding Sites ; *Cryoelectron Microscopy ; Humans ; Membrane Glycoproteins/*chemistry/metabolism/*ultrastructure ; Models, Molecular ; Mutation ; Presenilin-1/*chemistry/genetics/*ultrastructure ; Protein Structure, Tertiary ; Protein Subunits/chemistry/genetics/metabolism
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  • 45
    Publication Date: 2015-08-08
    Description: micro-Opioid receptors (microORs) are G-protein-coupled receptors that are activated by a structurally diverse spectrum of natural and synthetic agonists including endogenous endorphin peptides, morphine and methadone. The recent structures of the muOR in inactive and agonist-induced active states (Huang et al., ref. 2) provide snapshots of the receptor at the beginning and end of a signalling event, but little is known about the dynamic sequence of events that span these two states. Here we use solution-state NMR to examine the process of muOR activation using a purified receptor (mouse sequence) preparation in an amphiphile membrane-like environment. We obtain spectra of the muOR in the absence of ligand, and in the presence of the high-affinity agonist BU72 alone, or with BU72 and a G protein mimetic nanobody. Our results show that conformational changes in transmembrane segments 5 and 6 (TM5 and TM6), which are required for the full engagement of a G protein, are almost completely dependent on the presence of both the agonist and the G protein mimetic nanobody, revealing a weak allosteric coupling between the agonist-binding pocket and the G-protein-coupling interface (TM5 and TM6), similar to that observed for the beta2-adrenergic receptor. Unexpectedly, in the presence of agonist alone, we find larger spectral changes involving intracellular loop 1 and helix 8 compared to changes in TM5 and TM6. These results suggest that one or both of these domains may play a role in the initial interaction with the G protein, and that TM5 and TM6 are only engaged later in the process of complex formation. The initial interactions between the G protein and intracellular loop 1 and/or helix 8 may be involved in G-protein coupling specificity, as has been suggested for other family A G-protein-coupled receptors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sounier, Remy -- Mas, Camille -- Steyaert, Jan -- Laeremans, Toon -- Manglik, Aashish -- Huang, Weijiao -- Kobilka, Brian K -- Demene, Helene -- Granier, Sebastien -- DA036246/DA/NIDA NIH HHS/ -- R37 DA036246/DA/NIDA NIH HHS/ -- T32 GM008294/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Aug 20;524(7565):375-8. doi: 10.1038/nature14680. Epub 2015 Aug 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut de Genomique Fonctionnelle, CNRS UMR-5203 INSERM U1191, University of Montpellier, F-34000 Montpellier, France. ; Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium. ; Structural Biology Research Center, VIB, Pleinlaan 2, B-1050 Brussels, Belgium. ; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, California 94305, USA. ; Centre de Biochimie Structurale, CNRS UMR 5048-INSERM 1054- University of Montpellier, 29 rue de Navacelles, 34090 Montpellier Cedex, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26245377" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Animals ; Binding Sites ; Heterotrimeric GTP-Binding Proteins/metabolism ; Lysine/metabolism ; Mice ; Models, Molecular ; Morphinans/chemistry/metabolism/pharmacology ; Nuclear Magnetic Resonance, Biomolecular ; Protein Binding ; Protein Conformation/drug effects ; Pyrroles/chemistry/metabolism/pharmacology ; Receptors, Adrenergic, beta-2/chemistry ; Receptors, Opioid, mu/*chemistry/*metabolism ; Single-Chain Antibodies/chemistry/metabolism/pharmacology ; Structure-Activity Relationship ; Substrate Specificity
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  • 46
    Publication Date: 2015-06-23
    Description: Stearoyl-CoA desaturase (SCD) is conserved in all eukaryotes and introduces the first double bond into saturated fatty acyl-CoAs. Because the monounsaturated products of SCD are key precursors of membrane phospholipids, cholesterol esters and triglycerides, SCD is pivotal in fatty acid metabolism. Humans have two SCD homologues (SCD1 and SCD5), while mice have four (SCD1-SCD4). SCD1-deficient mice do not become obese or diabetic when fed a high-fat diet because of improved lipid metabolic profiles and insulin sensitivity. Thus, SCD1 is a pharmacological target in the treatment of obesity, diabetes and other metabolic diseases. SCD1 is an integral membrane protein located in the endoplasmic reticulum, and catalyses the formation of a cis-double bond between the ninth and tenth carbons of stearoyl- or palmitoyl-CoA. The reaction requires molecular oxygen, which is activated by a di-iron centre, and cytochrome b5, which regenerates the di-iron centre. To understand better the structural basis of these characteristics of SCD function, here we crystallize and solve the structure of mouse SCD1 bound to stearoyl-CoA at 2.6 A resolution. The structure shows a novel fold comprising four transmembrane helices capped by a cytosolic domain, and a plausible pathway for lateral substrate access and product egress. The acyl chain of the bound stearoyl-CoA is enclosed in a tunnel buried in the cytosolic domain, and the geometry of the tunnel and the conformation of the bound acyl chain provide a structural basis for the regioselectivity and stereospecificity of the desaturation reaction. The dimetal centre is coordinated by a unique spacial arrangement of nine conserved histidine residues that implies a potentially novel mechanism for oxygen activation. The structure also illustrates a possible route for electron transfer from cytochrome b5 to the di-iron centre.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689147/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689147/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bai, Yonghong -- McCoy, Jason G -- Levin, Elena J -- Sobrado, Pablo -- Rajashankar, Kanagalaghatta R -- Fox, Brian G -- Zhou, Ming -- P41 GM103403/GM/NIGMS NIH HHS/ -- P41GM103403/GM/NIGMS NIH HHS/ -- R01 DK088057/DK/NIDDK NIH HHS/ -- R01 GM098878/GM/NIGMS NIH HHS/ -- R01 HL086392/HL/NHLBI NIH HHS/ -- R01DK088057/DK/NIDDK NIH HHS/ -- R01GM050853/GM/NIGMS NIH HHS/ -- R01GM098878/GM/NIGMS NIH HHS/ -- R01HL086392/HL/NHLBI NIH HHS/ -- U54 GM094584/GM/NIGMS NIH HHS/ -- U54GM094584/GM/NIGMS NIH HHS/ -- U54GM095315/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Aug 13;524(7564):252-6. doi: 10.1038/nature14549. Epub 2015 Jun 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas 77030, USA. ; Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA. ; NE-CAT and Department of Chemistry and Chemical Biology, Cornell University, Argonne National Laboratory, Argonne, Illinois 60439, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26098370" target="_blank"〉PubMed〈/a〉
    Keywords: Acyl Coenzyme A/chemistry/metabolism ; Animals ; Binding Sites ; Crystallography, X-Ray ; Cytochromes b5/chemistry/metabolism ; Electron Transport ; Histidine/chemistry/metabolism ; Iron/metabolism ; Mice ; Models, Molecular ; Oxygen/metabolism ; Protein Structure, Tertiary ; Static Electricity ; Stearoyl-CoA Desaturase/*chemistry/metabolism ; Structure-Activity Relationship
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  • 47
    Publication Date: 2015-10-06
    Description: Na(+)-activated K(+) channels are members of the Slo family of large conductance K(+) channels that are widely expressed in the brain, where their opening regulates neuronal excitability. These channels fulfil a number of biological roles and have intriguing biophysical properties, including conductance levels that are ten times those of most other K(+) channels and gating sensitivity to intracellular Na(+). Here we present the structure of a complete Na(+)-activated K(+) channel, chicken Slo2.2, in the Na(+)-free state, determined by cryo-electron microscopy at a nominal resolution of 4.5 angstroms. The channel is composed of a large cytoplasmic gating ring, in which resides the Na(+)-binding site and a transmembrane domain that closely resembles voltage-gated K(+) channels. In the structure, the cytoplasmic domain adopts a closed conformation and the ion conduction pore is also closed. The structure reveals features that can explain the unusually high conductance of Slo channels and how contraction of the cytoplasmic gating ring closes the pore.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hite, Richard K -- Yuan, Peng -- Li, Zongli -- Hsuing, Yichun -- Walz, Thomas -- MacKinnon, Roderick -- GM43949/GM/NIGMS NIH HHS/ -- R01 GM043949/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Nov 12;527(7577):198-203. doi: 10.1038/nature14958. Epub 2015 Oct 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rockefeller University and Howard Hughes Medical Institute, 1230 York Avenue, New York, New York 10065, USA. ; Department of Cell Biology and Howard Hughes Medical Institute, Harvard Medical School, 240 Longwood Avenue, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26436452" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; *Chickens ; *Cryoelectron Microscopy ; Cytoplasm/metabolism ; Electric Conductivity ; Ion Channel Gating ; Ion Transport ; Models, Molecular ; Potassium Channels/chemistry/metabolism/*ultrastructure ; Protein Structure, Tertiary ; Sodium/metabolism ; Structure-Activity Relationship
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  • 48
    Publication Date: 2015-10-28
    Description: Negative-sense RNA viruses, such as influenza, encode large, multidomain RNA-dependent RNA polymerases that can both transcribe and replicate the viral RNA genome. In influenza virus, the polymerase (FluPol) is composed of three polypeptides: PB1, PB2 and PA/P3. PB1 houses the polymerase active site, whereas PB2 and PA/P3 contain, respectively, cap-binding and endonuclease domains required for transcription initiation by cap-snatching. Replication occurs through de novo initiation and involves a complementary RNA intermediate. Currently available structures of the influenza A and B virus polymerases include promoter RNA (the 5' and 3' termini of viral genome segments), showing FluPol in transcription pre-initiation states. Here we report the structure of apo-FluPol from an influenza C virus, solved by X-ray crystallography to 3.9 A, revealing a new 'closed' conformation. The apo-FluPol forms a compact particle with PB1 at its centre, capped on one face by PB2 and clamped between the two globular domains of P3. Notably, this structure is radically different from those of promoter-bound FluPols. The endonuclease domain of P3 and the domains within the carboxy-terminal two-thirds of PB2 are completely rearranged. The cap-binding site is occluded by PB2, resulting in a conformation that is incompatible with transcription initiation. Thus, our structure captures FluPol in a closed, transcription pre-activation state. This reveals the conformation of newly made apo-FluPol in an infected cell, but may also apply to FluPol in the context of a non-transcribing ribonucleoprotein complex. Comparison of the apo-FluPol structure with those of promoter-bound FluPols allows us to propose a mechanism for FluPol activation. Our study demonstrates the remarkable flexibility of influenza virus RNA polymerase, and aids our understanding of the mechanisms controlling transcription and genome replication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hengrung, Narin -- El Omari, Kamel -- Serna Martin, Itziar -- Vreede, Frank T -- Cusack, Stephen -- Rambo, Robert P -- Vonrhein, Clemens -- Bricogne, Gerard -- Stuart, David I -- Grimes, Jonathan M -- Fodor, Ervin -- 075491/Z/04/Wellcome Trust/United Kingdom -- 092931/Z/10/Z/Wellcome Trust/United Kingdom -- G1000099/Medical Research Council/United Kingdom -- G1100138/Medical Research Council/United Kingdom -- MR/K000241/1/Medical Research Council/United Kingdom -- England -- Nature. 2015 Nov 5;527(7576):114-7. doi: 10.1038/nature15525. Epub 2015 Oct 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK. ; Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, University of Oxford, Oxford OX3 7BN, UK. ; European Molecular Biology Laboratory, Grenoble Outstation and University Grenoble Alpes-Centre National de la Recherche Scientifique-EMBL Unit of Virus Host-Cell Interactions, 71 Avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France. ; Diamond Light Source Ltd, Harwell Science &Innovation Campus, Didcot OX11 0DE, UK. ; Global Phasing Ltd, Sheraton House, Castle Park, Cambridge CB3 0AX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26503046" target="_blank"〉PubMed〈/a〉
    Keywords: Apoenzymes/chemistry/metabolism ; Binding Sites ; Crystallography, X-Ray ; Endonucleases/chemistry/metabolism ; Enzyme Activation ; Influenzavirus C/*enzymology ; Models, Molecular ; Peptide Chain Initiation, Translational ; Promoter Regions, Genetic/genetics ; Protein Binding ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; RNA Caps/metabolism ; RNA Replicase/*chemistry/metabolism ; RNA, Viral/biosynthesis/metabolism ; Ribonucleoproteins/chemistry
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  • 49
    Publication Date: 2015-03-25
    Description: Visualizing the physical basis for molecular behaviour inside living cells is a great challenge for biology. RNAs are central to biological regulation, and the ability of RNA to adopt specific structures intimately controls every step of the gene expression program. However, our understanding of physiological RNA structures is limited; current in vivo RNA structure profiles include only two of the four nucleotides that make up RNA. Here we present a novel biochemical approach, in vivo click selective 2'-hydroxyl acylation and profiling experiment (icSHAPE), which enables the first global view, to our knowledge, of RNA secondary structures in living cells for all four bases. icSHAPE of the mouse embryonic stem cell transcriptome versus purified RNA folded in vitro shows that the structural dynamics of RNA in the cellular environment distinguish different classes of RNAs and regulatory elements. Structural signatures at translational start sites and ribosome pause sites are conserved from in vitro conditions, suggesting that these RNA elements are programmed by sequence. In contrast, focal structural rearrangements in vivo reveal precise interfaces of RNA with RNA-binding proteins or RNA-modification sites that are consistent with atomic-resolution structural data. Such dynamic structural footprints enable accurate prediction of RNA-protein interactions and N(6)-methyladenosine (m(6)A) modification genome wide. These results open the door for structural genomics of RNA in living cells and reveal key physiological structures controlling gene expression.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4376618/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4376618/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spitale, Robert C -- Flynn, Ryan A -- Zhang, Qiangfeng Cliff -- Crisalli, Pete -- Lee, Byron -- Jung, Jong-Wha -- Kuchelmeister, Hannes Y -- Batista, Pedro J -- Torre, Eduardo A -- Kool, Eric T -- Chang, Howard Y -- F30 CA189514/CA/NCI NIH HHS/ -- F30CA189514/CA/NCI NIH HHS/ -- P50 HG007735/HG/NHGRI NIH HHS/ -- P50HG007735/HG/NHGRI NIH HHS/ -- R01 HG004361/HG/NHGRI NIH HHS/ -- R01HG004361/HG/NHGRI NIH HHS/ -- T32 CA009302/CA/NCI NIH HHS/ -- T32AR007422/AR/NIAMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Mar 26;519(7544):486-90. doi: 10.1038/nature14263. Epub 2015 Mar 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Program in Epithelial Biology, Stanford University School of Medicine, Stanford, California 94305, USA. ; Department of Chemistry, Stanford University, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25799993" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; Adenosine/analogs & derivatives ; Animals ; Binding Sites ; Cell Survival ; Click Chemistry ; Computational Biology ; Embryonic Stem Cells/cytology/metabolism ; *Gene Expression Regulation/genetics ; Genome/genetics ; Mice ; Models, Molecular ; *Nucleic Acid Conformation ; Protein Biosynthesis/genetics ; RNA/*chemistry/classification/*genetics/metabolism ; RNA-Binding Proteins/metabolism ; Regulatory Sequences, Ribonucleic Acid/genetics ; Ribosomes/metabolism ; Transcriptome/genetics
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 50
    Publication Date: 2015-03-25
    Description: No large group of recently extinct placental mammals remains as evolutionarily cryptic as the approximately 280 genera grouped as 'South American native ungulates'. To Charles Darwin, who first collected their remains, they included perhaps the 'strangest animal[s] ever discovered'. Today, much like 180 years ago, it is no clearer whether they had one origin or several, arose before or after the Cretaceous/Palaeogene transition 66.2 million years ago, or are more likely to belong with the elephants and sirenians of superorder Afrotheria than with the euungulates (cattle, horses, and allies) of superorder Laurasiatheria. Morphology-based analyses have proved unconvincing because convergences are pervasive among unrelated ungulate-like placentals. Approaches using ancient DNA have also been unsuccessful, probably because of rapid DNA degradation in semitropical and temperate deposits. Here we apply proteomic analysis to screen bone samples of the Late Quaternary South American native ungulate taxa Toxodon (Notoungulata) and Macrauchenia (Litopterna) for phylogenetically informative protein sequences. For each ungulate, we obtain approximately 90% direct sequence coverage of type I collagen alpha1- and alpha2-chains, representing approximately 900 of 1,140 amino-acid residues for each subunit. A phylogeny is estimated from an alignment of these fossil sequences with collagen (I) gene transcripts from available mammalian genomes or mass spectrometrically derived sequence data obtained for this study. The resulting consensus tree agrees well with recent higher-level mammalian phylogenies. Toxodon and Macrauchenia form a monophyletic group whose sister taxon is not Afrotheria or any of its constituent clades as recently claimed, but instead crown Perissodactyla (horses, tapirs, and rhinoceroses). These results are consistent with the origin of at least some South American native ungulates from 'condylarths', a paraphyletic assembly of archaic placentals. With ongoing improvements in instrumentation and analytical procedures, proteomics may produce a revolution in systematics such as that achieved by genomics, but with the possibility of reaching much further back in time.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Welker, Frido -- Collins, Matthew J -- Thomas, Jessica A -- Wadsley, Marc -- Brace, Selina -- Cappellini, Enrico -- Turvey, Samuel T -- Reguero, Marcelo -- Gelfo, Javier N -- Kramarz, Alejandro -- Burger, Joachim -- Thomas-Oates, Jane -- Ashford, David A -- Ashton, Peter D -- Rowsell, Keri -- Porter, Duncan M -- Kessler, Benedikt -- Fischer, Roman -- Baessmann, Carsten -- Kaspar, Stephanie -- Olsen, Jesper V -- Kiley, Patrick -- Elliott, James A -- Kelstrup, Christian D -- Mullin, Victoria -- Hofreiter, Michael -- Willerslev, Eske -- Hublin, Jean-Jacques -- Orlando, Ludovic -- Barnes, Ian -- MacPhee, Ross D E -- England -- Nature. 2015 Jun 4;522(7554):81-4. doi: 10.1038/nature14249. Epub 2015 Mar 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] BioArCh, University of York, York YO10 5DD, UK [2] Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, 04103 Leipzig, Germany. ; BioArCh, University of York, York YO10 5DD, UK. ; Department of Earth Sciences, Natural History Museum, London SW7 5BD, UK. ; Centre for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Oster Voldgade 5-7, 1350 Copenhagen K, Denmark. ; Institute of Zoology, Zoological Society of London, London NW1 4RY, UK. ; CONICET- Division Paleontologia de Vertebrados, Museo de La Plata. Facultad de Ciencias Naturales y Museo de La Plata, Universidad Nacional de La Plata. Paseo del Bosque s/n, B1900FWA, La Plata, Argentina. ; Seccion Paleontologia de Vertebrados. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", 470 Angel Gallardo Av., C1405DJR, Buenos Aires, Argentina. ; Institute of Anthropology, Johannes Gutenberg-University, Anselm-Franz-von-Bentzel-Weg 7, D-55128 Mainz, Germany. ; Department of Chemistry, University of York, York YO10 5DD, UK. ; Bioscience Technology Facility, Department of Biology, University of York, York YO10 5DD, UK. ; Department of Biological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA. ; Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Roosevelt Drive, Oxford OX3 7FZ, UK. ; Applications Development, Bruker Daltonik GmbH, 28359 Bremen, Germany. ; Novo Nordisk Foundation Center for Protein Research, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3b, 2200 Copenhagen, Denmark. ; Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, UK. ; Smurfit Institute of Genetics, Trinity College Dublin, Dublin 2, Ireland. ; 1] BioArCh, University of York, York YO10 5DD, UK [2] Institute for Biochemistry and Biology, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam OT Golm, Germany. ; Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, 04103 Leipzig, Germany. ; Department of Mammalogy, American Museum of Natural History, New York, New York 10024, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25799987" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bone and Bones/chemistry ; Cattle ; Collagen Type I/*chemistry/genetics ; Female ; *Fossils ; Mammals/*classification ; Perissodactyla/classification ; *Phylogeny ; Placenta ; Pregnancy ; Proteomics ; South America
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  • 51
    Publication Date: 2015-06-05
    Description: Macroautophagy (hereafter referred to as autophagy) degrades various intracellular constituents to regulate a wide range of cellular functions, and is also closely linked to several human diseases. In selective autophagy, receptor proteins recognize degradation targets and direct their sequestration by double-membrane vesicles called autophagosomes, which transport them into lysosomes or vacuoles. Although recent studies have shown that selective autophagy is involved in quality/quantity control of some organelles, including mitochondria and peroxisomes, it remains unclear how extensively it contributes to cellular organelle homeostasis. Here we describe selective autophagy of the endoplasmic reticulum (ER) and nucleus in the yeast Saccharomyces cerevisiae. We identify two novel proteins, Atg39 and Atg40, as receptors specific to these pathways. Atg39 localizes to the perinuclear ER (or the nuclear envelope) and induces autophagic sequestration of part of the nucleus. Atg40 is enriched in the cortical and cytoplasmic ER, and loads these ER subdomains into autophagosomes. Atg39-dependent autophagy of the perinuclear ER/nucleus is required for cell survival under nitrogen-deprivation conditions. Atg40 is probably the functional counterpart of FAM134B, an autophagy receptor for the ER in mammals that has been implicated in sensory neuropathy. Our results provide fundamental insight into the pathophysiological roles and mechanisms of 'ER-phagy' and 'nucleophagy' in other organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mochida, Keisuke -- Oikawa, Yu -- Kimura, Yayoi -- Kirisako, Hiromi -- Hirano, Hisashi -- Ohsumi, Yoshinori -- Nakatogawa, Hitoshi -- England -- Nature. 2015 Jun 18;522(7556):359-62. doi: 10.1038/nature14506. Epub 2015 Jun 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama 226-8503, Japan. ; Frontier Research Center, Tokyo Institute of Technology, Yokohama 226-8503, Japan. ; Advanced Medical Research Center, Yokohama City University, Yokohama 236-0004, Japan. ; 1] Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama 226-8503, Japan [2] CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26040717" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Autophagy ; Cell Nucleus/*metabolism ; Endoplasmic Reticulum/*metabolism ; Microbial Viability ; Microtubule-Associated Proteins/metabolism ; Neoplasm Proteins/metabolism ; Nitrogen/deficiency/metabolism ; Nuclear Envelope/metabolism ; Phenotype ; Protein Binding ; Receptors, Cytoplasmic and Nuclear/chemistry/deficiency/genetics/*metabolism ; Saccharomyces cerevisiae/*cytology/*metabolism ; Saccharomyces cerevisiae Proteins/chemistry/genetics/*metabolism ; Vesicular Transport Proteins/metabolism
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  • 52
    Publication Date: 2015-11-03
    Description: Cas9 is an RNA-guided DNA endonuclease that targets foreign DNA for destruction as part of a bacterial adaptive immune system mediated by clustered regularly interspaced short palindromic repeats (CRISPR). Together with single-guide RNAs, Cas9 also functions as a powerful genome engineering tool in plants and animals, and efforts are underway to increase the efficiency and specificity of DNA targeting for potential therapeutic applications. Studies of off-target effects have shown that DNA binding is far more promiscuous than DNA cleavage, yet the molecular cues that govern strand scission have not been elucidated. Here we show that the conformational state of the HNH nuclease domain directly controls DNA cleavage activity. Using intramolecular Forster resonance energy transfer experiments to detect relative orientations of the Cas9 catalytic domains when associated with on- and off-target DNA, we find that DNA cleavage efficiencies scale with the extent to which the HNH domain samples an activated conformation. We furthermore uncover a surprising mode of allosteric communication that ensures concerted firing of both Cas9 nuclease domains. Our results highlight a proofreading mechanism beyond initial protospacer adjacent motif (PAM) recognition and RNA-DNA base-pairing that serves as a final specificity checkpoint before DNA double-strand break formation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sternberg, Samuel H -- LaFrance, Benjamin -- Kaplan, Matias -- Doudna, Jennifer A -- T32GM007232/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Nov 5;527(7576):110-3. doi: 10.1038/nature15544. Epub 2015 Oct 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of California, Berkeley, California 94720, USA. ; Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA. ; Howard Hughes Medical Institute, University of California, Berkeley, California 94720, USA. ; Innovative Genomics Initiative, University of California, Berkeley, California 94720, USA. ; Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26524520" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Bacterial Proteins/chemistry/metabolism ; Base Pairing ; Binding Sites ; CRISPR-Associated Proteins/*chemistry/*metabolism ; *CRISPR-Cas Systems ; Catalytic Domain ; DNA/chemistry/*metabolism ; DNA Breaks, Double-Stranded ; *DNA Cleavage ; Endonucleases/chemistry/*metabolism ; Fluorescence Resonance Energy Transfer ; *Genetic Engineering ; Models, Molecular ; RNA, Guide/chemistry/metabolism ; Streptococcus pyogenes
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  • 53
    Publication Date: 2015-08-08
    Description: Activation of the mu-opioid receptor (muOR) is responsible for the efficacy of the most effective analgesics. To shed light on the structural basis for muOR activation, here we report a 2.1 A X-ray crystal structure of the murine muOR bound to the morphinan agonist BU72 and a G protein mimetic camelid antibody fragment. The BU72-stabilized changes in the muOR binding pocket are subtle and differ from those observed for agonist-bound structures of the beta2-adrenergic receptor (beta2AR) and the M2 muscarinic receptor. Comparison with active beta2AR reveals a common rearrangement in the packing of three conserved amino acids in the core of the muOR, and molecular dynamics simulations illustrate how the ligand-binding pocket is conformationally linked to this conserved triad. Additionally, an extensive polar network between the ligand-binding pocket and the cytoplasmic domains appears to play a similar role in signal propagation for all three G-protein-coupled receptors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4639397/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4639397/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, Weijiao -- Manglik, Aashish -- Venkatakrishnan, A J -- Laeremans, Toon -- Feinberg, Evan N -- Sanborn, Adrian L -- Kato, Hideaki E -- Livingston, Kathryn E -- Thorsen, Thor S -- Kling, Ralf C -- Granier, Sebastien -- Gmeiner, Peter -- Husbands, Stephen M -- Traynor, John R -- Weis, William I -- Steyaert, Jan -- Dror, Ron O -- Kobilka, Brian K -- R01GM083118/GM/NIGMS NIH HHS/ -- R37 DA036246/DA/NIDA NIH HHS/ -- R37DA036246/DA/NIDA NIH HHS/ -- T32 GM008294/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Aug 20;524(7565):315-21. doi: 10.1038/nature14886. Epub 2015 Aug 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Physiology, Stanford University School of Medicine, 279 Campus Drive, Stanford, California 94305, USA. ; Department of Computer Science, Stanford University, 318 Campus Drive, Stanford, California 94305, USA. ; Institute for Computational and Mathematical Engineering, Stanford University, 475 Via Ortega, Stanford, California 94305, USA. ; Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium. ; Structural Biology Research Center, VIB, Pleinlaan 2, B-1050 Brussels, Belgium. ; Department of Pharmacology, University of Michigan, Ann Arbor, Michigan 48109, USA. ; Department of Chemistry and Pharmacy, Friedrich Alexander University, Schuhstrasse 19, 91052 Erlangen, Germany. ; Institut de Genomique Fonctionnelle, CNRS UMR-5203 INSERM U1191, University of Montpellier, F-34000 Montpellier, France. ; Department of Pharmacy and Pharmacology, University of Bath, Bath BA2 7AY, UK. ; Department of Structural Biology, Stanford University School of Medicine, 299 Campus Drive, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26245379" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Animals ; Binding Sites ; Crystallography, X-Ray ; Heterotrimeric GTP-Binding Proteins/chemistry/metabolism ; Mice ; Models, Molecular ; Molecular Dynamics Simulation ; Morphinans/chemistry/metabolism/pharmacology ; Protein Stability/drug effects ; Protein Structure, Tertiary ; Pyrroles/chemistry/metabolism/pharmacology ; Receptor, Muscarinic M2/chemistry ; Receptors, Adrenergic, beta-2/chemistry ; Receptors, Opioid, mu/agonists/*chemistry/*metabolism ; Single-Chain Antibodies/chemistry/pharmacology ; Structure-Activity Relationship
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  • 54
    Publication Date: 2015-04-10
    Description: Adiponectin stimulation of its receptors, AdipoR1 and AdipoR2, increases the activities of 5' AMP-activated protein kinase (AMPK) and peroxisome proliferator-activated receptor (PPAR), respectively, thereby contributing to healthy longevity as key anti-diabetic molecules. AdipoR1 and AdipoR2 were predicted to contain seven transmembrane helices with the opposite topology to G-protein-coupled receptors. Here we report the crystal structures of human AdipoR1 and AdipoR2 at 2.9 and 2.4 A resolution, respectively, which represent a novel class of receptor structure. The seven-transmembrane helices, conformationally distinct from those of G-protein-coupled receptors, enclose a large cavity where three conserved histidine residues coordinate a zinc ion. The zinc-binding structure may have a role in the adiponectin-stimulated AMPK phosphorylation and UCP2 upregulation. Adiponectin may broadly interact with the extracellular face, rather than the carboxy-terminal tail, of the receptors. The present information will facilitate the understanding of novel structure-function relationships and the development and optimization of AdipoR agonists for the treatment of obesity-related diseases, such as type 2 diabetes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4477036/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4477036/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanabe, Hiroaki -- Fujii, Yoshifumi -- Okada-Iwabu, Miki -- Iwabu, Masato -- Nakamura, Yoshihiro -- Hosaka, Toshiaki -- Motoyama, Kanna -- Ikeda, Mariko -- Wakiyama, Motoaki -- Terada, Takaho -- Ohsawa, Noboru -- Hato, Masakatsu -- Ogasawara, Satoshi -- Hino, Tomoya -- Murata, Takeshi -- Iwata, So -- Hirata, Kunio -- Kawano, Yoshiaki -- Yamamoto, Masaki -- Kimura-Someya, Tomomi -- Shirouzu, Mikako -- Yamauchi, Toshimasa -- Kadowaki, Takashi -- Yokoyama, Shigeyuki -- 062164/Z/00/Z/Wellcome Trust/United Kingdom -- 089809/Wellcome Trust/United Kingdom -- BB/G02325/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/G023425/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- England -- Nature. 2015 Apr 16;520(7547):312-6. doi: 10.1038/nature14301. Epub 2015 Apr 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Department of Biophysics and Biochemistry and Laboratory of Structural Biology, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [3] Division of Structural and Synthetic Biology, RIKEN Center for Life Science Technologies, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [4] RIKEN Structural Biology Laboratory, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. ; 1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] RIKEN Structural Biology Laboratory, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. ; 1] Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [2] Department of Integrated Molecular Science on Metabolic Diseases, 22nd Century Medical and Research Center, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. ; 1] Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [2] Department of Integrated Molecular Science on Metabolic Diseases, 22nd Century Medical and Research Center, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [3] PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan. ; 1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Division of Structural and Synthetic Biology, RIKEN Center for Life Science Technologies, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [3] RIKEN Structural Biology Laboratory, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. ; 1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Division of Structural and Synthetic Biology, RIKEN Center for Life Science Technologies, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. ; RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan. ; Department of Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan. ; 1] Department of Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan [2] JST, Research Acceleration Program, Membrane Protein Crystallography Project, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan. ; 1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Department of Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan [3] JST, Research Acceleration Program, Membrane Protein Crystallography Project, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan [4] Department of Chemistry, Graduate School of Science, Chiba University, Yayoi-cho, Inage, Chiba 263-8522, Japan. ; 1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Department of Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto 606-8501, Japan [3] JST, Research Acceleration Program, Membrane Protein Crystallography Project, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan [4] Division of Molecular Biosciences, Membrane Protein Crystallography Group, Imperial College, London SW7 2AZ, UK [5] Diamond Light Source, Harwell Science and Innovation Campus, Chilton, Didcot, Oxfordshire OX11 0DE, UK [6] RIKEN SPring-8 Center, Harima Institute, Kouto, Sayo, Hyogo 679-5148, Japan. ; RIKEN SPring-8 Center, Harima Institute, Kouto, Sayo, Hyogo 679-5148, Japan. ; 1] Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [2] Department of Integrated Molecular Science on Metabolic Diseases, 22nd Century Medical and Research Center, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [3] CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan. ; 1] RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan [2] Department of Biophysics and Biochemistry and Laboratory of Structural Biology, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan [3] RIKEN Structural Biology Laboratory, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25855295" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Crystallography, X-Ray ; Histidine/chemistry/metabolism ; Humans ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation ; Receptors, Adiponectin/*chemistry/metabolism ; Structure-Activity Relationship ; Zinc/metabolism
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  • 55
    Publication Date: 2015-07-15
    Description: Epistasis-the non-additive interactions between different genetic loci-constrains evolutionary pathways, blocking some and permitting others. For biological networks such as transcription circuits, the nature of these constraints and their consequences are largely unknown. Here we describe the evolutionary pathways of a transcription network that controls the response to mating pheromone in yeast. A component of this network, the transcription regulator Ste12, has evolved two different modes of binding to a set of its target genes. In one group of species, Ste12 binds to specific DNA binding sites, while in another lineage it occupies DNA indirectly, relying on a second transcription regulator to recognize DNA. We show, through the construction of various possible evolutionary intermediates, that evolution of the direct mode of DNA binding was not directly accessible to the ancestor. Instead, it was contingent on a lineage-specific change to an overlapping transcription network with a different function, the specification of cell type. These results show that analysing and predicting the evolution of cis-regulatory regions requires an understanding of their positions in overlapping networks, as this placement constrains the available evolutionary pathways.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4531262/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4531262/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sorrells, Trevor R -- Booth, Lauren N -- Tuch, Brian B -- Johnson, Alexander D -- R01 GM037049/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Jul 16;523(7560):361-5. doi: 10.1038/nature14613. Epub 2015 Jul 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Biochemistry &Biophysics, Department of Microbiology &Immunology, University of California, San Francisco, California 94158, USA [2] Tetrad Graduate Program, University of California, San Francisco, California 94158, USA. ; 1] Department of Biochemistry &Biophysics, Department of Microbiology &Immunology, University of California, San Francisco, California 94158, USA [2] Biological and Medical Informatics Graduate Program, University of California, San Francisco, California 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26153861" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; DNA, Fungal/genetics/metabolism ; DNA-Binding Proteins/metabolism ; Enhancer Elements, Genetic/genetics ; Epistasis, Genetic ; *Evolution, Molecular ; Gene Expression Regulation, Fungal/drug effects/*genetics ; Gene Regulatory Networks/drug effects/*genetics ; Genes, Fungal/genetics ; Kluyveromyces/drug effects/genetics/metabolism ; Peptides/metabolism/pharmacology ; Pheromones/metabolism/pharmacology ; Promoter Regions, Genetic/genetics ; Saccharomyces cerevisiae/drug effects/*genetics/metabolism ; Saccharomyces cerevisiae Proteins/metabolism ; Transcription Factors/metabolism
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  • 56
    Publication Date: 2015-01-28
    Description: The origin of mutations is central to understanding evolution and of key relevance to health. Variation occurs non-randomly across the genome, and mechanisms for this remain to be defined. Here we report that the 5' ends of Okazaki fragments have significantly increased levels of nucleotide substitution, indicating a replicative origin for such mutations. Using a novel method, emRiboSeq, we map the genome-wide contribution of polymerases, and show that despite Okazaki fragment processing, DNA synthesized by error-prone polymerase-alpha (Pol-alpha) is retained in vivo, comprising approximately 1.5% of the mature genome. We propose that DNA-binding proteins that rapidly re-associate post-replication act as partial barriers to Pol-delta-mediated displacement of Pol-alpha-synthesized DNA, resulting in incorporation of such Pol-alpha tracts and increased mutation rates at specific sites. We observe a mutational cost to chromatin and regulatory protein binding, resulting in mutation hotspots at regulatory elements, with signatures of this process detectable in both yeast and humans.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4374164/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4374164/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reijns, Martin A M -- Kemp, Harriet -- Ding, James -- de Proce, Sophie Marion -- Jackson, Andrew P -- Taylor, Martin S -- MC_PC_U127580972/Medical Research Council/United Kingdom -- MC_PC_U127597124/Medical Research Council/United Kingdom -- MC_U127597124/Medical Research Council/United Kingdom -- Medical Research Council/United Kingdom -- England -- Nature. 2015 Feb 26;518(7540):502-6. doi: 10.1038/nature14183. Epub 2015 Jan 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical and Developmental Genetics, MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XU, UK. ; Biomedical Systems Analysis, MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh EH4 2XU, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25624100" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Chromatin/chemistry/metabolism ; Conserved Sequence/genetics ; DNA/*biosynthesis/*genetics ; DNA Polymerase I/metabolism ; DNA Polymerase III/metabolism ; DNA Replication/*genetics ; DNA-Binding Proteins/metabolism ; Evolution, Molecular ; Genome, Human/*genetics ; Humans ; Models, Biological ; Mutagenesis/genetics ; Mutation/*genetics ; Protein Binding ; Saccharomyces cerevisiae/genetics ; Transcription Factors/metabolism
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  • 57
    Publication Date: 2015-10-04
    Description: Structural variants are implicated in numerous diseases and make up the majority of varying nucleotides among human genomes. Here we describe an integrated set of eight structural variant classes comprising both balanced and unbalanced variants, which we constructed using short-read DNA sequencing data and statistically phased onto haplotype blocks in 26 human populations. Analysing this set, we identify numerous gene-intersecting structural variants exhibiting population stratification and describe naturally occurring homozygous gene knockouts that suggest the dispensability of a variety of human genes. We demonstrate that structural variants are enriched on haplotypes identified by genome-wide association studies and exhibit enrichment for expression quantitative trait loci. Additionally, we uncover appreciable levels of structural variant complexity at different scales, including genic loci subject to clusters of repeated rearrangement and complex structural variants with multiple breakpoints likely to have formed through individual mutational events. Our catalogue will enhance future studies into structural variant demography, functional impact and disease association.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4617611/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4617611/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sudmant, Peter H -- Rausch, Tobias -- Gardner, Eugene J -- Handsaker, Robert E -- Abyzov, Alexej -- Huddleston, John -- Zhang, Yan -- Ye, Kai -- Jun, Goo -- Hsi-Yang Fritz, Markus -- Konkel, Miriam K -- Malhotra, Ankit -- Stutz, Adrian M -- Shi, Xinghua -- Paolo Casale, Francesco -- Chen, Jieming -- Hormozdiari, Fereydoun -- Dayama, Gargi -- Chen, Ken -- Malig, Maika -- Chaisson, Mark J P -- Walter, Klaudia -- Meiers, Sascha -- Kashin, Seva -- Garrison, Erik -- Auton, Adam -- Lam, Hugo Y K -- Jasmine Mu, Xinmeng -- Alkan, Can -- Antaki, Danny -- Bae, Taejeong -- Cerveira, Eliza -- Chines, Peter -- Chong, Zechen -- Clarke, Laura -- Dal, Elif -- Ding, Li -- Emery, Sarah -- Fan, Xian -- Gujral, Madhusudan -- Kahveci, Fatma -- Kidd, Jeffrey M -- Kong, Yu -- Lameijer, Eric-Wubbo -- McCarthy, Shane -- Flicek, Paul -- Gibbs, Richard A -- Marth, Gabor -- Mason, Christopher E -- Menelaou, Androniki -- Muzny, Donna M -- Nelson, Bradley J -- Noor, Amina -- Parrish, Nicholas F -- Pendleton, Matthew -- Quitadamo, Andrew -- Raeder, Benjamin -- Schadt, Eric E -- Romanovitch, Mallory -- Schlattl, Andreas -- Sebra, Robert -- Shabalin, Andrey A -- Untergasser, Andreas -- Walker, Jerilyn A -- Wang, Min -- Yu, Fuli -- Zhang, Chengsheng -- Zhang, Jing -- Zheng-Bradley, Xiangqun -- Zhou, Wanding -- Zichner, Thomas -- Sebat, Jonathan -- Batzer, Mark A -- McCarroll, Steven A -- 1000 Genomes Project Consortium -- Mills, Ryan E -- Gerstein, Mark B -- Bashir, Ali -- Stegle, Oliver -- Devine, Scott E -- Lee, Charles -- Eichler, Evan E -- Korbel, Jan O -- P01HG007497/HG/NHGRI NIH HHS/ -- R01 CA166661/CA/NCI NIH HHS/ -- R01 HG002385/HG/NHGRI NIH HHS/ -- R01 HG002898/HG/NHGRI NIH HHS/ -- R01CA166661/CA/NCI NIH HHS/ -- R01GM59290/GM/NIGMS NIH HHS/ -- R01HG002898/HG/NHGRI NIH HHS/ -- R01HG007068/HG/NHGRI NIH HHS/ -- RR029676-01/RR/NCRR NIH HHS/ -- RR19895/RR/NCRR NIH HHS/ -- T32 GM008666/GM/NIGMS NIH HHS/ -- U41 HG007497/HG/NHGRI NIH HHS/ -- U41HG007497/HG/NHGRI NIH HHS/ -- WT085532/Z/08/Z/Wellcome Trust/United Kingdom -- WT104947/Z/14/Z/Wellcome Trust/United Kingdom -- England -- Nature. 2015 Oct 1;526(7571):75-81. doi: 10.1038/nature15394.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genome Sciences, University of Washington, 3720 15th Avenue NE, Seattle, Washington 98195-5065, USA. ; European Molecular Biology Laboratory (EMBL), Genome Biology Unit, Meyerhofstrasse 1, 69117 Heidelberg, Germany. ; Institute for Genome Sciences, University of Maryland School of Medicine, 801 W Baltimore Street, Baltimore, Maryland 21201, USA. ; Department of Genetics, Harvard Medical School, Boston, 25 Shattuck Street, Boston, Massachusetts 02115, USA. ; Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, USA. ; Department of Health Sciences Research, Center for Individualized Medicine, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA. ; Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA. ; Program in Computational Biology and Bioinformatics, Yale University, BASS 432 &437, 266 Whitney Avenue, New Haven, Connecticut 06520, USA. ; Department of Molecular Biophysics and Biochemistry, School of Medicine, Yale University, 266 Whitney Avenue, New Haven, Connecticut 06520, USA. ; The Genome Institute, Washington University School of Medicine, 4444 Forest Park Avenue, St Louis, Missouri 63108, USA. ; Department of Genetics, Washington University in St Louis, 4444 Forest Park Avenue, St Louis, Missouri 63108, USA. ; Department of Biostatistics and Center for Statistical Genetics, University of Michigan, 1415 Washington Heights, Ann Arbor, Michigan 48109, USA. ; Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, 1200 Pressler St., Houston, Texas 77030, USA. ; Department of Biological Sciences, Louisiana State University, 202 Life Sciences Building, Baton Rouge, Louisiana 70803, USA. ; The Jackson Laboratory for Genomic Medicine, 10 Discovery 263 Farmington Avenue, Farmington, Connecticut 06030, USA. ; Department of Bioinformatics and Genomics, University of North Carolina at Charlotte, 9201 University City Blvd., Charlotte, North Carolina 28223, USA. ; European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SD, UK. ; Integrated Graduate Program in Physical and Engineering Biology, Yale University, New Haven, Connecticut 06520, USA. ; Department of Computational Medicine &Bioinformatics, University of Michigan, 500 S. State Street, Ann Arbor, Michigan 48109, USA. ; The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, Texas 77030, USA. ; The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge CB10 1SA, UK. ; Department of Biology, Boston College, 355 Higgins Hall, 140 Commonwealth Avenue, Chestnut Hill, Massachusetts 02467, USA. ; Department of Genetics, Albert Einstein College of Medicine, 1301 Morris Park Avenue, Bronx, New York 10461, USA. ; Bina Technologies, Roche Sequencing, 555 Twin Dolphin Drive, Redwood City, California 94065, USA. ; Cancer Program, Broad Institute of MIT and Harvard, 415 Main Street, Cambridge, Massachusetts 02142, USA. ; Department of Computer Engineering, Bilkent University, 06800 Ankara, Turkey. ; University of California San Diego (UCSD), 9500 Gilman Drive, La Jolla, California 92093, USA. ; National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland 20892 USA. ; Department of Medicine, Washington University in St Louis, 4444 Forest Park Avenue, St Louis, Missouri 63108, USA. ; Siteman Cancer Center, 660 South Euclid Avenue, St Louis, Missouri 63110, USA. ; Department of Human Genetics, University of Michigan, 1241 Catherine Street, Ann Arbor, Michigan 48109, USA. ; Molecular Epidemiology, Leiden University Medical Center, Leiden 2300RA, The Netherlands. ; Baylor College of Medicine, 1 Baylor Plaza, Houston, Texas 77030, USA. ; The Department of Physiology and Biophysics and the HRH Prince Alwaleed Bin Talal Bin Abdulaziz Alsaud Institute for Computational Biomedicine, 1305 York Avenue, Weill Cornell Medical College, New York, New York 10065, USA. ; The Feil Family Brain and Mind Research Institute, 413 East 69th St, Weill Cornell Medical College, New York, New York 10065, USA. ; University of Oxford, 1 South Parks Road, Oxford OX3 9DS, UK. ; Department of Medical Genetics, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht, 3584 CG, The Netherlands. ; Department of Genetics and Genomic Sciences, Icahn School of Medicine, New York School of Natural Sciences, 1428 Madison Avenue, New York, New York 10029, USA. ; Institute for Virus Research, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan. ; Center for Biomarker Research and Precision Medicine, Virginia Commonwealth University, 1112 East Clay Street, McGuire Hall, Richmond, Virginia 23298-0581, USA. ; Zentrum fur Molekulare Biologie, University of Heidelberg, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany. ; Department of Computer Science, Yale University, 51 Prospect Street, New Haven, Connecticut 06511, USA. ; Department of Graduate Studies - Life Sciences, Ewha Womans University, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, South Korea.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26432246" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Genetic Predisposition to Disease ; Genetic Variation/*genetics ; Genetics, Medical ; Genetics, Population ; Genome, Human/*genetics ; Genome-Wide Association Study ; Genomics ; Genotype ; Haplotypes/genetics ; Homozygote ; Humans ; Molecular Sequence Data ; Mutation Rate ; *Physical Chromosome Mapping ; Polymorphism, Single Nucleotide/genetics ; Quantitative Trait Loci/genetics ; Sequence Analysis, DNA ; Sequence Deletion/genetics
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  • 58
    Publication Date: 2015-07-07
    Description: G protein-coupled receptors (GPCRs) allosterically activate heterotrimeric G proteins and trigger GDP release. Given that there are approximately 800 human GPCRs and 16 different Galpha genes, this raises the question of whether a universal allosteric mechanism governs Galpha activation. Here we show that different GPCRs interact with and activate Galpha proteins through a highly conserved mechanism. Comparison of Galpha with the small G protein Ras reveals how the evolution of short segments that undergo disorder-to-order transitions can decouple regions important for allosteric activation from receptor binding specificity. This might explain how the GPCR-Galpha system diversified rapidly, while conserving the allosteric activation mechanism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Flock, Tilman -- Ravarani, Charles N J -- Sun, Dawei -- Venkatakrishnan, A J -- Kayikci, Melis -- Tate, Christopher G -- Veprintsev, Dmitry B -- Babu, M Madan -- MC_U105185859/Medical Research Council/United Kingdom -- MC_U105197215/Medical Research Council/United Kingdom -- England -- Nature. 2015 Aug 13;524(7564):173-9. doi: 10.1038/nature14663. Epub 2015 Jul 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK. ; 1] Laboratory of Biomolecular Research, Paul Scherrer Institut, 5232 Villigen, Switzerland [2] Department of Biology, ETH Zurich, 8039 Zurich, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26147082" target="_blank"〉PubMed〈/a〉
    Keywords: *Allosteric Regulation ; Animals ; Binding Sites ; Computational Biology ; Conserved Sequence ; Enzyme Activation ; *Evolution, Molecular ; GTP-Binding Protein alpha Subunits/chemistry/genetics/*metabolism ; Genetic Engineering ; Guanosine Diphosphate/metabolism ; Humans ; Models, Molecular ; Mutation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Receptors, G-Protein-Coupled/chemistry/*metabolism ; Signal Transduction ; Substrate Specificity ; ras Proteins/chemistry/metabolism
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  • 59
    Publication Date: 2015-04-08
    Description: Regulation of protein synthesis is fundamental for all aspects of eukaryotic biology by controlling development, homeostasis and stress responses. The 13-subunit, 800-kilodalton eukaryotic initiation factor 3 (eIF3) organizes initiation factor and ribosome interactions required for productive translation. However, current understanding of eIF3 function does not explain genetic evidence correlating eIF3 deregulation with tissue-specific cancers and developmental defects. Here we report the genome-wide discovery of human transcripts that interact with eIF3 using photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation (PAR-CLIP). eIF3 binds to a highly specific program of messenger RNAs involved in cell growth control processes, including cell cycling, differentiation and apoptosis, via the mRNA 5' untranslated region. Surprisingly, functional analysis of the interaction between eIF3 and two mRNAs encoding the cell proliferation regulators c-JUN and BTG1 reveals that eIF3 uses different modes of RNA stem-loop binding to exert either translational activation or repression. Our findings illuminate a new role for eIF3 in governing a specialized repertoire of gene expression and suggest that binding of eIF3 to specific mRNAs could be targeted to control carcinogenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4603833/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4603833/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Amy S Y -- Kranzusch, Philip J -- Cate, Jamie H D -- P50 GM102706/GM/NIGMS NIH HHS/ -- S10 RR027303/RR/NCRR NIH HHS/ -- S10 RR029668/RR/NCRR NIH HHS/ -- S10RR025622/RR/NCRR NIH HHS/ -- S10RR027303/RR/NCRR NIH HHS/ -- S10RR029668/RR/NCRR NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Jun 4;522(7554):111-4. doi: 10.1038/nature14267. Epub 2015 Apr 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Molecular &Cell Biology, University of California, Berkeley, Berkeley, California 94720, USA [2] Center for RNA Systems Biology, University of California, Berkeley, Berkeley, California 94720, USA. ; 1] Department of Molecular &Cell Biology, University of California, Berkeley, Berkeley, California 94720, USA [2] Howard Hughes Medical Institute (HHMI), University of California, Berkeley, Berkeley, California 94720, USA. ; 1] Department of Molecular &Cell Biology, University of California, Berkeley, Berkeley, California 94720, USA [2] Center for RNA Systems Biology, University of California, Berkeley, Berkeley, California 94720, USA [3] Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, USA [4] Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25849773" target="_blank"〉PubMed〈/a〉
    Keywords: 5' Untranslated Regions/genetics ; Apoptosis ; Binding Sites ; Cell Differentiation ; Cell Line ; Cell Proliferation/genetics ; Cross-Linking Reagents ; *Down-Regulation ; Eukaryotic Initiation Factor-3/chemistry/*metabolism ; Humans ; Immunoprecipitation ; Neoplasm Proteins/metabolism ; Neoplasms/metabolism/pathology ; Organ Specificity ; *Peptide Chain Initiation, Translational ; Phenotype ; Proto-Oncogene Proteins c-jun/metabolism ; RNA, Messenger/*genetics/*metabolism ; Reproducibility of Results ; Ribonucleosides ; Ribosomes/metabolism ; Substrate Specificity ; Transcriptome
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  • 60
    Publication Date: 2015-09-04
    Description: Biomolecular self-assemblies are of great interest to nanotechnologists because of their functional versatility and their biocompatibility. Over the past decade, sophisticated single-component nanostructures composed exclusively of nucleic acids, peptides and proteins have been reported, and these nanostructures have been used in a wide range of applications, from drug delivery to molecular computing. Despite these successes, the development of hybrid co-assemblies of nucleic acids and proteins has remained elusive. Here we use computational protein design to create a protein-DNA co-assembling nanomaterial whose assembly is driven via non-covalent interactions. To achieve this, a homodimerization interface is engineered onto the Drosophila Engrailed homeodomain (ENH), allowing the dimerized protein complex to bind to two double-stranded DNA (dsDNA) molecules. By varying the arrangement of protein-binding sites on the dsDNA, an irregular bulk nanoparticle or a nanowire with single-molecule width can be spontaneously formed by mixing the protein and dsDNA building blocks. We characterize the protein-DNA nanowire using fluorescence microscopy, atomic force microscopy and X-ray crystallography, confirming that the nanowire is formed via the proposed mechanism. This work lays the foundation for the development of new classes of protein-DNA hybrid materials. Further applications can be explored by incorporating DNA origami, DNA aptamers and/or peptide epitopes into the protein-DNA framework presented here.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mou, Yun -- Yu, Jiun-Yann -- Wannier, Timothy M -- Guo, Chin-Lin -- Mayo, Stephen L -- England -- Nature. 2015 Sep 10;525(7568):230-3. doi: 10.1038/nature14874. Epub 2015 Sep 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA. ; Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California 91125, USA. ; Division of Engineering and Applied Science, California Institute of Technology, Pasadena, California 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26331548" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; *Computer Simulation ; Crystallization ; Crystallography, X-Ray ; DNA/*chemistry ; *Drug Design ; Homeodomain Proteins/chemistry/genetics/metabolism ; Microscopy, Atomic Force ; Microscopy, Fluorescence ; Models, Molecular ; Nanotechnology ; Nanowires/*chemistry ; Protein Multimerization ; Transcription Factors/chemistry/genetics/metabolism
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  • 61
    Publication Date: 2015-01-03
    Description: Proton-pumping complex I of the mitochondrial respiratory chain is among the largest and most complicated membrane protein complexes. The enzyme contributes substantially to oxidative energy conversion in eukaryotic cells. Its malfunctions are implicated in many hereditary and degenerative disorders. We report the x-ray structure of mitochondrial complex I at a resolution of 3.6 to 3.9 angstroms, describing in detail the central subunits that execute the bioenergetic function. A continuous axis of basic and acidic residues running centrally through the membrane arm connects the ubiquinone reduction site in the hydrophilic arm to four putative proton-pumping units. The binding position for a substrate analogous inhibitor and blockage of the predicted ubiquinone binding site provide a model for the "deactive" form of the enzyme. The proposed transition into the active form is based on a concerted structural rearrangement at the ubiquinone reduction site, providing support for a two-state stabilization-change mechanism of proton pumping.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zickermann, Volker -- Wirth, Christophe -- Nasiri, Hamid -- Siegmund, Karin -- Schwalbe, Harald -- Hunte, Carola -- Brandt, Ulrich -- New York, N.Y. -- Science. 2015 Jan 2;347(6217):44-9. doi: 10.1126/science.1259859.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Bioenergetics Group, Institute of Biochemistry II, Medical School, Goethe-University, 60438 Frankfurt am Main, Germany. Cluster of Excellence Frankfurt "Macromolecular Complexes," Goethe-University, 60438 Frankfurt am Main, Germany. zickermann@med.uni-frankfurt.de carola.hunte@biochemie.uni-freiburg.de ulrich.brandt@radboudumc.nl. ; Institute for Biochemistry and Molecular Biology, ZBMZ, BIOSS Centre for Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany. ; Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK. Institute of Organic Chemistry and Chemical Biology, Center for Biomolecular Magnetic Resonance, 60438 Frankfurt am Main, Germany. ; Structural Bioenergetics Group, Institute of Biochemistry II, Medical School, Goethe-University, 60438 Frankfurt am Main, Germany. ; Cluster of Excellence Frankfurt "Macromolecular Complexes," Goethe-University, 60438 Frankfurt am Main, Germany. Institute of Organic Chemistry and Chemical Biology, Center for Biomolecular Magnetic Resonance, 60438 Frankfurt am Main, Germany. ; Institute for Biochemistry and Molecular Biology, ZBMZ, BIOSS Centre for Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany. zickermann@med.uni-frankfurt.de carola.hunte@biochemie.uni-freiburg.de ulrich.brandt@radboudumc.nl. ; Cluster of Excellence Frankfurt "Macromolecular Complexes," Goethe-University, 60438 Frankfurt am Main, Germany. Nijmegen Center for Mitochondrial Disorders, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands. zickermann@med.uni-frankfurt.de carola.hunte@biochemie.uni-freiburg.de ulrich.brandt@radboudumc.nl.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25554780" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Crystallography, X-Ray ; Electron Transport Complex I/*chemistry/ultrastructure ; Mitochondria/*enzymology ; Mitochondrial Membranes/*enzymology ; Protein Structure, Secondary ; Protons ; Ubiquinone/chemistry ; Yarrowia/enzymology
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  • 62
    Publication Date: 2015-07-04
    Description: Lactic acid racemization is involved in lactate metabolism and cell wall assembly of many microorganisms. Lactate racemase (Lar) requires nickel, but the nickel-binding site and the role of three accessory proteins required for its activation remain enigmatic. We combined mass spectrometry and x-ray crystallography to show that Lar from Lactobacillus plantarum possesses an organometallic nickel-containing prosthetic group. A nicotinic acid mononucleotide derivative is tethered to Lys(184) and forms a tridentate pincer complex that coordinates nickel through one metal-carbon and two metal-sulfur bonds, with His(200) as another ligand. Although similar complexes have been previously synthesized, there was no prior evidence for the existence of pincer cofactors in enzymes. The wide distribution of the accessory proteins without Lar suggests that it may play a role in other enzymes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Desguin, Benoit -- Zhang, Tuo -- Soumillion, Patrice -- Hols, Pascal -- Hu, Jian -- Hausinger, Robert P -- New York, N.Y. -- Science. 2015 Jul 3;349(6243):66-9. doi: 10.1126/science.aab2272.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA. ; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA. ; Institute of Life Sciences, Universite Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium. ; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA. Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA. hujian1@msu.edu hausinge@msu.edu. ; Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA. Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA. hujian1@msu.edu hausinge@msu.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26138974" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/*chemistry/genetics ; Binding Sites ; Carbon/chemistry ; Catalysis ; Crystallography, X-Ray ; Histidine/chemistry ; Holoenzymes/chemistry ; Lactic Acid/*biosynthesis/chemistry ; Lactobacillus plantarum/*enzymology/genetics ; Ligands ; Lysine/chemistry ; Metalloproteins/*chemistry/genetics ; Niacin/*chemistry ; Nickel/*chemistry ; Nicotinamide Mononucleotide/analogs & derivatives/chemistry ; Protein Processing, Post-Translational ; Protein Structure, Secondary ; Racemases and Epimerases/*chemistry/genetics ; Spectrometry, Mass, Electrospray Ionization ; Sulfur
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  • 63
    Publication Date: 2015-05-23
    Description: Extremophiles, microorganisms thriving in extreme environmental conditions, must have proteins and nucleic acids that are stable at extremes of temperature and pH. The nonenveloped, rod-shaped virus SIRV2 (Sulfolobus islandicus rod-shaped virus 2) infects the hyperthermophilic acidophile Sulfolobus islandicus, which lives at 80 degrees C and pH 3. We have used cryo-electron microscopy to generate a three-dimensional reconstruction of the SIRV2 virion at ~4 angstrom resolution, which revealed a previously unknown form of virion organization. Although almost half of the capsid protein is unstructured in solution, this unstructured region folds in the virion into a single extended alpha helix that wraps around the DNA. The DNA is entirely in the A-form, which suggests a common mechanism with bacterial spores for protecting DNA in the most adverse environments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DiMaio, Frank -- Yu, Xiong -- Rensen, Elena -- Krupovic, Mart -- Prangishvili, David -- Egelman, Edward H -- GM035269/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 May 22;348(6237):914-7. doi: 10.1126/science.aaa4181.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle, WA 98195, USA. ; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA. ; Institut Pasteur, Department of Microbiology, 25 rue du Dr. Roux, Paris 75015, France. ; Institut Pasteur, Department of Microbiology, 25 rue du Dr. Roux, Paris 75015, France. egelman@virginia.edu david.prangishvili@pasteur.fr. ; Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908, USA. egelman@virginia.edu david.prangishvili@pasteur.fr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25999507" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cryoelectron Microscopy ; DNA, A-Form/*metabolism ; Molecular Sequence Data ; Protein Multimerization ; Protein Structure, Secondary ; Rudiviridae/*metabolism/ultrastructure ; Spores, Bacterial/genetics/virology ; Sulfolobus/*genetics/*virology ; Virion/*ultrastructure
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  • 64
    Publication Date: 2015-10-10
    Description: Strigolactones are naturally occurring signaling molecules that affect plant development, fungi-plant interactions, and parasitic plant infestations. We characterized the function of 11 strigolactone receptors from the parasitic plant Striga hermonthica using chemical and structural biology. We found a clade of polyspecific receptors, including one that is sensitive to picomolar concentrations of strigolactone. A crystal structure of a highly sensitive strigolactone receptor from Striga revealed a larger binding pocket than that of the Arabidopsis receptor, which could explain the increased range of strigolactone sensitivity. Thus, the sensitivity of Striga to strigolactones from host plants is driven by receptor sensitivity. By expressing strigolactone receptors in Arabidopsis, we developed a bioassay that can be used to identify chemicals and crops with altered strigolactone levels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Toh, Shigeo -- Holbrook-Smith, Duncan -- Stogios, Peter J -- Onopriyenko, Olena -- Lumba, Shelley -- Tsuchiya, Yuichiro -- Savchenko, Alexei -- McCourt, Peter -- New York, N.Y. -- Science. 2015 Oct 9;350(6257):203-7. doi: 10.1126/science.aac9476.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto M5S 3B2, Canada. ; Department of Chemical Engineering and Applied Chemistry, Banting and Best Department of Medical Research, University of Toronto, 200 College Street, Toronto M5S 3E5, Canada. Center for Structural Genomics of Infectious Diseases, contracted by National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA. ; Department of Chemical Engineering and Applied Chemistry, Banting and Best Department of Medical Research, University of Toronto, 200 College Street, Toronto M5S 3E5, Canada. ; Institute of Transformative Bio-Molecules, Nagoya University, Japan, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan. ; Cell and Systems Biology, University of Toronto, 25 Willcocks Street, Toronto M5S 3B2, Canada. peter.mccourt@utoronto.ca.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26450211" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/genetics/metabolism ; Catalytic Domain ; Germination/drug effects ; Heterocyclic Compounds, 3-Ring/*metabolism/pharmacology ; Lactones/*metabolism/pharmacology ; Molecular Sequence Data ; Phylogeny ; Plant Growth Regulators/*metabolism/pharmacology ; Plant Proteins/*chemistry/classification/genetics ; Protein Structure, Secondary ; Receptors, Cell Surface/*chemistry/classification/genetics ; Seeds/genetics/growth & development/metabolism ; Striga/genetics/growth & development/*metabolism ; Structure-Activity Relationship
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  • 65
    Publication Date: 2015-03-15
    Description: TREK-2 (KCNK10/K2P10), a two-pore domain potassium (K2P) channel, is gated by multiple stimuli such as stretch, fatty acids, and pH and by several drugs. However, the mechanisms that control channel gating are unclear. Here we present crystal structures of the human TREK-2 channel (up to 3.4 angstrom resolution) in two conformations and in complex with norfluoxetine, the active metabolite of fluoxetine (Prozac) and a state-dependent blocker of TREK channels. Norfluoxetine binds within intramembrane fenestrations found in only one of these two conformations. Channel activation by arachidonic acid and mechanical stretch involves conversion between these states through movement of the pore-lining helices. These results provide an explanation for TREK channel mechanosensitivity, regulation by diverse stimuli, and possible off-target effects of the serotonin reuptake inhibitor Prozac.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dong, Yin Yao -- Pike, Ashley C W -- Mackenzie, Alexandra -- McClenaghan, Conor -- Aryal, Prafulla -- Dong, Liang -- Quigley, Andrew -- Grieben, Mariana -- Goubin, Solenne -- Mukhopadhyay, Shubhashish -- Ruda, Gian Filippo -- Clausen, Michael V -- Cao, Lishuang -- Brennan, Paul E -- Burgess-Brown, Nicola A -- Sansom, Mark S P -- Tucker, Stephen J -- Carpenter, Elisabeth P -- 084655/Wellcome Trust/United Kingdom -- 092809/Z/10/Z/Wellcome Trust/United Kingdom -- Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2015 Mar 13;347(6227):1256-9. doi: 10.1126/science.1261512.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, UK. ; Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, UK. Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK. ; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK. OXION Initiative in Ion Channels and Disease, University of Oxford, Oxford OX1 3PN, UK. ; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK. OXION Initiative in Ion Channels and Disease, University of Oxford, Oxford OX1 3PN, UK. Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK. ; Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, UK. Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7FZ, UK. ; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK. ; Pfizer Neusentis, Granta Park, Cambridge CB21 6GS, UK. ; OXION Initiative in Ion Channels and Disease, University of Oxford, Oxford OX1 3PN, UK. Department of Biochemistry, University of Oxford, Oxford OX1 3QU, UK. ; Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK. OXION Initiative in Ion Channels and Disease, University of Oxford, Oxford OX1 3PN, UK. liz.carpenter@sgc.ox.ac.uk stephen.tucker@physics.ox.ac.uk. ; Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, UK. OXION Initiative in Ion Channels and Disease, University of Oxford, Oxford OX1 3PN, UK. liz.carpenter@sgc.ox.ac.uk stephen.tucker@physics.ox.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25766236" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arachidonic Acid/pharmacology ; Binding Sites ; Crystallography, X-Ray ; Fluoxetine/analogs & derivatives/chemistry/metabolism/pharmacology ; Humans ; *Ion Channel Gating ; Models, Molecular ; Molecular Dynamics Simulation ; Molecular Sequence Data ; Potassium/metabolism ; Potassium Channels, Tandem Pore Domain/antagonists & ; inhibitors/*chemistry/metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary
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  • 66
    Publication Date: 2015-11-07
    Description: Understanding the evolution of sex determination in plants requires identifying the mechanisms underlying the transition from monoecious plants, where male and female flowers coexist, to unisexual individuals found in dioecious species. We show that in melon and cucumber, the androecy gene controls female flower development and encodes a limiting enzyme of ethylene biosynthesis, ACS11. ACS11 is expressed in phloem cells connected to flowers programmed to become female, and ACS11 loss-of-function mutants lead to male plants (androecy). CmACS11 represses the expression of the male promoting gene CmWIP1 to control the development and the coexistence of male and female flowers in monoecious species. Because monoecy can lead to dioecy, we show how a combination of alleles of CmACS11 and CmWIP1 can create artificial dioecy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boualem, Adnane -- Troadec, Christelle -- Camps, Celine -- Lemhemdi, Afef -- Morin, Halima -- Sari, Marie-Agnes -- Fraenkel-Zagouri, Rina -- Kovalski, Irina -- Dogimont, Catherine -- Perl-Treves, Rafael -- Bendahmane, Abdelhafid -- New York, N.Y. -- Science. 2015 Nov 6;350(6261):688-91. doi: 10.1126/science.aac8370.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut National de la Recherche Agronomique (INRA), Institute of Plant Sciences Paris-Saclay, CNRS, Universite Paris-Sud, Universite d'Evry, Universite Paris-Diderot, Batiment 630, 91405, Orsay, France. ; Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS, UMR 8601, Universite Rene Descartes, Paris, France. ; The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel. ; INRA, UR 1052, Unite de Genetique et d'Amelioration des Fruits et Legumes, BP 94, F-84143 Montfavet, France. ; Institut National de la Recherche Agronomique (INRA), Institute of Plant Sciences Paris-Saclay, CNRS, Universite Paris-Sud, Universite d'Evry, Universite Paris-Diderot, Batiment 630, 91405, Orsay, France. bendahm@evry.inra.fr.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26542573" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; *Biological Evolution ; Cucumis sativus/enzymology/genetics/growth & development ; Cucurbitaceae/enzymology/genetics/*growth & development ; Ethylenes/biosynthesis ; Flowers/enzymology/genetics/*growth & development ; Genes, Plant/genetics/physiology ; Lyases/genetics/*physiology ; Molecular Sequence Data ; Phloem/enzymology/genetics/growth & development ; Plant Proteins/genetics/*physiology ; Sex Determination Processes/*genetics
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  • 67
    Publication Date: 2015-09-26
    Description: Cyclic guanosine monophosphate-adenosine monophosphate synthase (cGAS) detects intracellular DNA and signals through the adapter protein STING to initiate the antiviral response to DNA viruses. Whether DNA viruses can prevent activation of the cGAS-STING pathway remains largely unknown. Here, we identify the oncogenes of the DNA tumor viruses, including E7 from human papillomavirus (HPV) and E1A from adenovirus, as potent and specific inhibitors of the cGAS-STING pathway. We show that the LXCXE motif of these oncoproteins, which is essential for blockade of the retinoblastoma tumor suppressor, is also important for antagonizing DNA sensing. E1A and E7 bind to STING, and silencing of these oncogenes in human tumor cells restores the cGAS-STING pathway. Our findings reveal a host-virus conflict that may have shaped the evolution of viral oncogenes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lau, Laura -- Gray, Elizabeth E -- Brunette, Rebecca L -- Stetson, Daniel B -- New York, N.Y. -- Science. 2015 Oct 30;350(6260):568-71. doi: 10.1126/science.aab3291. Epub 2015 Sep 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA. ; Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA. stetson@uw.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26405230" target="_blank"〉PubMed〈/a〉
    Keywords: Adenovirus E1A Proteins/chemistry/genetics/*metabolism ; Amino Acid Motifs ; Amino Acid Sequence ; DNA Tumor Viruses/*immunology ; DNA, Neoplasm/immunology ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Evolution, Molecular ; HEK293 Cells ; HeLa Cells ; Host-Pathogen Interactions ; Humans ; Membrane Proteins/*antagonists & inhibitors ; Metabolic Networks and Pathways ; Molecular Sequence Data ; Nucleotides, Cyclic/*antagonists & inhibitors ; Oncogene Proteins, Viral/chemistry/genetics/*metabolism ; Retinoblastoma Protein/antagonists & inhibitors ; *Tumor Escape
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  • 68
    Publication Date: 2015-09-12
    Description: Podophyllotoxin is the natural product precursor of the chemotherapeutic etoposide, yet only part of its biosynthetic pathway is known. We used transcriptome mining in Podophyllum hexandrum (mayapple) to identify biosynthetic genes in the podophyllotoxin pathway. We selected 29 candidate genes to combinatorially express in Nicotiana benthamiana (tobacco) and identified six pathway enzymes, including an oxoglutarate-dependent dioxygenase that closes the core cyclohexane ring of the aryltetralin scaffold. By coexpressing 10 genes in tobacco-these 6 plus 4 previously discovered-we reconstitute the pathway to (-)-4'-desmethylepipodophyllotoxin (the etoposide aglycone), a naturally occurring lignan that is the immediate precursor of etoposide and, unlike podophyllotoxin, a potent topoisomerase inhibitor. Our results enable production of the etoposide aglycone in tobacco and circumvent the need for cultivation of mayapple and semisynthetic epimerization and demethylation of podophyllotoxin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lau, Warren -- Sattely, Elizabeth S -- DP2 AT008321/AT/NCCIH NIH HHS/ -- R00 GM089985/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Sep 11;349(6253):1224-8. doi: 10.1126/science.aac7202.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA. ; Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA. sattely@stanford.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26359402" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Biosynthetic Pathways/genetics ; Etoposide/*metabolism ; Gene Expression Regulation, Enzymologic ; Gene Expression Regulation, Plant ; *Genetic Engineering ; Methylation ; Mixed Function Oxygenases/genetics/*metabolism ; Molecular Sequence Data ; Podophyllotoxin/*analogs & derivatives/biosynthesis/*metabolism ; Podophyllum peltatum/*enzymology/genetics ; Tobacco/genetics/*metabolism ; Topoisomerase Inhibitors/*metabolism ; Transcriptome
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  • 69
    Publication Date: 2015-09-01
    Description: DNA strand exchange plays a central role in genetic recombination across all kingdoms of life, but the physical basis for these reactions remains poorly defined. Using single-molecule imaging, we found that bacterial RecA and eukaryotic Rad51 and Dmc1 all stabilize strand exchange intermediates in precise three-nucleotide steps. Each step coincides with an energetic signature (0.3 kBT) that is conserved from bacteria to humans. Triplet recognition is strictly dependent on correct Watson-Crick pairing. Rad51, RecA, and Dmc1 can all step over mismatches, but only Dmc1 can stabilize mismatched triplets. This finding provides insight into why eukaryotes have evolved a meiosis-specific recombinase. We propose that canonical Watson-Crick base triplets serve as the fundamental unit of pairing interactions during DNA recombination.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4580133/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4580133/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, Ja Yil -- Terakawa, Tsuyoshi -- Qi, Zhi -- Steinfeld, Justin B -- Redding, Sy -- Kwon, YoungHo -- Gaines, William A -- Zhao, Weixing -- Sung, Patrick -- Greene, Eric C -- CA146940/CA/NCI NIH HHS/ -- GM074739/GM/NIGMS NIH HHS/ -- R01 CA146940/CA/NCI NIH HHS/ -- R01 ES015252/ES/NIEHS NIH HHS/ -- R01 GM074739/GM/NIGMS NIH HHS/ -- R01ES015252/ES/NIEHS NIH HHS/ -- T32 GM007367/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Aug 28;349(6251):977-81. doi: 10.1126/science.aab2666.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA. ; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA. Department of Biophysics, Kyoto University, Sakyo, Kyoto, Japan. ; Department of Chemistry, Columbia University, New York, NY, USA. ; Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, CT, USA. ; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA. Howard Hughes Medical Institute, Columbia University, New York, NY, USA. ecg2108@cumc.columbia.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26315438" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Pairing ; Base Sequence ; Cell Cycle Proteins/chemistry/metabolism ; DNA/*chemistry/*metabolism ; DNA, Single-Stranded/metabolism ; DNA-Binding Proteins/chemistry/metabolism ; Escherichia coli Proteins/chemistry/metabolism ; Evolution, Molecular ; *Homologous Recombination ; Humans ; Meiosis ; Molecular Dynamics Simulation ; Molecular Sequence Data ; Rad51 Recombinase/chemistry/*metabolism ; Rec A Recombinases/chemistry/*metabolism ; Recombinases/chemistry/*metabolism ; Saccharomyces cerevisiae Proteins/chemistry/*metabolism ; Thermodynamics
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  • 70
    Publication Date: 2015-10-17
    Description: Transcriptional enhancers direct precise on-off patterns of gene expression during development. To explore the basis for this precision, we conducted a high-throughput analysis of the Otx-a enhancer, which mediates expression in the neural plate of Ciona embryos in response to fibroblast growth factor (FGF) signaling and a localized GATA determinant. We provide evidence that enhancer specificity depends on submaximal recognition motifs having reduced binding affinities ("suboptimization"). Native GATA and ETS (FGF) binding sites contain imperfect matches to consensus motifs. Perfect matches mediate robust but ectopic patterns of gene expression. The native sites are not arranged at optimal intervals, and subtle changes in their spacing alter enhancer activity. Multiple tiers of enhancer suboptimization produce specific, but weak, patterns of expression, and we suggest that clusters of weak enhancers, including certain "superenhancers," circumvent this trade-off in specificity and activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Farley, Emma K -- Olson, Katrina M -- Zhang, Wei -- Brandt, Alexander J -- Rokhsar, Daniel S -- Levine, Michael S -- GM46638/GM/NIGMS NIH HHS/ -- NS076542/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2015 Oct 16;350(6258):325-8. doi: 10.1126/science.aac6948.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, Division of Genetics, Genomics and Development, Center for Integrative Genomics, University of California, Berkeley, CA 94720-3200, USA. Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA. msl2@princeton.edu ekfarley@princeton.edu. ; Department of Molecular and Cell Biology, Division of Genetics, Genomics and Development, Center for Integrative Genomics, University of California, Berkeley, CA 94720-3200, USA. Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA. ; Department of Medicine, University of California, San Diego, CA 92093-0688, USA. ; Department of Chemistry, University of California, Berkeley, CA 94720-3200, USA. ; Department of Molecular and Cell Biology, Division of Genetics, Genomics and Development, Center for Integrative Genomics, University of California, Berkeley, CA 94720-3200, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26472909" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites ; Ciona intestinalis/genetics/*growth & development ; Consensus Sequence ; Enhancer Elements, Genetic/genetics/*physiology ; Fas-Associated Death Domain Protein/metabolism ; Fibroblast Growth Factors/*metabolism ; GATA Transcription Factors/*metabolism ; *Gene Expression Regulation, Developmental ; Molecular Sequence Data ; Organ Specificity/genetics/physiology ; Otx Transcription Factors/*metabolism
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  • 71
    Publication Date: 2015-01-13
    Description: NADPH/NADP(+) (the reduced form of NADP(+)/nicotinamide adenine dinucleotide phosphate) homeostasis is critical for countering oxidative stress in cells. Nicotinamide nucleotide transhydrogenase (TH), a membrane enzyme present in both bacteria and mitochondria, couples the proton motive force to the generation of NADPH. We present the 2.8 A crystal structure of the transmembrane proton channel domain of TH from Thermus thermophilus and the 6.9 A crystal structure of the entire enzyme (holo-TH). The membrane domain crystallized as a symmetric dimer, with each protomer containing a putative proton channel. The holo-TH is a highly asymmetric dimer with the NADP(H)-binding domain (dIII) in two different orientations. This unusual arrangement suggests a catalytic mechanism in which the two copies of dIII alternatively function in proton translocation and hydride transfer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479213/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4479213/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Leung, Josephine H -- Schurig-Briccio, Lici A -- Yamaguchi, Mutsuo -- Moeller, Arne -- Speir, Jeffrey A -- Gennis, Robert B -- Stout, Charles D -- 1R01GM103838-01A1/GM/NIGMS NIH HHS/ -- 5R01GM061545/GM/NIGMS NIH HHS/ -- GM073197/GM/NIGMS NIH HHS/ -- GM095600/GM/NIGMS NIH HHS/ -- P41 GM103310/GM/NIGMS NIH HHS/ -- P41GM103310/GM/NIGMS NIH HHS/ -- R01 GM061545/GM/NIGMS NIH HHS/ -- R01 GM095600/GM/NIGMS NIH HHS/ -- R01 GM103838/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Jan 9;347(6218):178-81. doi: 10.1126/science.1260451.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Department of Biochemistry, University of Illinois, Urbana, IL 61801, USA. ; National Resource for Automated Molecular Microscopy, The Scripps Research Institute, La Jolla, CA 92037, USA. ; Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. dave@scripps.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25574024" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Crystallography, X-Ray ; Molecular Sequence Data ; NADP Transhydrogenases/*chemistry ; Protein Multimerization ; Protein Structure, Tertiary ; *Protons ; Thermus thermophilus/enzymology
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  • 72
    Publication Date: 2015-01-31
    Description: The 18-kilodalton translocator protein (TSPO), proposed to be a key player in cholesterol transport into mitochondria, is highly expressed in steroidogenic tissues, metastatic cancer, and inflammatory and neurological diseases such as Alzheimer's and Parkinson's. TSPO ligands, including benzodiazepine drugs, are implicated in regulating apoptosis and are extensively used in diagnostic imaging. We report crystal structures (at 1.8, 2.4, and 2.5 angstrom resolution) of TSPO from Rhodobacter sphaeroides and a mutant that mimics the human Ala(147)--〉Thr(147) polymorphism associated with psychiatric disorders and reduced pregnenolone production. Crystals obtained in the lipidic cubic phase reveal the binding site of an endogenous porphyrin ligand and conformational effects of the mutation. The three crystal structures show the same tightly interacting dimer and provide insights into the controversial physiological role of TSPO and how the mutation affects cholesterol binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Fei -- Liu, Jian -- Zheng, Yi -- Garavito, R Michael -- Ferguson-Miller, Shelagh -- ACB-12002/PHS HHS/ -- AGM-12006/PHS HHS/ -- GM094625/GM/NIGMS NIH HHS/ -- GM26916/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Jan 30;347(6221):555-8. doi: 10.1126/science.1260590.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA. ; Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA. fergus20@msu.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25635101" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/*chemistry/*metabolism ; Binding Sites ; Cholesterol/metabolism ; Crystallography, X-Ray ; Humans ; Hydrogen Bonding ; Isoquinolines/metabolism ; Ligands ; Membrane Transport Proteins/*chemistry/*metabolism ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry ; Polymorphism, Single Nucleotide ; Porphyrins/metabolism ; Protein Conformation ; Protein Multimerization ; Protein Structure, Secondary ; Protoporphyrins/metabolism ; Receptors, GABA/chemistry/genetics ; Rhodobacter sphaeroides/*chemistry
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  • 73
    Publication Date: 2015-06-06
    Description: Retroviruses depend on self-assembly of their capsid proteins (core particle) to yield infectious mature virions. Despite the essential role of the retroviral core, its high polymorphism has hindered high-resolution structural analyses. Here, we report the x-ray structure of the native capsid (CA) protein from bovine leukemia virus. CA is organized as hexamers that deviate substantially from sixfold symmetry, yet adjust to make two-dimensional pseudohexagonal arrays that mimic mature retroviral cores. Intra- and interhexameric quasi-equivalent contacts are uncovered, with flexible trimeric lateral contacts among hexamers, yet preserving very similar dimeric interfaces making the lattice. The conformation of each capsid subunit in the hexamer is therefore dictated by long-range interactions, revealing how the hexamers can also assemble into closed core particles, a relevant feature of retrovirus biology.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Obal, G -- Trajtenberg, F -- Carrion, F -- Tome, L -- Larrieux, N -- Zhang, X -- Pritsch, O -- Buschiazzo, A -- New York, N.Y. -- Science. 2015 Jul 3;349(6243):95-8. doi: 10.1126/science.aaa5182. Epub 2015 Jun 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut Pasteur de Montevideo, Unit of Protein Biophysics, Mataojo 2020, 11400, Montevideo, Uruguay. Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la Republica, Avenida General Flores 2125, 11800, Montevideo, Uruguay. ; Institut Pasteur de Montevideo, Unit of Protein Crystallography, Mataojo 2020, 11400, Montevideo, Uruguay. ; Institut Pasteur de Montevideo, Unit of Protein Biophysics, Mataojo 2020, 11400, Montevideo, Uruguay. ; Institut Pasteur, Unite de Virologie Structurale, Departement de Virologie and CNRS Unite Mixte de Recherche 3569, 28, Rue du Docteur Roux, 75015, Paris, France. ; Institut Pasteur de Montevideo, Unit of Protein Biophysics, Mataojo 2020, 11400, Montevideo, Uruguay. Departamento de Inmunobiologia, Facultad de Medicina, Universidad de la Republica, Avenida General Flores 2125, 11800, Montevideo, Uruguay. pritsch@pasteur.edu.uy alebus@pasteur.edu.uy. ; Institut Pasteur de Montevideo, Unit of Protein Crystallography, Mataojo 2020, 11400, Montevideo, Uruguay. Institut Pasteur, Department of Structural Biology and Chemistry, 25, Rue du Dr Roux, 75015, Paris, France. pritsch@pasteur.edu.uy alebus@pasteur.edu.uy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26044299" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Capsid/*chemistry ; Capsid Proteins/*chemistry/genetics ; Cattle ; Crystallography, X-Ray ; Leukemia Virus, Bovine/*chemistry/genetics ; Molecular Sequence Data ; Mutation ; Protein Multimerization ; Protein Structure, Secondary
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  • 74
    Publication Date: 2015-06-27
    Description: Cardiac progenitor cells are multipotent and give rise to cardiac endothelium, smooth muscle, and cardiomyocytes. Here, we define and characterize the cardiomyoblast intermediate that is committed to the cardiomyocyte fate, and we characterize the niche signals that regulate commitment. Cardiomyoblasts express Hopx, which functions to coordinate local Bmp signals to inhibit the Wnt pathway, thus promoting cardiomyogenesis. Hopx integrates Bmp and Wnt signaling by physically interacting with activated Smads and repressing Wnt genes. The identification of the committed cardiomyoblast that retains proliferative potential will inform cardiac regenerative therapeutics. In addition, Bmp signals characterize adult stem cell niches in other tissues where Hopx-mediated inhibition of Wnt is likely to contribute to stem cell quiescence and to explain the role of Hopx as a tumor suppressor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jain, Rajan -- Li, Deqiang -- Gupta, Mudit -- Manderfield, Lauren J -- Ifkovits, Jamie L -- Wang, Qiaohong -- Liu, Feiyan -- Liu, Ying -- Poleshko, Andrey -- Padmanabhan, Arun -- Raum, Jeffrey C -- Li, Li -- Morrisey, Edward E -- Lu, Min Min -- Won, Kyoung-Jae -- Epstein, Jonathan A -- 5-T32-GM-007170/GM/NIGMS NIH HHS/ -- K08 HL119553/HL/NHLBI NIH HHS/ -- K08 HL119553-02/HL/NHLBI NIH HHS/ -- R01 HL071546/HL/NHLBI NIH HHS/ -- U01 HL100405/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2015 Jun 26;348(6242):aaa6071. doi: 10.1126/science.aaa6071.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, Penn Cardiovascular Institute, Institute of Regenerative Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA. ; Department of Genetics, Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA. ; Department of Cell and Developmental Biology, Penn Cardiovascular Institute, Institute of Regenerative Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA. epsteinj@upenn.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26113728" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bone Morphogenetic Proteins/genetics/*metabolism ; Cell Lineage/genetics ; Gene Expression ; *Gene Expression Regulation, Developmental ; Heart/*embryology ; Homeodomain Proteins/genetics/*metabolism ; Mice ; Mice, Mutant Strains ; Molecular Sequence Data ; Muscle, Smooth/cytology/metabolism ; Myoblasts, Cardiac/cytology/*metabolism ; Organogenesis/*genetics ; Stem Cell Niche/genetics/physiology ; Tumor Suppressor Proteins/genetics/*metabolism ; Wnt Signaling Pathway/*genetics
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  • 75
    Publication Date: 2015-01-09
    Description: The mechanistic target of rapamycin complex 1 (mTORC1) protein kinase is a master growth regulator that responds to multiple environmental cues. Amino acids stimulate, in a Rag-, Ragulator-, and vacuolar adenosine triphosphatase-dependent fashion, the translocation of mTORC1 to the lysosomal surface, where it interacts with its activator Rheb. Here, we identify SLC38A9, an uncharacterized protein with sequence similarity to amino acid transporters, as a lysosomal transmembrane protein that interacts with the Rag guanosine triphosphatases (GTPases) and Ragulator in an amino acid-sensitive fashion. SLC38A9 transports arginine with a high Michaelis constant, and loss of SLC38A9 represses mTORC1 activation by amino acids, particularly arginine. Overexpression of SLC38A9 or just its Ragulator-binding domain makes mTORC1 signaling insensitive to amino acid starvation but not to Rag activity. Thus, SLC38A9 functions upstream of the Rag GTPases and is an excellent candidate for being an arginine sensor for the mTORC1 pathway.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4295826/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4295826/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Shuyu -- Tsun, Zhi-Yang -- Wolfson, Rachel L -- Shen, Kuang -- Wyant, Gregory A -- Plovanich, Molly E -- Yuan, Elizabeth D -- Jones, Tony D -- Chantranupong, Lynne -- Comb, William -- Wang, Tim -- Bar-Peled, Liron -- Zoncu, Roberto -- Straub, Christoph -- Kim, Choah -- Park, Jiwon -- Sabatini, Bernardo L -- Sabatini, David M -- AI47389/AI/NIAID NIH HHS/ -- F30 CA180754/CA/NCI NIH HHS/ -- F31 AG044064/AG/NIA NIH HHS/ -- F31 CA180271/CA/NCI NIH HHS/ -- R01 CA103866/CA/NCI NIH HHS/ -- R37 AI047389/AI/NIAID NIH HHS/ -- T32 GM007287/GM/NIGMS NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Jan 9;347(6218):188-94. doi: 10.1126/science.1257132. Epub 2015 Jan 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Department of Biology, 9 Cambridge Center, Cambridge, MA 02142, USA. Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Koch Institute for Integrative Cancer Research, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. Broad Institute of Harvard and Massachusetts Institute of Technology, 7 Cambridge Center, Cambridge, MA 02142, USA. ; Harvard Medical School, 260 Longwood Avenue, Boston, MA 02115, USA. ; Department of Neurobiology, Howard Hughes Medical Institute, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115, USA. ; Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Department of Biology, 9 Cambridge Center, Cambridge, MA 02142, USA. Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Koch Institute for Integrative Cancer Research, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. Broad Institute of Harvard and Massachusetts Institute of Technology, 7 Cambridge Center, Cambridge, MA 02142, USA. sabatini@wi.mit.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25567906" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Transport Systems/chemistry/genetics/*metabolism ; Arginine/deficiency/*metabolism ; HEK293 Cells ; Humans ; Lysosomes/*enzymology ; Molecular Sequence Data ; Monomeric GTP-Binding Proteins/*metabolism ; Multiprotein Complexes/*metabolism ; Protein Structure, Tertiary ; Signal Transduction ; TOR Serine-Threonine Kinases/*metabolism
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  • 76
    Publication Date: 2015-02-01
    Description: During virus infection, the adaptor proteins MAVS and STING transduce signals from the cytosolic nucleic acid sensors RIG-I and cGAS, respectively, to induce type I interferons (IFNs) and other antiviral molecules. Here we show that MAVS and STING harbor two conserved serine and threonine clusters that are phosphorylated by the kinases IKK and/or TBK1 in response to stimulation. Phosphorylated MAVS and STING then bind to a positively charged surface of interferon regulatory factor 3 (IRF3) and thereby recruit IRF3 for its phosphorylation and activation by TBK1. We further show that TRIF, an adaptor protein in Toll-like receptor signaling, activates IRF3 through a similar phosphorylation-dependent mechanism. These results reveal that phosphorylation of innate adaptor proteins is an essential and conserved mechanism that selectively recruits IRF3 to activate the type I IFN pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Siqi -- Cai, Xin -- Wu, Jiaxi -- Cong, Qian -- Chen, Xiang -- Li, Tuo -- Du, Fenghe -- Ren, Junyao -- Wu, You-Tong -- Grishin, Nick V -- Chen, Zhijian J -- AI-93967/AI/NIAID NIH HHS/ -- GM-094575/GM/NIGMS NIH HHS/ -- GM-63692/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Mar 13;347(6227):aaa2630. doi: 10.1126/science.aaa2630. Epub 2015 Jan 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. ; Departments of Biophysics and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. ; Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. Howard Hughes Medical Institute (HHMI), University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. ; Departments of Biophysics and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. Howard Hughes Medical Institute (HHMI), University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. ; Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. Howard Hughes Medical Institute (HHMI), University of Texas Southwestern Medical Center, Dallas, TX 75390-9148, USA. zhijian.chen@utsouthwestern.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25636800" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/chemistry/*metabolism ; Adaptor Proteins, Vesicular Transport/chemistry/*metabolism ; Amino Acid Sequence ; Animals ; Cell Line ; Humans ; I-kappa B Kinase/metabolism ; Interferon Regulatory Factor-3/chemistry/*metabolism ; Interferon-alpha/biosynthesis ; Interferon-beta/biosynthesis ; Membrane Proteins/chemistry/*metabolism ; Mice ; Molecular Sequence Data ; Phosphorylation ; Protein Binding ; Protein Multimerization ; Protein-Serine-Threonine Kinases/metabolism ; Recombinant Proteins/metabolism ; Sendai virus/physiology ; Serine/metabolism ; Signal Transduction ; Ubiquitination ; Vesiculovirus/physiology
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  • 77
    Publication Date: 2015-12-19
    Description: Voltage-gated sodium (Nav) channels propagate action potentials in excitable cells. Accordingly, Nav channels are therapeutic targets for many cardiovascular and neurological disorders. Selective inhibitors have been challenging to design because the nine mammalian Nav channel isoforms share high sequence identity and remain recalcitrant to high-resolution structural studies. Targeting the human Nav1.7 channel involved in pain perception, we present a protein-engineering strategy that has allowed us to determine crystal structures of a novel receptor site in complex with isoform-selective antagonists. GX-936 and related inhibitors bind to the activated state of voltage-sensor domain IV (VSD4), where their anionic aryl sulfonamide warhead engages the fourth arginine gating charge on the S4 helix. By opposing VSD4 deactivation, these compounds inhibit Nav1.7 through a voltage-sensor trapping mechanism, likely by stabilizing inactivated states of the channel. Residues from the S2 and S3 helices are key determinants of isoform selectivity, and bound phospholipids implicate the membrane as a modulator of channel function and pharmacology. Our results help to elucidate the molecular basis of voltage sensing and establish structural blueprints to design selective Nav channel antagonists.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ahuja, Shivani -- Mukund, Susmith -- Deng, Lunbin -- Khakh, Kuldip -- Chang, Elaine -- Ho, Hoangdung -- Shriver, Stephanie -- Young, Clint -- Lin, Sophia -- Johnson, J P Jr -- Wu, Ping -- Li, Jun -- Coons, Mary -- Tam, Christine -- Brillantes, Bobby -- Sampang, Honorio -- Mortara, Kyle -- Bowman, Krista K -- Clark, Kevin R -- Estevez, Alberto -- Xie, Zhiwei -- Verschoof, Henry -- Grimwood, Michael -- Dehnhardt, Christoph -- Andrez, Jean-Christophe -- Focken, Thilo -- Sutherlin, Daniel P -- Safina, Brian S -- Starovasnik, Melissa A -- Ortwine, Daniel F -- Franke, Yvonne -- Cohen, Charles J -- Hackos, David H -- Koth, Christopher M -- Payandeh, Jian -- New York, N.Y. -- Science. 2015 Dec 18;350(6267):aac5464. doi: 10.1126/science.aac5464.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Structural Biology, Genentech Inc., South San Francisco, CA 94080, USA. ; Department of Neuroscience, Genentech Inc., South San Francisco, CA 94080, USA. ; Department of Biology, Xenon Pharmaceuticals Inc., Burnaby, British Columbia, V5G 4W8, Canada. ; Department of Discovery Chemistry, Genentech Inc., South San Francisco, CA 94080, USA. ; Department of Biochemical and Cellular Pharmacology, Genentech Inc., South San Francisco, CA 94080, USA. ; Department of Chemistry, Xenon Pharmaceuticals Inc., Burnaby, British Columbia, V5G 4W8, Canada. ; Department of Neuroscience, Genentech Inc., South San Francisco, CA 94080, USA. hackos.david@gene.com koth.christopher@gene.com payandeh.jian@gene.com. ; Department of Structural Biology, Genentech Inc., South San Francisco, CA 94080, USA. hackos.david@gene.com koth.christopher@gene.com payandeh.jian@gene.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26680203" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Membrane/chemistry ; Crystallization/methods ; Crystallography, X-Ray ; DNA Mutational Analysis ; Humans ; Models, Molecular ; Molecular Sequence Data ; NAV1.7 Voltage-Gated Sodium Channel/*chemistry/genetics ; Pain Perception/drug effects ; Protein Engineering ; Protein Isoforms/antagonists & inhibitors/chemistry ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Sodium Channel Blockers/*chemistry/*pharmacology ; Sulfonamides/*chemistry/*pharmacology ; Thiadiazoles/*chemistry/*pharmacology
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  • 78
    Publication Date: 2015-06-13
    Description: The spindle checkpoint of the cell division cycle senses kinetochores that are not attached to microtubules and prevents precocious onset of anaphase, which can lead to aneuploidy. The nuclear division cycle 80 complex (Ndc80C) is a major microtubule receptor at the kinetochore. Ndc80C also mediates the kinetochore recruitment of checkpoint proteins. We found that the checkpoint protein kinase monopolar spindle 1 (Mps1) directly bound to Ndc80C through two independent interactions. Both interactions involved the microtubule-binding surfaces of Ndc80C and were directly inhibited in the presence of microtubules. Elimination of one such interaction in human cells caused checkpoint defects expected from a failure to detect unattached kinetochores. Competition between Mps1 and microtubules for Ndc80C binding thus constitutes a direct mechanism for the detection of unattached kinetochores.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ji, Zhejian -- Gao, Haishan -- Yu, Hongtao -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):1260-4. doi: 10.1126/science.aaa4029.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX 74390, USA. ; Howard Hughes Medical Institute, Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX 74390, USA. hongtao.yu@utsouthwestern.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26068854" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding, Competitive ; *Cell Cycle ; Cell Cycle Proteins/genetics/*metabolism ; HeLa Cells ; Humans ; Kinetochores/*metabolism ; Microtubules/*metabolism ; Molecular Sequence Data ; Nuclear Proteins/*metabolism ; Protein Binding ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Protein-Tyrosine Kinases/genetics/*metabolism
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  • 79
    Publication Date: 2015-07-25
    Description: Lipid transfer between cell membrane bilayers at contacts between the endoplasmic reticulum (ER) and other membranes help to maintain membrane lipid homeostasis. We found that two similar ER integral membrane proteins, oxysterol-binding protein (OSBP)-related protein 5 (ORP5) and ORP8, tethered the ER to the plasma membrane (PM) via the interaction of their pleckstrin homology domains with phosphatidylinositol 4-phosphate (PI4P) in this membrane. Their OSBP-related domains (ORDs) harbored either PI4P or phosphatidylserine (PS) and exchanged these lipids between bilayers. Gain- and loss-of-function experiments showed that ORP5 and ORP8 could mediate PI4P/PS countertransport between the ER and the PM, thus delivering PI4P to the ER-localized PI4P phosphatase Sac1 for degradation and PS from the ER to the PM. This exchange helps to control plasma membrane PI4P levels and selectively enrich PS in the PM.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4638224/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4638224/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chung, Jeeyun -- Torta, Federico -- Masai, Kaori -- Lucast, Louise -- Czapla, Heather -- Tanner, Lukas B -- Narayanaswamy, Pradeep -- Wenk, Markus R -- Nakatsu, Fubito -- De Camilli, Pietro -- DA018343/DA/NIDA NIH HHS/ -- DK082700/DK/NIDDK NIH HHS/ -- DK45735/DK/NIDDK NIH HHS/ -- P30 DA018343/DA/NIDA NIH HHS/ -- P30 DK045735/DK/NIDDK NIH HHS/ -- R01 DK082700/DK/NIDDK NIH HHS/ -- R37 NS036251/NS/NINDS NIH HHS/ -- R37NS036251/NS/NINDS NIH HHS/ -- T32 GM007223/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Jul 24;349(6246):428-32. doi: 10.1126/science.aab1370.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Howard Hughes Medical Institute, Kavli Institute for Neuroscience, and Program for Cellular Neuroscience, Neurodegeneration, and Repair, Yale School of Medicine, New Haven, CT 06520, USA. ; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 117456 Singapore. ; Department of Cell Biology, Howard Hughes Medical Institute, Kavli Institute for Neuroscience, and Program for Cellular Neuroscience, Neurodegeneration, and Repair, Yale School of Medicine, New Haven, CT 06520, USA. pietro.decamilli@yale.edu nakatsu@med.niigata-u.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26206935" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Biological Transport ; Cell Membrane/*metabolism ; Endoplasmic Reticulum/*metabolism ; Gene Knockout Techniques ; HeLa Cells ; Humans ; Molecular Sequence Data ; Phosphatidylinositol Phosphates/*metabolism ; Phosphatidylserines/*metabolism ; Protein Structure, Tertiary ; Receptors, Steroid/chemistry/genetics/*metabolism
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  • 80
    Publication Date: 2015-03-15
    Description: Rgs2, a regulator of G proteins, lowers blood pressure by decreasing signaling through Galphaq. Human patients expressing Met-Leu-Rgs2 (ML-Rgs2) or Met-Arg-Rgs2 (MR-Rgs2) are hypertensive relative to people expressing wild-type Met-Gln-Rgs2 (MQ-Rgs2). We found that wild-type MQ-Rgs2 and its mutant, MR-Rgs2, were destroyed by the Ac/N-end rule pathway, which recognizes N(alpha)-terminally acetylated (Nt-acetylated) proteins. The shortest-lived mutant, ML-Rgs2, was targeted by both the Ac/N-end rule and Arg/N-end rule pathways. The latter pathway recognizes unacetylated N-terminal residues. Thus, the Nt-acetylated Ac-MX-Rgs2 (X = Arg, Gln, Leu) proteins are specific substrates of the mammalian Ac/N-end rule pathway. Furthermore, the Ac/N-degron of Ac-MQ-Rgs2 was conditional, and Teb4, an endoplasmic reticulum (ER) membrane-embedded ubiquitin ligase, was able to regulate G protein signaling by targeting Ac-MX-Rgs2 proteins for degradation through their N(alpha)-terminal acetyl group.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4748709/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4748709/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, Sang-Eun -- Kim, Jeong-Mok -- Seok, Ok-Hee -- Cho, Hanna -- Wadas, Brandon -- Kim, Seon-Young -- Varshavsky, Alexander -- Hwang, Cheol-Sang -- DK039520/DK/NIDDK NIH HHS/ -- GM031530/GM/NIGMS NIH HHS/ -- R01 DK039520/DK/NIDDK NIH HHS/ -- R01 GM031530/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Mar 13;347(6227):1249-52. doi: 10.1126/science.aaa3844.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, South Korea. ; Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA. ; Medical Genomics Research Center, KRIBB, Daejeon, South Korea. Department of Functional Genomics, University of Science and Technology, Daejeon, South Korea. ; Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA. cshwang@postech.ac.kr avarsh@caltech.edu. ; Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, South Korea. cshwang@postech.ac.kr avarsh@caltech.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25766235" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Amino Acid Sequence ; GTP-Binding Protein alpha Subunits, Gq-G11/metabolism ; HEK293 Cells ; HeLa Cells ; Humans ; Membrane Proteins/genetics/metabolism ; Mutant Proteins/chemistry/metabolism ; Protein Processing, Post-Translational ; Protein Stability ; Proteolysis ; RGS Proteins/chemistry/genetics/*metabolism ; Saccharomyces cerevisiae/genetics/metabolism ; Signal Transduction ; Ubiquitin-Protein Ligases/genetics/metabolism ; Ubiquitination
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  • 81
    Publication Date: 2015-10-17
    Description: Polycomb repressive complex 2 (PRC2) catalyzes histone H3K27 trimethylation (H3K27me3), a hallmark of gene silencing. Here we report the crystal structures of an active PRC2 complex of 170 kilodaltons from the yeast Chaetomium thermophilum in both basal and stimulated states, which contain Ezh2, Eed, and the VEFS domain of Suz12 and are bound to a cancer-associated inhibiting H3K27M peptide and a S-adenosyl-l-homocysteine cofactor. The stimulated complex also contains an additional stimulating H3K27me3 peptide. Eed is engulfed by a belt-like structure of Ezh2, and Suz12(VEFS) contacts both of these two subunits to confer an unusual split active SET domain for catalysis. Comparison of PRC2 in the basal and stimulated states reveals a mobile Ezh2 motif that responds to stimulation to allosterically regulate the active site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiao, Lianying -- Liu, Xin -- GM114576/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Oct 16;350(6258):aac4383. doi: 10.1126/science.aac4383. Epub 2015 Oct 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cecil H. and Ida Green Center for Reproductive Biology Sciences and Division of Basic Research, Department of Obstetrics and Gynecology and Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. ; Cecil H. and Ida Green Center for Reproductive Biology Sciences and Division of Basic Research, Department of Obstetrics and Gynecology and Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. xin.liu@utsouthwestern.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26472914" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Amino Acid Sequence ; Catalysis ; Catalytic Domain ; Chaetomium/genetics/*metabolism ; Crystallography, X-Ray ; Fungal Proteins/antagonists & inhibitors/*chemistry/metabolism ; *Gene Silencing ; Histones/*metabolism ; Humans ; Jumonji Domain-Containing Histone Demethylases/metabolism ; Methylation ; Molecular Sequence Data ; Mutation ; Neoplasms/genetics ; Polycomb Repressive Complex 2/antagonists & inhibitors/*chemistry/metabolism ; Protein Structure, Tertiary ; S-Adenosylhomocysteine/chemistry/metabolism ; Transcription, Genetic
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  • 82
    Publication Date: 2015-06-27
    Description: Algal blooms produce large amounts of dimethyl sulfide (DMS), a volatile with a diverse signaling role in marine food webs that is emitted to the atmosphere, where it can affect cloud formation. The algal enzymes responsible for forming DMS from dimethylsulfoniopropionate (DMSP) remain unidentified despite their critical role in the global sulfur cycle. We identified and characterized Alma1, a DMSP lyase from the bloom-forming algae Emiliania huxleyi. Alma1 is a tetrameric, redox-sensitive enzyme of the aspartate racemase superfamily. Recombinant Alma1 exhibits biochemical features identical to the DMSP lyase in E. huxleyi, and DMS released by various E. huxleyi isolates correlates with their Alma1 levels. Sequence homology searches suggest that Alma1 represents a gene family present in major, globally distributed phytoplankton taxa and in other marine organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Alcolombri, Uria -- Ben-Dor, Shifra -- Feldmesser, Ester -- Levin, Yishai -- Tawfik, Dan S -- Vardi, Assaf -- New York, N.Y. -- Science. 2015 Jun 26;348(6242):1466-9. doi: 10.1126/science.aab1586.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel. Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel. ; Bioinformatics and Biological Computing Unit, Biological Services, Weizmann Institute of Science, Rehovot 76100, Israel. ; Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Rehovot 76100, Israel. ; Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel. assaf.vardi@weizmann.ac.il dan.tawfik@weizmann.ac.il. ; Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel. assaf.vardi@weizmann.ac.il dan.tawfik@weizmann.ac.il.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26113722" target="_blank"〉PubMed〈/a〉
    Keywords: Algal Proteins/*chemistry/classification/genetics ; Amino Acid Sequence ; Bacteria/enzymology/genetics ; Carbon-Sulfur Lyases/*chemistry/classification/genetics ; Haptophyta/*enzymology/genetics ; Molecular Sequence Data ; Phylogeny ; Phytoplankton/enzymology ; RNA, Messenger/biosynthesis ; Recombinant Proteins/chemistry ; Sulfides/*metabolism
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  • 83
    Publication Date: 2015-09-26
    Description: Mitochondria fulfill central functions in cellular energetics, metabolism, and signaling. The outer membrane translocator complex (the TOM complex) imports most mitochondrial proteins, but its architecture is unknown. Using a cross-linking approach, we mapped the active translocator down to single amino acid residues, revealing different transport paths for preproteins through the Tom40 channel. An N-terminal segment of Tom40 passes from the cytosol through the channel to recruit chaperones from the intermembrane space that guide the transfer of hydrophobic preproteins. The translocator contains three Tom40 beta-barrel channels sandwiched between a central alpha-helical Tom22 receptor cluster and external regulatory Tom proteins. The preprotein-translocating trimeric complex exchanges with a dimeric isoform to assemble new TOM complexes. Dynamic coupling of alpha-helical receptors, beta-barrel channels, and chaperones generates a versatile machinery that transports about 1000 different proteins.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shiota, Takuya -- Imai, Kenichiro -- Qiu, Jian -- Hewitt, Victoria L -- Tan, Khershing -- Shen, Hsin-Hui -- Sakiyama, Noriyuki -- Fukasawa, Yoshinori -- Hayat, Sikander -- Kamiya, Megumi -- Elofsson, Arne -- Tomii, Kentaro -- Horton, Paul -- Wiedemann, Nils -- Pfanner, Nikolaus -- Lithgow, Trevor -- Endo, Toshiya -- New York, N.Y. -- Science. 2015 Sep 25;349(6255):1544-8. doi: 10.1126/science.aac6428.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria 3800, Australia. Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan. ; Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology, 2-4-7 Aomi, Koto-ku, Tokyo 135-0064, Japan. ; Institut fur Biochemie und Molekularbiologie, Universitat Freiburg, 79104 Freiburg, Germany. ; Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, Victoria 3800, Australia. ; Department of Biochemistry and Biophysics and Science for Life Laboratory, Stockholm University, Box 1031, 17121 Solna, Sweden. ; Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan. ; Institut fur Biochemie und Molekularbiologie, Universitat Freiburg, 79104 Freiburg, Germany. Centre for Biological Signalling Studies, Universitat Freiburg, 79104 Freiburg, Germany. ; Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan. Faculty of Life Sciences, Kyoto Sangyo University, Kamigamo-motoyama, Kita-ku, Kyoto 603-8555, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26404837" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cytosol/metabolism ; Mitochondrial Membrane Transport Proteins/*chemistry/metabolism ; Molecular Chaperones ; Molecular Sequence Data ; Protein Multimerization ; Protein Structure, Secondary ; Protein Transport ; Saccharomyces cerevisiae Proteins/*chemistry/metabolism
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  • 84
    Publication Date: 2015-10-31
    Description: Transcription factors (TFs) bind specific sequences in promoter-proximal and -distal DNA elements to regulate gene transcription. RNA is transcribed from both of these DNA elements, and some DNA binding TFs bind RNA. Hence, RNA transcribed from regulatory elements may contribute to stable TF occupancy at these sites. We show that the ubiquitously expressed TF Yin-Yang 1 (YY1) binds to both gene regulatory elements and their associated RNA species across the entire genome. Reduced transcription of regulatory elements diminishes YY1 occupancy, whereas artificial tethering of RNA enhances YY1 occupancy at these elements. We propose that RNA makes a modest but important contribution to the maintenance of certain TFs at gene regulatory elements and suggest that transcription of regulatory elements produces a positive-feedback loop that contributes to the stability of gene expression programs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4720525/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4720525/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sigova, Alla A -- Abraham, Brian J -- Ji, Xiong -- Molinie, Benoit -- Hannett, Nancy M -- Guo, Yang Eric -- Jangi, Mohini -- Giallourakis, Cosmas C -- Sharp, Phillip A -- Young, Richard A -- HG002668/HG/NHGRI NIH HHS/ -- R01 HG002668/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2015 Nov 20;350(6263):978-81. doi: 10.1126/science.aad3346. Epub 2015 Oct 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. ; Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA. ; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA. David H. Koch Institute for Integrative Cancer Research, Cambridge, MA 02140, USA. ; Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA. young@wi.mit.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26516199" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Binding Sites ; Cell Line ; Consensus Sequence ; DNA/metabolism ; Embryonic Stem Cells/metabolism ; *Enhancer Elements, Genetic ; *Gene Expression Regulation ; Mice ; *Promoter Regions, Genetic ; RNA, Messenger/*metabolism ; *Transcription, Genetic ; YY1 Transcription Factor/*metabolism
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  • 85
    Publication Date: 2015-02-24
    Description: Notch receptors guide mammalian cell fate decisions by engaging the proteins Jagged and Delta-like (DLL). The 2.3 angstrom resolution crystal structure of the interacting regions of the Notch1-DLL4 complex reveals a two-site, antiparallel binding orientation assisted by Notch1 O-linked glycosylation. Notch1 epidermal growth factor-like repeats 11 and 12 interact with the DLL4 Delta/Serrate/Lag-2 (DSL) domain and module at the N-terminus of Notch ligands (MNNL) domains, respectively. Threonine and serine residues on Notch1 are functionalized with O-fucose and O-glucose, which act as surrogate amino acids by making specific, and essential, contacts to residues on DLL4. The elucidation of a direct chemical role for O-glycans in Notch1 ligand engagement demonstrates how, by relying on posttranslational modifications of their ligand binding sites, Notch proteins have linked their functional capacity to developmentally regulated biosynthetic pathways.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4445638/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4445638/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Luca, Vincent C -- Jude, Kevin M -- Pierce, Nathan W -- Nachury, Maxence V -- Fischer, Suzanne -- Garcia, K Christopher -- 1R01-GM097015/GM/NIGMS NIH HHS/ -- R01 GM097015/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Feb 20;347(6224):847-53. doi: 10.1126/science.1261093.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. ; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. ; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. kcgarcia@stanford.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25700513" target="_blank"〉PubMed〈/a〉
    Keywords: Alagille Syndrome/genetics ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Cell Line ; Conserved Sequence ; Crystallography, X-Ray ; Fucose/chemistry ; Glucose/chemistry ; Glycosylation ; Intracellular Signaling Peptides and Proteins/*chemistry/genetics ; Ligands ; Membrane Proteins/*chemistry/genetics/ultrastructure ; Molecular Sequence Data ; Molecular Targeted Therapy ; Polysaccharides/chemistry ; Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy/genetics ; Protein Binding ; Protein Structure, Tertiary ; Rats ; Receptor, Notch1/*chemistry/genetics/ultrastructure ; Serine/chemistry/genetics ; Threonine/chemistry/genetics
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 86
    Publication Date: 2015-02-14
    Description: Nucleotide analog inhibitors have shown clinical success in the treatment of hepatitis C virus (HCV) infection, despite an incomplete mechanistic understanding of NS5B, the viral RNA-dependent RNA polymerase. Here we study the details of HCV RNA replication by determining crystal structures of stalled polymerase ternary complexes with enzymes, RNA templates, RNA primers, incoming nucleotides, and catalytic metal ions during both primed initiation and elongation of RNA synthesis. Our analysis revealed that highly conserved active-site residues in NS5B position the primer for in-line attack on the incoming nucleotide. A beta loop and a C-terminal membrane-anchoring linker occlude the active-site cavity in the apo state, retract in the primed initiation assembly to enforce replication of the HCV genome from the 3' terminus, and vacate the active-site cavity during elongation. We investigated the incorporation of nucleotide analog inhibitors, including the clinically active metabolite formed by sofosbuvir, to elucidate key molecular interactions in the active site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Appleby, Todd C -- Perry, Jason K -- Murakami, Eisuke -- Barauskas, Ona -- Feng, Joy -- Cho, Aesop -- Fox, David 3rd -- Wetmore, Diana R -- McGrath, Mary E -- Ray, Adrian S -- Sofia, Michael J -- Swaminathan, S -- Edwards, Thomas E -- New York, N.Y. -- Science. 2015 Feb 13;347(6223):771-5. doi: 10.1126/science.1259210.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gilead Sciences, 333 Lakeside Drive, Foster City, CA 94404, USA. todd.appleby@gilead.com tedwards@be4.com. ; Gilead Sciences, 333 Lakeside Drive, Foster City, CA 94404, USA. ; Beryllium, 7869 NE Day Road West, Bainbridge Island, WA 98110, USA. ; Beryllium, 7869 NE Day Road West, Bainbridge Island, WA 98110, USA. todd.appleby@gilead.com tedwards@be4.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25678663" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Catalytic Domain ; Conserved Sequence ; Crystallography, X-Ray ; Hepacivirus/enzymology/genetics/*physiology ; Molecular Sequence Data ; Protein Structure, Secondary ; RNA Replicase/*chemistry ; RNA, Viral/*biosynthesis ; Ribonucleotides/*chemistry ; Sofosbuvir ; Uridine Monophosphate/analogs & derivatives/chemistry ; Viral Nonstructural Proteins/*chemistry ; *Virus Replication
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  • 87
    Publication Date: 2015-02-14
    Description: Although it is generally accepted that cellular differentiation requires changes to transcriptional networks, dynamic regulation of promoters and enhancers at specific sets of genes has not been previously studied en masse. Exploiting the fact that active promoters and enhancers are transcribed, we simultaneously measured their activity in 19 human and 14 mouse time courses covering a wide range of cell types and biological stimuli. Enhancer RNAs, then messenger RNAs encoding transcription factors, dominated the earliest responses. Binding sites for key lineage transcription factors were simultaneously overrepresented in enhancers and promoters active in each cellular system. Our data support a highly generalizable model in which enhancer transcription is the earliest event in successive waves of transcriptional change during cellular differentiation or activation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681433/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681433/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arner, Erik -- Daub, Carsten O -- Vitting-Seerup, Kristoffer -- Andersson, Robin -- Lilje, Berit -- Drablos, Finn -- Lennartsson, Andreas -- Ronnerblad, Michelle -- Hrydziuszko, Olga -- Vitezic, Morana -- Freeman, Tom C -- Alhendi, Ahmad M N -- Arner, Peter -- Axton, Richard -- Baillie, J Kenneth -- Beckhouse, Anthony -- Bodega, Beatrice -- Briggs, James -- Brombacher, Frank -- Davis, Margaret -- Detmar, Michael -- Ehrlund, Anna -- Endoh, Mitsuhiro -- Eslami, Afsaneh -- Fagiolini, Michela -- Fairbairn, Lynsey -- Faulkner, Geoffrey J -- Ferrai, Carmelo -- Fisher, Malcolm E -- Forrester, Lesley -- Goldowitz, Daniel -- Guler, Reto -- Ha, Thomas -- Hara, Mitsuko -- Herlyn, Meenhard -- Ikawa, Tomokatsu -- Kai, Chieko -- Kawamoto, Hiroshi -- Khachigian, Levon M -- Klinken, S Peter -- Kojima, Soichi -- Koseki, Haruhiko -- Klein, Sarah -- Mejhert, Niklas -- Miyaguchi, Ken -- Mizuno, Yosuke -- Morimoto, Mitsuru -- Morris, Kelly J -- Mummery, Christine -- Nakachi, Yutaka -- Ogishima, Soichi -- Okada-Hatakeyama, Mariko -- Okazaki, Yasushi -- Orlando, Valerio -- Ovchinnikov, Dmitry -- Passier, Robert -- Patrikakis, Margaret -- Pombo, Ana -- Qin, Xian-Yang -- Roy, Sugata -- Sato, Hiroki -- Savvi, Suzana -- Saxena, Alka -- Schwegmann, Anita -- Sugiyama, Daisuke -- Swoboda, Rolf -- Tanaka, Hiroshi -- Tomoiu, Andru -- Winteringham, Louise N -- Wolvetang, Ernst -- Yanagi-Mizuochi, Chiyo -- Yoneda, Misako -- Zabierowski, Susan -- Zhang, Peter -- Abugessaisa, Imad -- Bertin, Nicolas -- Diehl, Alexander D -- Fukuda, Shiro -- Furuno, Masaaki -- Harshbarger, Jayson -- Hasegawa, Akira -- Hori, Fumi -- Ishikawa-Kato, Sachi -- Ishizu, Yuri -- Itoh, Masayoshi -- Kawashima, Tsugumi -- Kojima, Miki -- Kondo, Naoto -- Lizio, Marina -- Meehan, Terrence F -- Mungall, Christopher J -- Murata, Mitsuyoshi -- Nishiyori-Sueki, Hiromi -- Sahin, Serkan -- Nagao-Sato, Sayaka -- Severin, Jessica -- de Hoon, Michiel J L -- Kawai, Jun -- Kasukawa, Takeya -- Lassmann, Timo -- Suzuki, Harukazu -- Kawaji, Hideya -- Summers, Kim M -- Wells, Christine -- FANTOM Consortium -- Hume, David A -- Forrest, Alistair R R -- Sandelin, Albin -- Carninci, Piero -- Hayashizaki, Yoshihide -- P30 CA010815/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2015 Feb 27;347(6225):1010-4. doi: 10.1126/science.1259418. Epub 2015 Feb 12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25678556" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Cattle ; Cell Differentiation/*genetics ; Dogs ; *Enhancer Elements, Genetic ; *Gene Expression Regulation, Developmental ; Mice ; RNA, Messenger/genetics/metabolism ; Rats ; Stem Cells/*cytology/metabolism ; Transcription Factors/*metabolism ; *Transcription, Genetic
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  • 88
    Publication Date: 2015-12-19
    Description: The voltage-gated calcium channel Ca(v)1.1 is engaged in the excitation-contraction coupling of skeletal muscles. The Ca(v)1.1 complex consists of the pore-forming subunit alpha1 and auxiliary subunits alpha2delta, beta, and gamma. We report the structure of the rabbit Ca(v)1.1 complex determined by single-particle cryo-electron microscopy. The four homologous repeats of the alpha1 subunit are arranged clockwise in the extracellular view. The gamma subunit, whose structure resembles claudins, interacts with the voltage-sensing domain of repeat IV (VSD(IV)), whereas the cytosolic beta subunit is located adjacent to VSD(II) of alpha1. The alpha2 subunit interacts with the extracellular loops of repeats I to III through its VWA and Cache1 domains. The structure reveals the architecture of a prototypical eukaryotic Ca(v) channel and provides a framework for understanding the function and disease mechanisms of Ca(v) and Na(v) channels.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Jianping -- Yan, Zhen -- Li, Zhangqiang -- Yan, Chuangye -- Lu, Shan -- Dong, Mengqiu -- Yan, Nieng -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Dec 18;350(6267):aad2395. doi: 10.1126/science.aad2395.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory of Membrane Biology, Tsinghua University, Beijing 100084, China. Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, China. Center for Structural Biology, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China. ; National Institute of Biological Sciences, Beijing 102206, China. ; State Key Laboratory of Membrane Biology, Tsinghua University, Beijing 100084, China. Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, China. Center for Structural Biology, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China. nyan@tsinghua.edu.cn.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26680202" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium Channels, L-Type/*chemistry/genetics/isolation & purification ; Cell Membrane/chemistry ; Cryoelectron Microscopy ; Molecular Sequence Data ; Muscle, Skeletal/chemistry ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/isolation & purification ; Rabbits
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  • 89
    Publication Date: 2015-06-27
    Description: Light-gated rhodopsin cation channels from chlorophyte algae have transformed neuroscience research through their use as membrane-depolarizing optogenetic tools for targeted photoactivation of neuron firing. Photosuppression of neuronal action potentials has been limited by the lack of equally efficient tools for membrane hyperpolarization. We describe anion channel rhodopsins (ACRs), a family of light-gated anion channels from cryptophyte algae that provide highly sensitive and efficient membrane hyperpolarization and neuronal silencing through light-gated chloride conduction. ACRs strictly conducted anions, completely excluding protons and larger cations, and hyperpolarized the membrane of cultured animal cells with much faster kinetics at less than one-thousandth of the light intensity required by the most efficient currently available optogenetic proteins. Natural ACRs provide optogenetic inhibition tools with unprecedented light sensitivity and temporal precision.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4764398/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4764398/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Govorunova, Elena G -- Sineshchekov, Oleg A -- Janz, Roger -- Liu, Xiaoqin -- Spudich, John L -- R01 GM027750/GM/NIGMS NIH HHS/ -- R01GM027750/GM/NIGMS NIH HHS/ -- R21MH098288/MH/NIMH NIH HHS/ -- S10RR022531/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2015 Aug 7;349(6248):647-50. doi: 10.1126/science.aaa7484. Epub 2015 Jun 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Membrane Biology, Department of Biochemistry and Molecular Biology, University of Texas Medical School, Houston, TX 77030, USA. ; Department of Neurobiology and Anatomy, University of Texas Medical School, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26113638" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Chloride Channels/classification/genetics/*physiology ; Cryptophyta/genetics/*metabolism ; HEK293 Cells ; Humans ; Ion Channel Gating ; Light ; Membrane Potentials/physiology/*radiation effects ; Molecular Sequence Data ; Neural Inhibition ; Neurons/physiology/*radiation effects ; Optogenetics/*methods ; Photic Stimulation ; Phylogeny ; Rhodopsins, Microbial/classification/genetics/*physiology ; Transfection
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  • 90
    Publication Date: 2015-04-04
    Description: Mammalian mitochondrial ribosomes (mitoribosomes) synthesize mitochondrially encoded membrane proteins that are critical for mitochondrial function. Here we present the complete atomic structure of the porcine 55S mitoribosome at 3.8 angstrom resolution by cryo-electron microscopy and chemical cross-linking/mass spectrometry. The structure of the 28S subunit in the complex was resolved at 3.6 angstrom resolution by focused alignment, which allowed building of a detailed atomic structure including all of its 15 mitoribosomal-specific proteins. The structure reveals the intersubunit contacts in the 55S mitoribosome, the molecular architecture of the mitoribosomal messenger RNA (mRNA) binding channel and its interaction with transfer RNAs, and provides insight into the highly specialized mechanism of mRNA recruitment to the 28S subunit. Furthermore, the structure contributes to a mechanistic understanding of aminoglycoside ototoxicity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Greber, Basil J -- Bieri, Philipp -- Leibundgut, Marc -- Leitner, Alexander -- Aebersold, Ruedi -- Boehringer, Daniel -- Ban, Nenad -- New York, N.Y. -- Science. 2015 Apr 17;348(6232):303-8. doi: 10.1126/science.aaa3872. Epub 2015 Apr 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Institute of Molecular Biology and Biophysics, Otto-Stern-Weg 5, ETH Zurich, CH-8093 Zurich, Switzerland. ; Department of Biology, Institute of Molecular Systems Biology, Auguste-Piccard-Hof 1, ETH Zurich, CH-8093 Zurich, Switzerland. ; Department of Biology, Institute of Molecular Systems Biology, Auguste-Piccard-Hof 1, ETH Zurich, CH-8093 Zurich, Switzerland. Faculty of Science, University of Zurich, CH-8057 Zurich, Switzerland. ; Department of Biology, Institute of Molecular Biology and Biophysics, Otto-Stern-Weg 5, ETH Zurich, CH-8093 Zurich, Switzerland. ban@mol.biol.ethz.ch.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25837512" target="_blank"〉PubMed〈/a〉
    Keywords: Aminoglycosides/chemistry ; Animals ; Anti-Bacterial Agents/chemistry ; Binding Sites ; GTP-Binding Proteins/chemistry ; Humans ; Mitochondria/*ultrastructure ; Mitochondrial Membranes/ultrastructure ; Mitochondrial Proteins/*biosynthesis/genetics ; Mutation ; Nucleic Acid Conformation ; Protein Structure, Secondary ; RNA, Messenger/chemistry ; RNA, Ribosomal, 16S/chemistry ; RNA, Transfer/chemistry ; Ribosomal Proteins/chemistry ; Ribosome Subunits, Large/chemistry/physiology/*ultrastructure ; Swine
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  • 91
    Publication Date: 2015-06-06
    Description: The detailed molecular interactions between native HIV-1 capsid protein (CA) hexamers that shield the viral genome and proteins have been elusive. We report crystal structures describing interactions between CA monomers related by sixfold symmetry within hexamers (intrahexamer) and threefold and twofold symmetry between neighboring hexamers (interhexamer). The structures describe how CA builds hexagonal lattices, the foundation of mature capsids. Lattice structure depends on an adaptable hydration layer modulating interactions among CA molecules. Disruption of this layer alters interhexamer interfaces, highlighting an inherent structural variability. A CA-targeting antiviral affects capsid stability by binding across CA molecules and subtly altering interhexamer interfaces remote to the ligand-binding site. Inherent structural plasticity, hydration layer rearrangement, and effector binding affect capsid stability and have functional implications for the retroviral life cycle.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4584149/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4584149/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gres, Anna T -- Kirby, Karen A -- KewalRamani, Vineet N -- Tanner, John J -- Pornillos, Owen -- Sarafianos, Stefan G -- AI076119/AI/NIAID NIH HHS/ -- AI099284/AI/NIAID NIH HHS/ -- AI100890/AI/NIAID NIH HHS/ -- AI112417/AI/NIAID NIH HHS/ -- AI120860/AI/NIAID NIH HHS/ -- GM066087/GM/NIGMS NIH HHS/ -- GM103368/GM/NIGMS NIH HHS/ -- P50 GM103368/GM/NIGMS NIH HHS/ -- R01 AI076119/AI/NIAID NIH HHS/ -- R01 AI099284/AI/NIAID NIH HHS/ -- R01 AI100890/AI/NIAID NIH HHS/ -- R01 AI120860/AI/NIAID NIH HHS/ -- R01 GM066087/GM/NIGMS NIH HHS/ -- R21 AI112417/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2015 Jul 3;349(6243):99-103. doi: 10.1126/science.aaa5936. Epub 2015 Jun 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA. Department of Chemistry, University of Missouri, Columbia, MO 65211, USA. ; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA. Department of Molecular Microbiology and Immunology, University of Missouri School of Medicine, Columbia, MO 65211, USA. ; Basic Research Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA. ; Department of Chemistry, University of Missouri, Columbia, MO 65211, USA. Department of Biochemistry, University of Missouri, Columbia, MO 65211, USA. ; Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA. ; Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, USA. Department of Molecular Microbiology and Immunology, University of Missouri School of Medicine, Columbia, MO 65211, USA. Department of Biochemistry, University of Missouri, Columbia, MO 65211, USA. sarafianoss@missouri.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26044298" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Capsid/*chemistry ; Crystallography, X-Ray ; HIV-1/*chemistry/genetics ; Molecular Sequence Data ; Protein Multimerization ; Protein Structure, Secondary ; gag Gene Products, Human Immunodeficiency Virus/*chemistry/genetics
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  • 92
    Publication Date: 2015-04-25
    Description: In cells, biosynthetic machinery coordinates protein synthesis and folding to optimize efficiency and minimize off-pathway outcomes. However, it has been difficult to delineate experimentally the mechanisms responsible. Using fluorescence resonance energy transfer, we studied cotranslational folding of the first nucleotide-binding domain from the cystic fibrosis transmembrane conductance regulator. During synthesis, folding occurred discretely via sequential compaction of N-terminal, alpha-helical, and alpha/beta-core subdomains. Moreover, the timing of these events was critical; premature alpha-subdomain folding prevented subsequent core formation. This process was facilitated by modulating intrinsic folding propensity in three distinct ways: delaying alpha-subdomain compaction, facilitating beta-strand intercalation, and optimizing translation kinetics via codon usage. Thus, de novo folding is translationally tuned by an integrated cellular response that shapes the cotranslational folding landscape at critical stages of synthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Soo Jung -- Yoon, Jae Seok -- Shishido, Hideki -- Yang, Zhongying -- Rooney, LeeAnn A -- Barral, Jose M -- Skach, William R -- P30CA069533/CA/NCI NIH HHS/ -- P30EYE010572/PHS HHS/ -- R01DK51818/DK/NIDDK NIH HHS/ -- R01GM53457/GM/NIGMS NIH HHS/ -- S10OD012246/OD/NIH HHS/ -- S10RR025571/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2015 Apr 24;348(6233):444-8. doi: 10.1126/science.aaa3974.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, Oregon Health and Science University (OHSU), Portland, OR 97239, USA. ; Department of Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, TX 77550-0620, USA. Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX 77550-0620, USA. ; Department of Biochemistry and Molecular Biology, Oregon Health and Science University (OHSU), Portland, OR 97239, USA. Cystic Fibrosis Foundation Therapeutics, Bethesda, MD 20814, USA. skachw@ohsu.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25908822" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Codon/chemistry/*metabolism ; Cystic Fibrosis Transmembrane Conductance ; Regulator/*biosynthesis/*chemistry/genetics ; Fluorescence Resonance Energy Transfer ; Humans ; Kinetics ; Molecular Sequence Data ; *Peptide Chain Elongation, Translational ; *Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Ribosomes/chemistry/metabolism
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  • 93
    Publication Date: 2015-01-24
    Description: Chemokines and their receptors control cell migration during development, immune system responses, and in numerous diseases, including inflammation and cancer. The structural basis of receptor:chemokine recognition has been a long-standing unanswered question due to the challenges of structure determination for membrane protein complexes. Here, we report the crystal structure of the chemokine receptor CXCR4 in complex with the viral chemokine antagonist vMIP-II at 3.1 angstrom resolution. The structure revealed a 1:1 stoichiometry and a more extensive binding interface than anticipated from the paradigmatic two-site model. The structure helped rationalize a large body of mutagenesis data and together with modeling provided insights into CXCR4 interactions with its endogenous ligand CXCL12, its ability to recognize diverse ligands, and the specificity of CC and CXC receptors for their respective chemokines.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4362693/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4362693/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Qin, Ling -- Kufareva, Irina -- Holden, Lauren G -- Wang, Chong -- Zheng, Yi -- Zhao, Chunxia -- Fenalti, Gustavo -- Wu, Huixian -- Han, Gye Won -- Cherezov, Vadim -- Abagyan, Ruben -- Stevens, Raymond C -- Handel, Tracy M -- ACB-12002/PHS HHS/ -- AGM-12006/PHS HHS/ -- R01 GM071872/GM/NIGMS NIH HHS/ -- R01 GM081763/GM/NIGMS NIH HHS/ -- R21 AI101687/AI/NIAID NIH HHS/ -- U01 GM094612/GM/NIGMS NIH HHS/ -- U54 GM094618/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Mar 6;347(6226):1117-22. doi: 10.1126/science.1261064. Epub 2015 Jan 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of California, San Diego, Skaggs School of Pharmacy and Pharmaceutical Sciences, La Jolla, CA 92093, USA. ; University of California, San Diego, Skaggs School of Pharmacy and Pharmaceutical Sciences, La Jolla, CA 92093, USA. thandel@ucsd.edu stevens@usc.edu ikufareva@ucsd.edu. ; Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA. ; Department of Chemistry, Bridge Institute. Department of Biological Sciences, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA. ; Department of Chemistry, Bridge Institute. ; Department of Chemistry, Bridge Institute. Department of Biological Sciences, Bridge Institute, University of Southern California, Los Angeles, CA 90089, USA. thandel@ucsd.edu stevens@usc.edu ikufareva@ucsd.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25612609" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Chemokine CXCL12/chemistry ; Chemokines/*chemistry ; Crystallography, X-Ray ; Drug Design ; Humans ; Models, Chemical ; Molecular Sequence Data ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Receptors, CXCR4/agonists/antagonists & inhibitors/*chemistry ; Structural Homology, Protein
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  • 94
    Publication Date: 2015-08-01
    Description: The inefficient clearance of dying cells can lead to abnormal immune responses, such as unresolved inflammation and autoimmune conditions. We show that tumor suppressor p53 controls signaling-mediated phagocytosis of apoptotic cells through its target, Death Domain1alpha (DD1alpha), which suggests that p53 promotes both the proapoptotic pathway and postapoptotic events. DD1alpha appears to function as an engulfment ligand or receptor that engages in homophilic intermolecular interaction at intercellular junctions of apoptotic cells and macrophages, unlike other typical scavenger receptors that recognize phosphatidylserine on the surface of dead cells. DD1alpha-deficient mice showed in vivo defects in clearing dying cells, which led to multiple organ damage indicative of immune dysfunction. p53-induced expression of DD1alpha thus prevents persistence of cell corpses and ensures efficient generation of precise immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yoon, Kyoung Wan -- Byun, Sanguine -- Kwon, Eunjeong -- Hwang, So-Young -- Chu, Kiki -- Hiraki, Masatsugu -- Jo, Seung-Hee -- Weins, Astrid -- Hakroush, Samy -- Cebulla, Angelika -- Sykes, David B -- Greka, Anna -- Mundel, Peter -- Fisher, David E -- Mandinova, Anna -- Lee, Sam W -- CA142805/CA/NCI NIH HHS/ -- CA149477/CA/NCI NIH HHS/ -- CA80058/CA/NCI NIH HHS/ -- DK062472/DK/NIDDK NIH HHS/ -- DK091218/DK/NIDDK NIH HHS/ -- DK093378/DK/NIDDK NIH HHS/ -- DK57683/DK/NIDDK NIH HHS/ -- S10RR027673/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2015 Jul 31;349(6247):1261669. doi: 10.1126/science.1261669.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, MA 02129, USA. ; Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA. ; Division of Nephrology, Department of Medicine, Massachusetts General Hospital, Boston, MA 02114, USA. ; Center for Regenerative Medicine and Technology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA. ; Department of Medicine, Glom-NExT Center for Glomerular Kidney Disease and Novel Experimental Therapeutics, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA. ; Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, MA 02129, USA. Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, MA 02142, USA. ; Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Building 149, 13th Street, Charlestown, MA 02129, USA. Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, MA 02142, USA. swlee@mgh.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26228159" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Apoptosis/genetics/*immunology ; Autoimmune Diseases/genetics/immunology ; Cell Line, Tumor ; Female ; Humans ; Inflammation/genetics/immunology ; Macrophages/immunology ; Male ; Membrane Proteins/genetics/*metabolism ; Mice ; Mice, Knockout ; Molecular Sequence Data ; Phagocytosis/*immunology ; Phosphatidylserines/*metabolism ; Signal Transduction ; Tumor Suppressor Protein p53/*metabolism
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  • 95
    Publication Date: 2015-09-01
    Description: The nuclear pore complex (NPC) constitutes the sole gateway for bidirectional nucleocytoplasmic transport. We present the reconstitution and interdisciplinary analyses of the ~425-kilodalton inner ring complex (IRC), which forms the central transport channel and diffusion barrier of the NPC, revealing its interaction network and equimolar stoichiometry. The Nsp1*Nup49*Nup57 channel nucleoporin heterotrimer (CNT) attaches to the IRC solely through the adaptor nucleoporin Nic96. The CNT*Nic96 structure reveals that Nic96 functions as an assembly sensor that recognizes the three-dimensional architecture of the CNT, thereby mediating the incorporation of a defined CNT state into the NPC. We propose that the IRC adopts a relatively rigid scaffold that recruits the CNT to primarily form the diffusion barrier of the NPC, rather than enabling channel dilation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stuwe, Tobias -- Bley, Christopher J -- Thierbach, Karsten -- Petrovic, Stefan -- Schilbach, Sandra -- Mayo, Daniel J -- Perriches, Thibaud -- Rundlet, Emily J -- Jeon, Young E -- Collins, Leslie N -- Huber, Ferdinand M -- Lin, Daniel H -- Paduch, Marcin -- Koide, Akiko -- Lu, Vincent -- Fischer, Jessica -- Hurt, Ed -- Koide, Shohei -- Kossiakoff, Anthony A -- Hoelz, Andre -- ACB-12002/PHS HHS/ -- AGM-12006/PHS HHS/ -- P30-CA014599/CA/NCI NIH HHS/ -- R01-GM090324/GM/NIGMS NIH HHS/ -- R01-GM111461/GM/NIGMS NIH HHS/ -- U01-GM094588/GM/NIGMS NIH HHS/ -- U54-GM087519/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Oct 2;350(6256):56-64. doi: 10.1126/science.aac9176. Epub 2015 Aug 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉California Institute of Technology, Division of Chemistry and Chemical Engineering, 1200 East California Boulevard, Pasadena, CA 91125, USA. ; Department of Biochemistry and Molecular Biology, The University of Chicago, Chicago, IL 60637, USA. ; Biochemistry Center of Heidelberg University, 69120 Heidelberg, Germany. ; California Institute of Technology, Division of Chemistry and Chemical Engineering, 1200 East California Boulevard, Pasadena, CA 91125, USA. hoelz@caltech.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26316600" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Chaetomium/metabolism/*ultrastructure ; Fungal Proteins/chemistry/*ultrastructure ; Molecular Sequence Data ; Nuclear Pore/metabolism/*ultrastructure ; Nuclear Pore Complex Proteins/chemistry/*ultrastructure ; Nuclear Proteins/chemistry/*ultrastructure ; Protein Binding ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary
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  • 96
    Publication Date: 2015-09-19
    Description: A wide variety of RNAs encode small open-reading-frame (smORF/sORF) peptides, but their functions are largely unknown. Here, we show that Drosophila polished-rice (pri) sORF peptides trigger proteasome-mediated protein processing, converting the Shavenbaby (Svb) transcription repressor into a shorter activator. A genome-wide RNA interference screen identifies an E2-E3 ubiquitin-conjugating complex, UbcD6-Ubr3, which targets Svb to the proteasome in a pri-dependent manner. Upon interaction with Ubr3, Pri peptides promote the binding of Ubr3 to Svb. Ubr3 can then ubiquitinate the Svb N terminus, which is degraded by the proteasome. The C-terminal domains protect Svb from complete degradation and ensure appropriate processing. Our data show that Pri peptides control selectivity of Ubr3 binding, which suggests that the family of sORF peptides may contain an extended repertoire of protein regulators.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zanet, J -- Benrabah, E -- Li, T -- Pelissier-Monier, A -- Chanut-Delalande, H -- Ronsin, B -- Bellen, H J -- Payre, F -- Plaza, S -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Sep 18;349(6254):1356-8. doi: 10.1126/science.aac5677.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre de Biologie du Developpement, Universite de Toulouse III-Paul Sabatier, Batiment 4R3, 118 route de Narbonne, F-31062 Toulouse, France. CNRS, UMR5547, Centre de Biologie du Developpement, F-31062 Toulouse, France. ; Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA. ; Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA. Department of Molecular and Human Genetics, Howard Hughes Medical Institute, Neurological Research Institute, Baylor College of Medicine, Houston, TX 77030, USA. ; Centre de Biologie du Developpement, Universite de Toulouse III-Paul Sabatier, Batiment 4R3, 118 route de Narbonne, F-31062 Toulouse, France. CNRS, UMR5547, Centre de Biologie du Developpement, F-31062 Toulouse, France. francois.payre@univ-tlse3.fr serge.plaza@univ-tlse3.f.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26383956" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; Drosophila Proteins/chemistry/genetics/*metabolism ; Drosophila melanogaster/enzymology/genetics/*metabolism ; Gene Expression Regulation ; Molecular Sequence Data ; Open Reading Frames ; Peptides/genetics/*metabolism ; Proteasome Endopeptidase Complex/*metabolism ; Protein Structure, Tertiary ; *Proteolysis ; RNA Interference ; Transcription Factors/chemistry/genetics/*metabolism ; Ubiquitin-Conjugating Enzymes/metabolism ; Ubiquitin-Protein Ligases/metabolism ; Ubiquitination
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  • 97
    Publication Date: 2015-01-31
    Description: Translocator proteins (TSPOs) bind steroids and porphyrins, and they are implicated in many human diseases, for which they serve as biomarkers and therapeutic targets. TSPOs have tryptophan-rich sequences that are highly conserved from bacteria to mammals. Here we report crystal structures for Bacillus cereus TSPO (BcTSPO) down to 1.7 A resolution, including a complex with the benzodiazepine-like inhibitor PK11195. We also describe BcTSPO-mediated protoporphyrin IX (PpIX) reactions, including catalytic degradation to a previously undescribed heme derivative. We used structure-inspired mutations to investigate reaction mechanisms, and we showed that TSPOs from Xenopus and man have similar PpIX-directed activities. Although TSPOs have been regarded as transporters, the catalytic activity in PpIX degradation suggests physiological importance for TSPOs in protection against oxidative stress.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4341906/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4341906/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guo, Youzhong -- Kalathur, Ravi C -- Liu, Qun -- Kloss, Brian -- Bruni, Renato -- Ginter, Christopher -- Kloppmann, Edda -- Rost, Burkhard -- Hendrickson, Wayne A -- GM095315/GM/NIGMS NIH HHS/ -- GM107462/GM/NIGMS NIH HHS/ -- R01 GM107462/GM/NIGMS NIH HHS/ -- U54 GM075026/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Jan 30;347(6221):551-5. doi: 10.1126/science.aaa1534.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA. ; The New York Consortium on Membrane Protein Structure (NYCOMPS), New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA. ; The New York Consortium on Membrane Protein Structure (NYCOMPS), New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA. New York Structural Biology Center, Synchrotron Beamlines, Brookhaven National Laboratory, Upton, NY 11973, USA. ; The New York Consortium on Membrane Protein Structure (NYCOMPS), New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA. Department of Informatics, Bioinformatics and Computational Biology, Technische Universitat Munchen, Garching 85748, Germany. ; Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032, USA. The New York Consortium on Membrane Protein Structure (NYCOMPS), New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA. New York Structural Biology Center, Synchrotron Beamlines, Brookhaven National Laboratory, Upton, NY 11973, USA. Department of Physiology and Cellular Biophysics, Columbia University, New York, NY 10032, USA. wayne@xtl.cumc.columbia.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25635100" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacillus cereus/*chemistry ; Bacterial Proteins/*chemistry/*metabolism ; Binding Sites ; Crystallography, X-Ray ; Isoquinolines/metabolism ; Ligands ; Membrane Transport Proteins/*chemistry/*metabolism ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Protein Conformation ; Protein Multimerization ; Protein Structure, Secondary ; Protein Subunits/chemistry ; Protoporphyrins/metabolism ; Reactive Oxygen Species/metabolism ; Tryptophan/analysis
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  • 98
    Publication Date: 2015-05-09
    Description: In the fruit fly Drosophila, head formation is driven by a single gene, bicoid, which generates head-to-tail polarity of the main embryonic axis. Bicoid deficiency results in embryos with tail-to-tail polarity and no head. However, most insects lack bicoid, and the molecular mechanism for establishing head-to-tail polarity is poorly understood. We have identified a gene that establishes head-to-tail polarity of the mosquito-like midge, Chironomus riparius. This gene, named panish, encodes a cysteine-clamp DNA binding domain and operates through a different mechanism than bicoid. This finding, combined with the observation that the phylogenetic distributions of panish and bicoid are limited to specific families of flies, reveals frequent evolutionary changes of body axis determinants and a remarkable opportunity to study gene regulatory network evolution.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4449817/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4449817/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klomp, Jeff -- Athy, Derek -- Kwan, Chun Wai -- Bloch, Natasha I -- Sandmann, Thomas -- Lemke, Steffen -- Schmidt-Ott, Urs -- 1R03HD67700-01A1/HD/NICHD NIH HHS/ -- R03 HD067700/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2015 May 29;348(6238):1040-2. doi: 10.1126/science.aaa7105. Epub 2015 May 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA. ; Division of Signaling and Functional Genomics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany. ; Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA. uschmid@uchicago.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25953821" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Body Patterning/*genetics ; Chironomidae/*embryology/genetics ; DNA-Binding Proteins/classification/genetics/*physiology ; Embryo, Nonmammalian/*embryology ; Evolution, Molecular ; Gene Expression Regulation, Developmental ; Gene Regulatory Networks ; Homeodomain Proteins/classification/genetics/*physiology ; Molecular Sequence Data ; Phylogeny ; Protein Structure, Tertiary/genetics ; Trans-Activators/classification/genetics/*physiology
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  • 99
    Publication Date: 2015-04-18
    Description: Measles is a highly contagious human disease. We used cryo-electron microscopy and single particle-based helical image analysis to determine the structure of the helical nucleocapsid formed by the folded domain of the measles virus nucleoprotein encapsidating an RNA at a resolution of 4.3 angstroms. The resulting pseudoatomic model of the measles virus nucleocapsid offers important insights into the mechanism of the helical polymerization of nucleocapsids of negative-strand RNA viruses, in particular via the exchange subdomains of the nucleoprotein. The structure reveals the mode of the nucleoprotein-RNA interaction and explains why each nucleoprotein of measles virus binds six nucleotides, whereas the respiratory syncytial virus nucleoprotein binds seven. It provides a rational basis for further analysis of measles virus replication and transcription, and reveals potential targets for drug design.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gutsche, Irina -- Desfosses, Ambroise -- Effantin, Gregory -- Ling, Wai Li -- Haupt, Melina -- Ruigrok, Rob W H -- Sachse, Carsten -- Schoehn, Guy -- New York, N.Y. -- Science. 2015 May 8;348(6235):704-7. doi: 10.1126/science.aaa5137. Epub 2015 Apr 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CNRS, Unit for Virus Host-Cell Interactions, 38042 Grenoble, France. Universite Grenoble Alpes, Unit for Virus Host-Cell Interactions, 38042 Grenoble, France. gutsche@embl.fr. ; Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69917 Heidelberg, Germany. ; CNRS, Unit for Virus Host-Cell Interactions, 38042 Grenoble, France. Universite Grenoble Alpes, Unit for Virus Host-Cell Interactions, 38042 Grenoble, France. ; Universite Grenoble Alpes, IBS, 38044 Grenoble, France. CNRS, IBS, 38044 Grenoble, France. CEA, IBS, 38044 Grenoble, France. ; Institut Laue-Langevin, 38000 Grenoble, France. ; CNRS, Unit for Virus Host-Cell Interactions, 38042 Grenoble, France. Universite Grenoble Alpes, Unit for Virus Host-Cell Interactions, 38042 Grenoble, France. Universite Grenoble Alpes, IBS, 38044 Grenoble, France. CNRS, IBS, 38044 Grenoble, France. CEA, IBS, 38044 Grenoble, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25883315" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cryoelectron Microscopy ; Humans ; Measles/*virology ; Measles virus/chemistry/*ultrastructure ; Molecular Sequence Data ; Nucleic Acid Conformation ; Nucleocapsid/chemistry/*ultrastructure ; Nucleoproteins/chemistry/ultrastructure ; Protein Structure, Secondary ; RNA, Viral/chemistry/ultrastructure ; Viral Proteins/chemistry/ultrastructure
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  • 100
    Publication Date: 2015-11-21
    Description: Eukaryotic cells coordinate growth with the availability of nutrients through the mechanistic target of rapamycin complex 1 (mTORC1), a master growth regulator. Leucine is of particular importance and activates mTORC1 via the Rag guanosine triphosphatases and their regulators GATOR1 and GATOR2. Sestrin2 interacts with GATOR2 and is a leucine sensor. Here we present the 2.7 angstrom crystal structure of Sestrin2 in complex with leucine. Leucine binds through a single pocket that coordinates its charged functional groups and confers specificity for the hydrophobic side chain. A loop encloses leucine and forms a lid-latch mechanism required for binding. A structure-guided mutation in Sestrin2 that decreases its affinity for leucine leads to a concomitant increase in the leucine concentration required for mTORC1 activation in cells. These results provide a structural mechanism of amino acid sensing by the mTORC1 pathway.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698039/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698039/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Saxton, Robert A -- Knockenhauer, Kevin E -- Wolfson, Rachel L -- Chantranupong, Lynne -- Pacold, Michael E -- Wang, Tim -- Schwartz, Thomas U -- Sabatini, David M -- AI47389/AI/NIAID NIH HHS/ -- F30 CA189333/CA/NCI NIH HHS/ -- F31 CA180271/CA/NCI NIH HHS/ -- F31 CA189437/CA/NCI NIH HHS/ -- P41 GM103403/GM/NIGMS NIH HHS/ -- R01 AI047389/AI/NIAID NIH HHS/ -- R01 CA103866/CA/NCI NIH HHS/ -- R01CA103866/CA/NCI NIH HHS/ -- S10 RR029205/RR/NCRR NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- T32GM007287/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Jan 1;351(6268):53-8. doi: 10.1126/science.aad2087. Epub 2015 Nov 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA. Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA. Howard Hughes Medical Institute, Department of Biology, MIT, Cambridge, MA 02139, USA. Koch Institute for Integrative Cancer Research, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, MA 02142, USA. ; Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA. ; Department of Biology, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA. Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA. Howard Hughes Medical Institute, Department of Biology, MIT, Cambridge, MA 02139, USA. Koch Institute for Integrative Cancer Research, 77 Massachusetts Avenue, Cambridge, MA 02139, USA. Broad Institute of Harvard and MIT, 7 Cambridge Center, Cambridge, MA 02142, USA. sabatini@wi.mit.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26586190" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Crystallography, X-Ray ; HEK293 Cells ; Humans ; Leucine/*chemistry/metabolism ; Metabolic Networks and Pathways ; Molecular Sequence Data ; Multiprotein Complexes/chemistry/genetics/*metabolism ; Mutation ; Nuclear Proteins/*chemistry/metabolism ; Protein Binding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; TOR Serine-Threonine Kinases/chemistry/genetics/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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