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  • 1
    Publication Date: 2015-07-24
    Description: Bacteria secrete peptides and proteins to communicate, to poison competitors, and to manipulate host cells. Among the various protein-translocation machineries, the peptidase-containing ATP-binding cassette transporters (PCATs) are appealingly simple. Each PCAT contains two peptidase domains that cleave the secretion signal from the substrate, two transmembrane domains that form a translocation pathway, and two nucleotide-binding domains that hydrolyse ATP. In Gram-positive bacteria, PCATs function both as maturation proteases and exporters for quorum-sensing or antimicrobial polypeptides. In Gram-negative bacteria, PCATs interact with two other membrane proteins to form the type 1 secretion system. Here we present crystal structures of PCAT1 from Clostridium thermocellum in two different conformations. These structures, accompanied by biochemical data, show that the translocation pathway is a large alpha-helical barrel sufficient to accommodate small folded proteins. ATP binding alternates access to the transmembrane pathway and also regulates the protease activity, thereby coupling substrate processing to translocation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, David Yin-wei -- Huang, Shuo -- Chen, Jue -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Jul 23;523(7561):425-30. doi: 10.1038/nature14623.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Laboratory of Membrane Biology and Biophysics, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA [2] Howard Hughes Medical Institute, 1230 York Avenue, New York, New York 10065, USA. ; Howard Hughes Medical Institute, 1230 York Avenue, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26201595" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Binding Cassette Transporters/*chemistry/metabolism ; Adenosine Triphosphate/deficiency/metabolism ; Clostridium thermocellum/*chemistry ; Crystallography, X-Ray ; Models, Molecular ; Peptides/*metabolism/secretion ; Protein Binding ; Protein Multimerization ; Protein Structure, Tertiary ; Structure-Activity Relationship
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  • 2
    Publication Date: 2015-04-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibney, Elizabeth -- Cressey, Daniel -- England -- Nature. 2015 Apr 2;520(7545):16-7. doi: 10.1038/520016a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25832385" target="_blank"〉PubMed〈/a〉
    Keywords: *Federal Government ; Great Britain ; *Politics ; Science/economics/*legislation & jurisprudence/trends
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  • 3
    Publication Date: 2015-02-20
    Description: Pluripotent stem cells provide a powerful system to dissect the underlying molecular dynamics that regulate cell fate changes during mammalian development. Here we report the integrative analysis of genome-wide binding data for 38 transcription factors with extensive epigenome and transcriptional data across the differentiation of human embryonic stem cells to the three germ layers. We describe core regulatory dynamics and show the lineage-specific behaviour of selected factors. In addition to the orchestrated remodelling of the chromatin landscape, we find that the binding of several transcription factors is strongly associated with specific loss of DNA methylation in one germ layer, and in many cases a reciprocal gain in the other layers. Taken together, our work shows context-dependent rewiring of transcription factor binding, downstream signalling effectors, and the epigenome during human embryonic stem cell differentiation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4499331/" 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/PMC4499331/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tsankov, Alexander M -- Gu, Hongcang -- Akopian, Veronika -- Ziller, Michael J -- Donaghey, Julie -- Amit, Ido -- Gnirke, Andreas -- Meissner, Alexander -- 5F32DK095537/DK/NIDDK NIH HHS/ -- P01 GM099117/GM/NIGMS NIH HHS/ -- P01GM099117/GM/NIGMS NIH HHS/ -- P50HG006193/HG/NHGRI NIH HHS/ -- U01 ES017155/ES/NIEHS NIH HHS/ -- U01ES017155/ES/NIEHS NIH HHS/ -- England -- Nature. 2015 Feb 19;518(7539):344-9. doi: 10.1038/nature14233.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA [3] Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, Massachusetts 02138, USA. ; Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA. ; 1] Harvard Stem Cell Institute, Cambridge, Massachusetts 02138, USA [2] Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, Massachusetts 02138, USA. ; 1] Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, USA [2] Department of Immunology, Weizmann Institute, Rehovot, 76100 Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25693565" target="_blank"〉PubMed〈/a〉
    Keywords: *Cell Differentiation/genetics ; Cell Lineage ; Chromatin/chemistry/genetics/metabolism ; Chromatin Assembly and Disassembly/genetics ; DNA Methylation ; Embryonic Stem Cells/*cytology/*metabolism ; Enhancer Elements, Genetic/genetics ; Epigenesis, Genetic/genetics ; Epigenomics ; Genome, Human/genetics ; Germ Layers/cytology/metabolism ; Histones/chemistry/metabolism ; Humans ; Protein Binding ; Signal Transduction ; Transcription Factors/*metabolism ; Transcription, Genetic/genetics
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  • 4
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    Nature Publishing Group (NPG)
    Publication Date: 2015-11-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Macilwain, Colin -- England -- Nature. 2015 Nov 19;527(7578):277. doi: 10.1038/527277a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26581256" target="_blank"〉PubMed〈/a〉
    Keywords: Faculty/standards ; *Freedom ; Germany ; Great Britain ; Scotland ; Students ; United States ; Universities/legislation & jurisprudence/*manpower/*organization & administration
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  • 5
    Publication Date: 2015-09-30
    Description: The battle for survival between bacteria and the viruses that infect them (phages) has led to the evolution of many bacterial defence systems and phage-encoded antagonists of these systems. Clustered regularly interspaced short palindromic repeats (CRISPR) and the CRISPR-associated (cas) genes comprise an adaptive immune system that is one of the most widespread means by which bacteria defend themselves against phages. We identified the first examples of proteins produced by phages that inhibit a CRISPR-Cas system. Here we performed biochemical and in vivo investigations of three of these anti-CRISPR proteins, and show that each inhibits CRISPR-Cas activity through a distinct mechanism. Two block the DNA-binding activity of the CRISPR-Cas complex, yet do this by interacting with different protein subunits, and using steric or non-steric modes of inhibition. The third anti-CRISPR protein operates by binding to the Cas3 helicase-nuclease and preventing its recruitment to the DNA-bound CRISPR-Cas complex. In vivo, this anti-CRISPR can convert the CRISPR-Cas system into a transcriptional repressor, providing the first example-to our knowledge-of modulation of CRISPR-Cas activity by a protein interactor. The diverse sequences and mechanisms of action of these anti-CRISPR proteins imply an independent evolution, and foreshadow the existence of other means by which proteins may alter CRISPR-Cas function.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bondy-Denomy, Joseph -- Garcia, Bianca -- Strum, Scott -- Du, Mingjian -- Rollins, MaryClare F -- Hidalgo-Reyes, Yurima -- Wiedenheft, Blake -- Maxwell, Karen L -- Davidson, Alan R -- MOP-130482/Canadian Institutes of Health Research/Canada -- MOP-136845/Canadian Institutes of Health Research/Canada -- P20GM103500/GM/NIGMS NIH HHS/ -- R01GM108888/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Oct 1;526(7571):136-9. doi: 10.1038/nature15254. Epub 2015 Sep 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; Department of Biochemistry, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; Department of Microbiology and Immunology, Montana State University, Bozeman, Montana 59717, USA. ; Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26416740" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*metabolism/*virology ; Bacteriophages/*metabolism ; CRISPR-Associated Proteins/*antagonists & inhibitors/metabolism ; CRISPR-Cas Systems/genetics/*physiology ; Clustered Regularly Interspaced Short Palindromic Repeats/genetics ; DNA Helicases/antagonists & inhibitors/metabolism ; DNA, Viral/metabolism ; DNA-Binding Proteins/antagonists & inhibitors/metabolism ; Endonucleases/antagonists & inhibitors/metabolism ; *Evolution, Molecular ; Protein Binding ; Protein Subunits/antagonists & inhibitors/metabolism ; Repressor Proteins/genetics/metabolism ; Substrate Specificity ; Viral Proteins/*metabolism
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  • 6
    Publication Date: 2015-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gibney, Elizabeth -- England -- Nature. 2015 Dec 3;528(7580):20. doi: 10.1038/nature.2015.18878.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26632569" target="_blank"〉PubMed〈/a〉
    Keywords: *Budgets ; *Federal Government ; Financing, Government/economics ; Great Britain ; Research/*economics ; *Research Personnel/economics ; Research Support as Topic/*economics
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  • 7
    Publication Date: 2015-06-05
    Description: The endoplasmic reticulum (ER) is the largest intracellular endomembrane system, enabling protein and lipid synthesis, ion homeostasis, quality control of newly synthesized proteins and organelle communication. Constant ER turnover and modulation is needed to meet different cellular requirements and autophagy has an important role in this process. However, its underlying regulatory mechanisms remain unexplained. Here we show that members of the FAM134 reticulon protein family are ER-resident receptors that bind to autophagy modifiers LC3 and GABARAP, and facilitate ER degradation by autophagy ('ER-phagy'). Downregulation of FAM134B protein in human cells causes an expansion of the ER, while FAM134B overexpression results in ER fragmentation and lysosomal degradation. Mutant FAM134B proteins that cause sensory neuropathy in humans are unable to act as ER-phagy receptors. Consistently, disruption of Fam134b in mice causes expansion of the ER, inhibits ER turnover, sensitizes cells to stress-induced apoptotic cell death and leads to degeneration of sensory neurons. Therefore, selective ER-phagy via FAM134 proteins is indispensable for mammalian cell homeostasis and controls ER morphology and turnover in mice and humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Khaminets, Aliaksandr -- Heinrich, Theresa -- Mari, Muriel -- Grumati, Paolo -- Huebner, Antje K -- Akutsu, Masato -- Liebmann, Lutz -- Stolz, Alexandra -- Nietzsche, Sandor -- Koch, Nicole -- Mauthe, Mario -- Katona, Istvan -- Qualmann, Britta -- Weis, Joachim -- Reggiori, Fulvio -- Kurth, Ingo -- Hubner, Christian A -- Dikic, Ivan -- England -- Nature. 2015 Jun 18;522(7556):354-8. doi: 10.1038/nature14498. Epub 2015 Jun 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Biochemistry II, Goethe University School of Medicine, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany. ; Institute of Human Genetics, Jena University Hospital, Friedrich-Schiller-University Jena, Kollegiengasse 10, 07743 Jena, Germany. ; 1] Department of Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands [2] Department of Cell Biology, University Medical Center Utrecht, University of Groningen, Antonious Deusinglaan 1, 3713 AV Groningen, The Netherlands. ; Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Riedberg Campus, Max-von-Laue-Strasse 15, 60438 Frankfurt am Main, Germany. ; Electron Microscopy Center, Jena University Hospital, Friedrich-Schiller-University Jena, Ziegelmuhlenweg 1, 07743 Jena, Germany. ; Institute for Biochemistry I, Jena University Hospital, Friedrich-Schiller-University Jena, 07743 Jena, Germany. ; Institute of Neuropathology, RWTH Aachen University Hospital, Pauwelsstr. 30, 52074 Aachen, Germany. ; 1] Institute of Biochemistry II, Goethe University School of Medicine, Theodor-Stern-Kai 7, 60590 Frankfurt am Main, Germany [2] Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Riedberg Campus, Max-von-Laue-Strasse 15, 60438 Frankfurt am Main, Germany [3] Institute of Immunology, School of Medicine University of Split, Mestrovicevo setaliste bb, 21 000 Split, Croatia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26040720" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/metabolism ; Animals ; Apoptosis ; Autophagy/*physiology ; Biomarkers/metabolism ; Cell Line ; Endoplasmic Reticulum/chemistry/*metabolism ; Female ; Gene Deletion ; Humans ; Lysosomes/metabolism ; Male ; Membrane Proteins/deficiency/genetics/*metabolism ; Mice ; Microtubule-Associated Proteins/metabolism ; Neoplasm Proteins/deficiency/genetics/*metabolism ; Phagosomes/metabolism ; Protein Binding ; Sensory Receptor Cells/metabolism/pathology
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  • 8
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    Nature Publishing Group (NPG)
    Publication Date: 2015-02-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Feb 12;518(7538):137. doi: 10.1038/518137a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25673375" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes/economics ; Expeditions/economics ; Great Britain ; Humans ; Research/*economics/*standards ; Research Support as Topic/*organization & administration ; *Social Change ; Universities/economics
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  • 9
    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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  • 10
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    Nature Publishing Group (NPG)
    Publication Date: 2015-02-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Feb 5;518(7537):6. doi: 10.1038/518006a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25652960" target="_blank"〉PubMed〈/a〉
    Keywords: Accidents, Traffic/prevention & control ; Algorithms ; Automation/*instrumentation ; *Automobile Driving ; *Automobiles ; Great Britain ; Humans ; Public Opinion ; Safety
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  • 11
    Publication Date: 2015-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pearce-Higgins, James W -- England -- Nature. 2015 Sep 24;525(7570):455. doi: 10.1038/525455b.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉British Trust for Ornithology, Thetford, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26399822" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Birds ; *Conflict of Interest ; Cost-Benefit Analysis ; Data Collection ; Great Britain ; *Hobbies ; Motivation ; *Research Design ; Science/*manpower ; *Volunteers/psychology
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  • 12
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    Nature Publishing Group (NPG)
    Publication Date: 2015-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grafton, Anthony -- England -- Nature. 2015 Dec 3;528(7580):40. doi: 10.1038/528040a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Princeton University in Princeton, New Jersey, USA. He collaborated extensively with Lisa Jardine.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26632582" target="_blank"〉PubMed〈/a〉
    Keywords: Female ; Great Britain ; History, 15th Century ; History, 16th Century ; History, 17th Century ; History, 20th Century ; History, 21st Century ; Humans ; Knowledge ; Literature, Modern/*history ; Male ; Mitochondrial Replacement Therapy ; Science/*history ; Teaching/history ; Writing
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  • 13
    Publication Date: 2015-10-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pearson, Helen -- England -- Nature. 2015 Oct 22;526(7574):492-6. doi: 10.1038/526492a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26490601" target="_blank"〉PubMed〈/a〉
    Keywords: Archives ; Great Britain ; Human Activities/*statistics & numerical data ; Humans ; Laboratories ; Quality of Life/psychology ; *Research/trends ; Self Report ; *Time Management ; Workload/statistics & numerical data
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  • 14
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    Nature Publishing Group (NPG)
    Publication Date: 2015-02-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pearson, Helen -- England -- Nature. 2015 Feb 26;518(7540):463-4. doi: 10.1038/518463a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25719641" target="_blank"〉PubMed〈/a〉
    Keywords: Cohort Studies ; Female ; Great Britain ; *Health Surveys/trends ; Humans ; Infant, Newborn ; *Patient Selection ; Pregnancy ; Research Design ; United States
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  • 15
    Publication Date: 2015-02-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Van Noorden, Richard -- England -- Nature. 2015 Feb 12;518(7538):150-1. doi: 10.1038/518150a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25673393" target="_blank"〉PubMed〈/a〉
    Keywords: *Evaluation Studies as Topic ; Federal Government ; Great Britain ; Research/*economics/*statistics & numerical data ; Research Support as Topic/*organization & administration ; Social Change ; Universities/economics
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  • 16
    Publication Date: 2015-02-18
    Description: The BCR-ABL1 fusion gene is a driver oncogene in chronic myeloid leukaemia and 30-50% of cases of adult acute lymphoblastic leukaemia. Introduction of ABL1 kinase inhibitors (for example, imatinib) has markedly improved patient survival, but acquired drug resistance remains a challenge. Point mutations in the ABL1 kinase domain weaken inhibitor binding and represent the most common clinical resistance mechanism. The BCR-ABL1 kinase domain gatekeeper mutation Thr315Ile (T315I) confers resistance to all approved ABL1 inhibitors except ponatinib, which has toxicity limitations. Here we combine comprehensive drug sensitivity and resistance profiling of patient cells ex vivo with structural analysis to establish the VEGFR tyrosine kinase inhibitor axitinib as a selective and effective inhibitor for T315I-mutant BCR-ABL1-driven leukaemia. Axitinib potently inhibited BCR-ABL1(T315I), at both biochemical and cellular levels, by binding to the active form of ABL1(T315I) in a mutation-selective binding mode. These findings suggest that the T315I mutation shifts the conformational equilibrium of the kinase in favour of an active (DFG-in) A-loop conformation, which has more optimal binding interactions with axitinib. Treatment of a T315I chronic myeloid leukaemia patient with axitinib resulted in a rapid reduction of T315I-positive cells from bone marrow. Taken together, our findings demonstrate an unexpected opportunity to repurpose axitinib, an anti-angiogenic drug approved for renal cancer, as an inhibitor for ABL1 gatekeeper mutant drug-resistant leukaemia patients. This study shows that wild-type proteins do not always sample the conformations available to disease-relevant mutant proteins and that comprehensive drug testing of patient-derived cells can identify unpredictable, clinically significant drug-repositioning opportunities.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pemovska, Tea -- Johnson, Eric -- Kontro, Mika -- Repasky, Gretchen A -- Chen, Jeffrey -- Wells, Peter -- Cronin, Ciaran N -- McTigue, Michele -- Kallioniemi, Olli -- Porkka, Kimmo -- Murray, Brion W -- Wennerberg, Krister -- England -- Nature. 2015 Mar 5;519(7541):102-5. doi: 10.1038/nature14119. Epub 2015 Feb 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Molecular Medicine Finland (FIMM), University of Helsinki, 00290 Helsinki, Finland. ; La Jolla Laboratories, Pfizer Worldwide Research &Development, San Diego, California 92121, USA. ; Hematology Research Unit Helsinki, University of Helsinki, and Helsinki University Hospital Comprehensive Cancer Center, Department of Hematology, 00290 Helsinki, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25686603" target="_blank"〉PubMed〈/a〉
    Keywords: Angiogenesis Inhibitors/chemistry/pharmacology/therapeutic use ; Cell Line ; Cell Proliferation/drug effects ; Crystallization ; Crystallography, X-Ray ; Drug Repositioning ; Drug Resistance, Neoplasm/genetics ; Drug Screening Assays, Antitumor ; Fusion Proteins, bcr-abl/*antagonists & inhibitors/*chemistry/genetics/metabolism ; Humans ; Imidazoles/*chemistry/*pharmacology/therapeutic use ; Indazoles/*chemistry/*pharmacology/therapeutic use ; Kidney Neoplasms/drug therapy ; Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy/genetics/metabolism ; Models, Molecular ; Molecular Conformation ; Phosphorylation/drug effects ; Protein Binding ; Protein Kinase Inhibitors/chemistry/pharmacology/therapeutic use ; Proto-Oncogene Proteins c-abl/antagonists & ; inhibitors/chemistry/genetics/metabolism ; Vascular Endothelial Growth Factor Receptor-2/antagonists & ; inhibitors/chemistry/metabolism
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  • 17
    Publication Date: 2015-01-13
    Description: Evolutionarily conserved SNARE (soluble N-ethylmaleimide sensitive factor attachment protein receptors) proteins form a complex that drives membrane fusion in eukaryotes. The ATPase NSF (N-ethylmaleimide sensitive factor), together with SNAPs (soluble NSF attachment protein), disassembles the SNARE complex into its protein components, making individual SNAREs available for subsequent rounds of fusion. Here we report structures of ATP- and ADP-bound NSF, and the NSF/SNAP/SNARE (20S) supercomplex determined by single-particle electron cryomicroscopy at near-atomic to sub-nanometre resolution without imposing symmetry. Large, potentially force-generating, conformational differences exist between ATP- and ADP-bound NSF. The 20S supercomplex exhibits broken symmetry, transitioning from six-fold symmetry of the NSF ATPase domains to pseudo four-fold symmetry of the SNARE complex. SNAPs interact with the SNARE complex with an opposite structural twist, suggesting an unwinding mechanism. The interfaces between NSF, SNAPs, and SNAREs exhibit characteristic electrostatic patterns, suggesting how one NSF/SNAP species can act on many different SNARE complexes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4320033/" 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/PMC4320033/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhao, Minglei -- Wu, Shenping -- Zhou, Qiangjun -- Vivona, Sandro -- Cipriano, Daniel J -- Cheng, Yifan -- Brunger, Axel T -- 5-U01AI082051-05/AI/NIAID NIH HHS/ -- P50 GM082250/GM/NIGMS NIH HHS/ -- P50GM082250/GM/NIGMS NIH HHS/ -- R01 GM082893/GM/NIGMS NIH HHS/ -- R01 GM098672/GM/NIGMS NIH HHS/ -- R01GM082893/GM/NIGMS NIH HHS/ -- R01GM098672/GM/NIGMS NIH HHS/ -- R37 MH063105/MH/NIMH NIH HHS/ -- R37MH63105/MH/NIMH NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Feb 5;518(7537):61-7. doi: 10.1038/nature14148. Epub 2015 Jan 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Physiology, Howard Hughes Medical Institute, Stanford University, Stanford, California 94305, USA. ; Keck Advanced Microscopy Laboratory, Department of Biochemistry and Biophysics, University of California, San Francisco, California 94158, USA. ; 1] Department of Molecular and Cellular Physiology, Howard Hughes Medical Institute, Stanford University, Stanford, California 94305, USA [2] Department of Neurology and Neurological Sciences, Department of Structural Biology, Department of Photon Science, Stanford University, Stanford, California 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25581794" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Diphosphate/metabolism ; Adenosine Triphosphate/metabolism ; Animals ; Cricetulus ; Cryoelectron Microscopy ; Models, Molecular ; Multiprotein Complexes/*chemistry/*metabolism/ultrastructure ; N-Ethylmaleimide-Sensitive Proteins/chemistry/metabolism/ultrastructure ; Protein Binding ; Protein Structure, Tertiary ; Rats ; SNARE Proteins/*chemistry/*metabolism/ultrastructure ; Soluble N-Ethylmaleimide-Sensitive Factor Attachment ; Proteins/chemistry/metabolism/ultrastructure
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  • 18
    Publication Date: 2015-02-18
    Description: Autophagy, an important catabolic pathway implicated in a broad spectrum of human diseases, begins by forming double membrane autophagosomes that engulf cytosolic cargo and ends by fusing autophagosomes with lysosomes for degradation. Membrane fusion activity is required for early biogenesis of autophagosomes and late degradation in lysosomes. However, the key regulatory mechanisms of autophagic membrane tethering and fusion remain largely unknown. Here we report that ATG14 (also known as beclin-1-associated autophagy-related key regulator (Barkor) or ATG14L), an essential autophagy-specific regulator of the class III phosphatidylinositol 3-kinase complex, promotes membrane tethering of protein-free liposomes, and enhances hemifusion and full fusion of proteoliposomes reconstituted with the target (t)-SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptors) syntaxin 17 (STX17) and SNAP29, and the vesicle (v)-SNARE VAMP8 (vesicle-associated membrane protein 8). ATG14 binds to the SNARE core domain of STX17 through its coiled-coil domain, and stabilizes the STX17-SNAP29 binary t-SNARE complex on autophagosomes. The STX17 binding, membrane tethering and fusion-enhancing activities of ATG14 require its homo-oligomerization by cysteine repeats. In ATG14 homo-oligomerization-defective cells, autophagosomes still efficiently form but their fusion with endolysosomes is blocked. Recombinant ATG14 homo-oligomerization mutants also completely lose their ability to promote membrane tethering and to enhance SNARE-mediated fusion in vitro. Taken together, our data suggest an autophagy-specific membrane fusion mechanism in which oligomeric ATG14 directly binds to STX17-SNAP29 binary t-SNARE complex on autophagosomes and primes it for VAMP8 interaction to promote autophagosome-endolysosome fusion.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4442024/" 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/PMC4442024/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Diao, Jiajie -- Liu, Rong -- Rong, Yueguang -- Zhao, Minglei -- Zhang, Jing -- Lai, Ying -- Zhou, Qiangjun -- Wilz, Livia M -- Li, Jianxu -- Vivona, Sandro -- Pfuetzner, Richard A -- Brunger, Axel T -- Zhong, Qing -- 5P30CA142543/CA/NCI NIH HHS/ -- P41 GM103403/GM/NIGMS NIH HHS/ -- R01 CA133228/CA/NCI NIH HHS/ -- R01 R37-MH63105/MH/NIMH NIH HHS/ -- R37 MH063105/MH/NIMH NIH HHS/ -- T32 GM007232/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Apr 23;520(7548):563-6. doi: 10.1038/nature14147. Epub 2015 Feb 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Molecular and Cellular Physiology, Stanford University, Stanford, California 94305, USA [2] Department of Structural Biology, Stanford University, Stanford, California 94305, USA [3] Department of Photon Science, Stanford University, Stanford, California 94305, USA [4] Department of Neurology and Neurological Sciences, Stanford University, Stanford, California 94305, USA [5] Howard Hughes Medical Institute, Stanford University, Stanford, California 94305, USA. ; 1] Center for Autophagy Research, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA [2] Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA [3] College of Food Science &Nutritional Engineering, China Agricultural University, Beijing 100083, China. ; 1] Center for Autophagy Research, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA [2] Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA. ; Division of Biochemistry, Biophysics and Structural Biology, Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, California 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25686604" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Vesicular Transport/*chemistry/*metabolism ; *Autophagy ; Endosomes/*metabolism ; HEK293 Cells ; HeLa Cells ; Humans ; Lysosomes/*metabolism ; *Membrane Fusion ; Phagosomes/chemistry/*metabolism ; Protein Binding ; Protein Multimerization ; Protein Structure, Tertiary ; Qa-SNARE Proteins/metabolism ; Qb-SNARE Proteins/metabolism ; Qc-SNARE Proteins/metabolism ; R-SNARE Proteins/metabolism ; SNARE Proteins/chemistry/metabolism
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  • 19
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    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2015-04-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Grayson, Michelle -- England -- Nature. 2015 Apr 30;520(7549):S10-2. doi: 10.1038/520S10a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25924192" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes/standards ; China ; Commerce/economics ; Evaluation Studies as Topic ; Great Britain ; Humans ; Research/economics/manpower/*standards/trends ; Research Personnel/standards ; Social Change
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  • 20
    Publication Date: 2015-09-04
    Description: TP53 (which encodes p53 protein) is the most frequently mutated gene among all human cancers. Prevalent p53 missense mutations abrogate its tumour suppressive function and lead to a 'gain-of-function' (GOF) that promotes cancer. Here we show that p53 GOF mutants bind to and upregulate chromatin regulatory genes, including the methyltransferases MLL1 (also known as KMT2A), MLL2 (also known as KMT2D), and acetyltransferase MOZ (also known as KAT6A or MYST3), resulting in genome-wide increases of histone methylation and acetylation. Analysis of The Cancer Genome Atlas shows specific upregulation of MLL1, MLL2, and MOZ in p53 GOF patient-derived tumours, but not in wild-type p53 or p53 null tumours. Cancer cell proliferation is markedly lowered by genetic knockdown of MLL1 or by pharmacological inhibition of the MLL1 methyltransferase complex. Our study reveals a novel chromatin mechanism underlying the progression of tumours with GOF p53, and suggests new possibilities for designing combinatorial chromatin-based therapies for treating individual cancers driven by prevalent GOF p53 mutations.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4568559/" 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/PMC4568559/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhu, Jiajun -- Sammons, Morgan A -- Donahue, Greg -- Dou, Zhixun -- Vedadi, Masoud -- Getlik, Matthaus -- Barsyte-Lovejoy, Dalia -- Al-awar, Rima -- Katona, Bryson W -- Shilatifard, Ali -- Huang, Jing -- Hua, Xianxin -- Arrowsmith, Cheryl H -- Berger, Shelley L -- 092809/Z/10/Z/Wellcome Trust/United Kingdom -- P30 ES013508/ES/NIEHS NIH HHS/ -- R01 CA078831/CA/NCI NIH HHS/ -- R01 GM069905/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Sep 10;525(7568):206-11. doi: 10.1038/nature15251. Epub 2015 Sep 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Epigenetics Program, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Biomedical Graduate Studies, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Structural Genomics Consortium, University of Toronto, Toronto, Ontario M5G 1L7, Canada. ; Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; Drug Discovery Program, Ontario Institute for Cancer Research, Toronto, Ontario M5G 0A3, Canada. ; Abramson Family Cancer Research Institute, Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, 320 E. Superior Street, Chicago, Illinois 60611, USA. ; Cancer and Stem Cell Epigenetics, Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, USA. ; Princess Margaret Cancer Centre, and Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2C4, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26331536" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Cell Line, Tumor ; Cell Proliferation/genetics ; Chromatin/chemistry/*genetics/*metabolism ; Female ; Genes, Tumor Suppressor ; Genome, Human/genetics ; Histone Acetyltransferases/metabolism ; Histone-Lysine N-Methyltransferase/metabolism ; Histones/chemistry/metabolism ; Humans ; Male ; Mice ; Mutant Proteins/genetics/metabolism ; Mutation/*genetics ; Myeloid-Lymphoid Leukemia Protein/metabolism ; Neoplasms/*genetics/metabolism/*pathology ; Phenotype ; Protein Binding ; Protein Processing, Post-Translational ; Tumor Suppressor Protein p53/*genetics/*metabolism
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  • 21
    Publication Date: 2015-12-18
    Description: Eukaryotic transcription factors (TFs) are key determinants of gene activity, yet they bind only a fraction of their corresponding DNA sequence motifs in any given cell type. Chromatin has the potential to restrict accessibility of binding sites; however, in which context chromatin states are instructive for TF binding remains mainly unknown. To explore the contribution of DNA methylation to constrained TF binding, we mapped DNase-I-hypersensitive sites in murine stem cells in the presence and absence of DNA methylation. Methylation-restricted sites are enriched for TF motifs containing CpGs, especially for those of NRF1. In fact, the TF NRF1 occupies several thousand additional sites in the unmethylated genome, resulting in increased transcription. Restoring de novo methyltransferase activity initiates remethylation at these sites and outcompetes NRF1 binding. This suggests that binding of DNA-methylation-sensitive TFs relies on additional determinants to induce local hypomethylation. In support of this model, removal of neighbouring motifs in cis or of a TF in trans causes local hypermethylation and subsequent loss of NRF1 binding. This competition between DNA methylation and TFs in vivo reveals a case of cooperativity between TFs that acts indirectly via DNA methylation. Methylation removal by methylation-insensitive factors enables occupancy of methylation-sensitive factors, a principle that rationalizes hypomethylation of regulatory regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Domcke, Silvia -- Bardet, Anais Flore -- Adrian Ginno, Paul -- Hartl, Dominik -- Burger, Lukas -- Schubeler, Dirk -- England -- Nature. 2015 Dec 24;528(7583):575-9. doi: 10.1038/nature16462. Epub 2015 Dec 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH 4058 Basel, Switzerland. ; University of Basel, Faculty of Sciences, Petersplatz 1, CH 4003 Basel, Switzerland. ; Swiss Institute of Bioinformatics, Maulbeerstrasse 66, CH 4058 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26675734" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Binding, Competitive ; Cells, Cultured ; Chromatin/chemistry/genetics/*metabolism ; *DNA Methylation ; Deoxyribonuclease I/metabolism ; Genome/genetics ; Humans ; Mice ; Mouse Embryonic Stem Cells/metabolism ; Nuclear Respiratory Factor 1/*metabolism ; Protein Binding ; Transcription Factors/*metabolism
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  • 22
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    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2015-08-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marx, Vivien -- England -- Nature. 2015 Aug 27;524(7566):503-5. doi: 10.1038/524503a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Nature and Nature Methods.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26310768" target="_blank"〉PubMed〈/a〉
    Keywords: DNA Mutational Analysis ; Databases, Factual ; Genetic Predisposition to Disease/*genetics ; Genetic Testing/*methods/trends ; Genetic Variation/genetics ; Genetics, Medical/*methods/trends ; Genetics, Population/methods/trends ; Genome, Human/*genetics ; Genomics/*methods/*trends ; Great Britain ; High-Throughput Nucleotide Sequencing ; Humans ; Internationality ; Molecular Sequence Annotation ; Precision Medicine/methods/trends ; *Software
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  • 23
    Publication Date: 2015-02-25
    Description: Plants and plant pathogens are subject to continuous co-evolutionary pressure for dominance, and the outcomes of these interactions can substantially impact agriculture and food security. In virus-plant interactions, one of the major mechanisms for plant antiviral immunity relies on RNA silencing, which is often suppressed by co-evolving virus suppressors, thus enhancing viral pathogenicity in susceptible hosts. In addition, plants use the nucleotide-binding and leucine-rich repeat (NB-LRR) domain-containing resistance proteins, which recognize viral effectors to activate effector-triggered immunity in a defence mechanism similar to that employed in non-viral infections. Unlike most eukaryotic organisms, plants are not known to activate mechanisms of host global translation suppression to fight viruses. Here we demonstrate in Arabidopsis that the constitutive activation of NIK1, a leucine-rich repeat receptor-like kinase (LRR-RLK) identified as a virulence target of the begomovirus nuclear shuttle protein (NSP), leads to global translation suppression and translocation of the downstream component RPL10 to the nucleus, where it interacts with a newly identified MYB-like protein, L10-INTERACTING MYB DOMAIN-CONTAINING PROTEIN (LIMYB), to downregulate translational machinery genes fully. LIMYB overexpression represses ribosomal protein genes at the transcriptional level, resulting in protein synthesis inhibition, decreased viral messenger RNA association with polysome fractions and enhanced tolerance to begomovirus. By contrast, the loss of LIMYB function releases the repression of translation-related genes and increases susceptibility to virus infection. Therefore, LIMYB links immune receptor LRR-RLK activation to global translation suppression as an antiviral immunity strategy in plants.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4779052/" 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/PMC4779052/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zorzatto, Cristiane -- Machado, Joao Paulo B -- Lopes, Kenia V G -- Nascimento, Kelly J T -- Pereira, Welison A -- Brustolini, Otavio J B -- Reis, Pedro A B -- Calil, Iara P -- Deguchi, Michihito -- Sachetto-Martins, Gilberto -- Gouveia, Bianca C -- Loriato, Virgilio A P -- Silva, Marcos A C -- Silva, Fabyano F -- Santos, Anesia A -- Chory, Joanne -- Fontes, Elizabeth P B -- 5R01-GM94428/GM/NIGMS NIH HHS/ -- R01 GM094428/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Apr 30;520(7549):679-82. doi: 10.1038/nature14171. Epub 2015 Feb 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Departamento de Bioquimica e Biologia Molecular, National Institute of Science and Technology in Plant-Pest Interactions, Bioagro, Universidade Federal de Vicosa, 36570.000 Vicosa, Minas Gerais, Brazil [2] National Institute of Science and Technology in Plant-Pest Interactions, Bioagro, Universidade Federal de Vicosa, 36570.000 Vicosa, Minas Gerais, Brazil. ; 1] National Institute of Science and Technology in Plant-Pest Interactions, Bioagro, Universidade Federal de Vicosa, 36570.000 Vicosa, Minas Gerais, Brazil [2] Departamento de Genetica, Universidade Federal do Rio de Janeiro, 21944.970 Rio de Janeiro, Brazil. ; National Institute of Science and Technology in Plant-Pest Interactions, Bioagro, Universidade Federal de Vicosa, 36570.000 Vicosa, Minas Gerais, Brazil. ; Departamento de Zootecnia, Universidade Federal de Vicosa, 36570.000 Vicosa, Minas Gerais, Brazil. ; 1] National Institute of Science and Technology in Plant-Pest Interactions, Bioagro, Universidade Federal de Vicosa, 36570.000 Vicosa, Minas Gerais, Brazil [2] Howard Hughes Medical Institute and Plant Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, California 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25707794" target="_blank"〉PubMed〈/a〉
    Keywords: Active Transport, Cell Nucleus ; Arabidopsis/*immunology/*virology ; Arabidopsis Proteins/*metabolism ; Begomovirus/*immunology ; Cell Nucleus/metabolism ; Down-Regulation ; Gene Expression Regulation, Plant ; Immune Tolerance ; *Immunity, Innate ; *Plant Immunity ; Protein Binding ; Protein Biosynthesis/genetics/*immunology ; Protein-Serine-Threonine Kinases/*metabolism ; Ribosomal Proteins/metabolism ; Transcription Factors/metabolism
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  • 24
    Publication Date: 2015-11-03
    Description: Macroautophagy (hereafter referred to as autophagy) is a catabolic membrane trafficking process that degrades a variety of cellular constituents and is associated with human diseases. Although extensive studies have focused on autophagic turnover of cytoplasmic materials, little is known about the role of autophagy in degrading nuclear components. Here we report that the autophagy machinery mediates degradation of nuclear lamina components in mammals. The autophagy protein LC3/Atg8, which is involved in autophagy membrane trafficking and substrate delivery, is present in the nucleus and directly interacts with the nuclear lamina protein lamin B1, and binds to lamin-associated domains on chromatin. This LC3-lamin B1 interaction does not downregulate lamin B1 during starvation, but mediates its degradation upon oncogenic insults, such as by activated RAS. Lamin B1 degradation is achieved by nucleus-to-cytoplasm transport that delivers lamin B1 to the lysosome. Inhibiting autophagy or the LC3-lamin B1 interaction prevents activated RAS-induced lamin B1 loss and attenuates oncogene-induced senescence in primary human cells. Our study suggests that this new function of autophagy acts as a guarding mechanism protecting cells from tumorigenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dou, Zhixun -- Xu, Caiyue -- Donahue, Greg -- Shimi, Takeshi -- Pan, Ji-An -- Zhu, Jiajun -- Ivanov, Andrejs -- Capell, Brian C -- Drake, Adam M -- Shah, Parisha P -- Catanzaro, Joseph M -- Ricketts, M Daniel -- Lamark, Trond -- Adam, Stephen A -- Marmorstein, Ronen -- Zong, Wei-Xing -- Johansen, Terje -- Goldman, Robert D -- Adams, Peter D -- Berger, Shelley L -- P01AG031862/AG/NIA NIH HHS/ -- R01 CA078831/CA/NCI NIH HHS/ -- R01 GM106023/GM/NIGMS NIH HHS/ -- England -- Nature. 2015 Nov 5;527(7576):105-9. doi: 10.1038/nature15548. Epub 2015 Oct 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Epigenetics Program, Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Department of Cell and Molecular Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA. ; Department of Molecular Genetics and Microbiology, Stony Brook University, Stony Brook, New York 11794, USA. ; Institute of Cancer Sciences, University of Glasgow and Beatson Institute for Cancer Research, Glasgow G61 1BD, UK. ; Department of Biochemistry &Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Molecular Cancer Research Group, Institute of Medical Biology, University of Tromso - The Arctic University of Norway, 9037 Tromso, Norway. ; Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ; Abramson Family Cancer Research 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/26524528" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/metabolism ; Animals ; *Autophagy ; Cell Aging ; Cell Transformation, Neoplastic ; Cells, Cultured ; Chromatin/chemistry/metabolism ; Cytoplasm/metabolism ; Fibroblasts ; HEK293 Cells ; Humans ; Lamin Type B/genetics/metabolism ; Lysosomes/metabolism ; Mice ; Microfilament Proteins/metabolism ; Microtubule-Associated Proteins/metabolism ; Nuclear Lamina/*metabolism ; Oncogene Protein p21(ras)/metabolism ; Protein Binding ; Proteolysis
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  • 25
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    Nature Publishing Group (NPG)
    Publication Date: 2015-12-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doudna, Jennifer -- England -- Nature. 2015 Dec 3;528(7580):S6. doi: 10.1038/528S6a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of California, Berkeley.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26630598" target="_blank"〉PubMed〈/a〉
    Keywords: *CRISPR-Cas Systems ; China ; Congresses as Topic ; Embryo Research/*ethics/*legislation & jurisprudence ; Genetic Engineering/*ethics/*legislation & jurisprudence/standards ; *Genome ; Germ-Line Mutation/*ethics ; Great Britain ; Humans ; Safety/legislation & jurisprudence/standards ; United States
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  • 26
    Publication Date: 2015-03-25
    Description: Cell migration is a stepwise process that coordinates multiple molecular machineries. Using in vitro angiogenesis screens with short interfering RNA and chemical inhibitors, we define here a MAP4K4-moesin-talin-beta1-integrin molecular pathway that promotes efficient plasma membrane retraction during endothelial cell migration. Loss of MAP4K4 decreased membrane dynamics, slowed endothelial cell migration, and impaired angiogenesis in vitro and in vivo. In migrating endothelial cells, MAP4K4 phosphorylates moesin in retracting membranes at sites of focal adhesion disassembly. Epistasis analyses indicated that moesin functions downstream of MAP4K4 to inactivate integrin by competing with talin for binding to beta1-integrin intracellular domain. Consequently, loss of moesin (encoded by the MSN gene) or MAP4K4 reduced adhesion disassembly rate in endothelial cells. Additionally, alpha5beta1-integrin blockade reversed the membrane retraction defects associated with loss of Map4k4 in vitro and in vivo. Our study uncovers a novel aspect of endothelial cell migration. Finally, loss of MAP4K4 function suppressed pathological angiogenesis in disease models, identifying MAP4K4 as a potential therapeutic target.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vitorino, Philip -- Yeung, Stacey -- Crow, Ailey -- Bakke, Jesse -- Smyczek, Tanya -- West, Kristina -- McNamara, Erin -- Eastham-Anderson, Jeffrey -- Gould, Stephen -- Harris, Seth F -- Ndubaku, Chudi -- Ye, Weilan -- England -- Nature. 2015 Mar 26;519(7544):425-30. doi: 10.1038/nature14323. Epub 2015 Mar 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biology Department, Genentech, Inc., South San Francisco, California 94080, USA. ; Chemical Biology and Therapeutics Department, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Translational Oncology Department, Genentech, Inc., South San Francisco, California 94080, USA. ; Pathology Department, Genentech, Inc., South San Francisco, California 94080, USA. ; Structural Biology Department, Genentech, Inc., South San Francisco, California 94080, USA. ; Discovery Chemistry Department, Genentech, Inc., South San Francisco, California 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25799996" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Antigens, CD29/chemistry/drug effects/metabolism ; Cell Membrane/drug effects/metabolism ; *Cell Movement ; Cell Shape/drug effects ; Endothelial Cells/*cytology/drug effects/*metabolism ; Epistasis, Genetic ; Focal Adhesions/metabolism ; Humans ; Integrin alpha1/drug effects/metabolism ; Integrins/drug effects/*metabolism ; Intracellular Signaling Peptides and Proteins/antagonists & ; inhibitors/deficiency/genetics/*metabolism ; Male ; Mice ; Microfilament Proteins/deficiency/genetics/metabolism ; Neovascularization, Pathologic ; Phosphorylation ; Protein Binding ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/antagonists & ; inhibitors/deficiency/genetics/*metabolism ; Talin/chemistry/metabolism
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  • 27
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    Nature Publishing Group (NPG)
    Publication Date: 2015-09-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Draaisma, Douwe -- England -- Nature. 2015 Sep 10;525(7568):188. doi: 10.1038/525188a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Groningen in the Netherlands. He interviewed Oliver Sacks in 2005 for his book The Nostalgia Factory and stayed in contact with him.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26331535" target="_blank"〉PubMed〈/a〉
    Keywords: Autobiography as Topic ; Great Britain ; History, 20th Century ; History, 21st Century ; Humans ; Literature, Modern/history ; Narration ; Neurology/*history ; Psychology/history ; United States
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  • 28
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    Nature Publishing Group (NPG)
    Publication Date: 2015-02-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Callaway, Ewen -- England -- Nature. 2015 Feb 12;518(7538):145-6. doi: 10.1038/518145a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25673389" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Clinical Trials as Topic/legislation & jurisprudence ; Embryo Research/ethics/*legislation & jurisprudence ; Female ; Fertilization in Vitro/ethics/*legislation & jurisprudence/*methods ; Great Britain ; Humans ; Male ; United States ; United States Food and Drug Administration/legislation & jurisprudence
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  • 29
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    Nature Publishing Group (NPG)
    Publication Date: 2015-04-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Apr 9;520(7546):131. doi: 10.1038/520131a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25855418" target="_blank"〉PubMed〈/a〉
    Keywords: Access to Information/*legislation & jurisprudence ; Great Britain ; Licensure ; Publishing/economics/*legislation & jurisprudence ; *Research/economics
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  • 30
    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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  • 31
    Publication Date: 2015-02-25
    Description: Clustered regularly interspaced short palindromic repeat (CRISPR) loci and their associated (Cas) proteins provide adaptive immunity against viral infection in prokaryotes. Upon infection, short phage sequences known as spacers integrate between CRISPR repeats and are transcribed into small RNA molecules that guide the Cas9 nuclease to the viral targets (protospacers). Streptococcus pyogenes Cas9 cleavage of the viral genome requires the presence of a 5'-NGG-3' protospacer adjacent motif (PAM) sequence immediately downstream of the viral target. It is not known whether and how viral sequences flanked by the correct PAM are chosen as new spacers. Here we show that Cas9 selects functional spacers by recognizing their PAM during spacer acquisition. The replacement of cas9 with alleles that lack the PAM recognition motif or recognize an NGGNG PAM eliminated or changed PAM specificity during spacer acquisition, respectively. Cas9 associates with other proteins of the acquisition machinery (Cas1, Cas2 and Csn2), presumably to provide PAM-specificity to this process. These results establish a new function for Cas9 in the genesis of prokaryotic immunological memory.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4385744/" 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/PMC4385744/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heler, Robert -- Samai, Poulami -- Modell, Joshua W -- Weiner, Catherine -- Goldberg, Gregory W -- Bikard, David -- Marraffini, Luciano A -- 1DP2AI104556-01/AI/NIAID NIH HHS/ -- DP2 AI104556/AI/NIAID NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Mar 12;519(7542):199-202. doi: 10.1038/nature14245. Epub 2015 Feb 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Bacteriology, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA. ; 1] Laboratory of Bacteriology, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA [2] Synthetic Biology Group, Institut Pasteur, 28 Rue du Dr. Roux, 75015 Paris, France.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25707807" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; CRISPR-Associated Proteins/*metabolism ; *CRISPR-Cas Systems/immunology ; Clustered Regularly Interspaced Short Palindromic Repeats/*genetics/immunology ; DNA, Viral/*genetics/immunology/metabolism ; Molecular Sequence Data ; Nucleotide Motifs ; Protein Binding ; Protein Structure, Tertiary ; Staphylococcus aureus ; Streptococcus pyogenes/*enzymology/*genetics/immunology/virology ; Substrate Specificity
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  • 32
    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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  • 33
    Publication Date: 2015-12-10
    Description: Inactivation of the TNFAIP3 gene, encoding the A20 protein, is associated with critical inflammatory diseases including multiple sclerosis, rheumatoid arthritis and Crohn's disease. However, the role of A20 in attenuating inflammatory signalling is unclear owing to paradoxical in vitro and in vivo findings. Here we utilize genetically engineered mice bearing mutations in the A20 ovarian tumour (OTU)-type deubiquitinase domain or in the zinc finger-4 (ZnF4) ubiquitin-binding motif to investigate these discrepancies. We find that phosphorylation of A20 promotes cleavage of Lys63-linked polyubiquitin chains by the OTU domain and enhances ZnF4-mediated substrate ubiquitination. Additionally, levels of linear ubiquitination dictate whether A20-deficient cells die in response to tumour necrosis factor. Mechanistically, linear ubiquitin chains preserve the architecture of the TNFR1 signalling complex by blocking A20-mediated disassembly of Lys63-linked polyubiquitin scaffolds. Collectively, our studies reveal molecular mechanisms whereby A20 deubiquitinase activity and ubiquitin binding, linear ubiquitination, and cellular kinases cooperate to regulate inflammation and cell death.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wertz, Ingrid E -- Newton, Kim -- Seshasayee, Dhaya -- Kusam, Saritha -- Lam, Cynthia -- Zhang, Juan -- Popovych, Nataliya -- Helgason, Elizabeth -- Schoeffler, Allyn -- Jeet, Surinder -- Ramamoorthi, Nandhini -- Kategaya, Lorna -- Newman, Robert J -- Horikawa, Keisuke -- Dugger, Debra -- Sandoval, Wendy -- Mukund, Susmith -- Zindal, Anuradha -- Martin, Flavius -- Quan, Clifford -- Tom, Jeffrey -- Fairbrother, Wayne J -- Townsend, Michael -- Warming, Soren -- DeVoss, Jason -- Liu, Jinfeng -- Dueber, Erin -- Caplazi, Patrick -- Lee, Wyne P -- Goodnow, Christopher C -- Balazs, Mercedesz -- Yu, Kebing -- Kolumam, Ganesh -- Dixit, Vishva M -- England -- Nature. 2015 Dec 17;528(7582):370-5. doi: 10.1038/nature16165. Epub 2015 Dec 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Discovery Oncology, Genentech, South San Francisco, California 94080, USA. ; Early Discovery Biochemistry, Genentech, South San Francisco, California 94080, USA. ; Physiological Chemistry, Genentech, South San Francisco, California 94080, USA. ; Immunology, Genentech, South San Francisco, California 94080, USA. ; Molecular Biology, Genentech, South San Francisco, California 94080, USA. ; Department of Cancer Biology and Therapeutics, The John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory 2601, Australia. ; Protein Chemistry, Genentech, South San Francisco, California 94080, USA. ; Structural Biology, Genentech, South San Francisco, California 94080, USA. ; Bioinformatics, Genentech, South San Francisco, California 94080, USA. ; Pathology, Genentech, South San Francisco, California 94080, USA. ; Immunogenomics Laboratory, Immunology Division, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, New South Wales 2010, Sydney, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26649818" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Death ; Cysteine Endopeptidases/chemistry/genetics/*metabolism ; Female ; Inflammation/genetics/*metabolism/pathology ; Intracellular Signaling Peptides and Proteins/chemistry/genetics/*metabolism ; Lysine/metabolism ; Male ; Mice ; Mice, Inbred C57BL ; Mutation ; Phosphorylation ; Polyubiquitin/chemistry/metabolism ; Protein Binding ; Protein Kinases/metabolism ; Signal Transduction ; Tumor Necrosis Factor-alpha/metabolism ; Ubiquitin/*chemistry/*metabolism ; Ubiquitination
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  • 34
    Publication Date: 2015-11-10
    Description: One of the most important questions in biology is how transcription factors (TFs) and cofactors control enhancer function and thus gene expression. Enhancer activation usually requires combinations of several TFs, indicating that TFs function synergistically and combinatorially. However, while TF binding has been extensively studied, little is known about how combinations of TFs and cofactors control enhancer function once they are bound. It is typically unclear which TFs participate in combinatorial enhancer activation, whether different TFs form functionally distinct groups, or if certain TFs might substitute for each other in defined enhancer contexts. Here we assess the potential regulatory contributions of TFs and cofactors to combinatorial enhancer control with enhancer complementation assays. We recruited GAL4-DNA-binding-domain fusions of 812 Drosophila TFs and cofactors to 24 enhancer contexts and measured enhancer activities by 82,752 luciferase assays in S2 cells. Most factors were functional in at least one context, yet their contributions differed between contexts and varied from repression to activation (up to 289-fold) for individual factors. Based on functional similarities across contexts, we define 15 groups of TFs that differ in developmental functions and protein sequence features. Similar TFs can substitute for each other, enabling enhancer re-engineering by exchanging TF motifs, and TF-cofactor pairs cooperate during enhancer control and interact physically. Overall, we show that activators and repressors can have diverse regulatory functions that typically depend on the enhancer context. The systematic functional characterization of TFs and cofactors should further our understanding of combinatorial enhancer control and gene regulation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stampfel, Gerald -- Kazmar, Tomas -- Frank, Olga -- Wienerroither, Sebastian -- Reiter, Franziska -- Stark, Alexander -- England -- Nature. 2015 Dec 3;528(7580):147-51. doi: 10.1038/nature15545. Epub 2015 Nov 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Dr. Bohr-Gasse 7, 1030 Vienna, Austria.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26550828" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Animals ; Cell Line ; DNA/genetics/metabolism ; Down-Regulation/genetics ; Drosophila melanogaster/genetics ; Enhancer Elements, Genetic/*genetics ; *Gene Expression Regulation/genetics ; Genes, Reporter/genetics ; Genetic Complementation Test ; Luciferases/genetics/metabolism ; Protein Binding ; Transcription Factors/*metabolism ; *Transcription, Genetic/genetics ; Up-Regulation/genetics
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  • 35
    Publication Date: 2015-12-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reardon, Sara -- England -- Nature. 2015 Dec 10;528(7581):173. doi: 10.1038/528173a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26659159" target="_blank"〉PubMed〈/a〉
    Keywords: China ; Congresses as Topic ; Embryo Research/*ethics ; Genetic Engineering/*ethics/legislation & jurisprudence/standards/trends ; Great Britain ; Humans ; United States
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  • 36
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    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2015-07-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Jul 16;523(7560):255-6. doi: 10.1038/523255b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26178925" target="_blank"〉PubMed〈/a〉
    Keywords: *Federal Government ; Great Britain ; Gross Domestic Product/statistics & numerical data ; Politics ; Research Support as Topic/*economics/statistics & numerical data ; Science/*economics
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  • 37
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    Nature Publishing Group (NPG)
    Publication Date: 2015-07-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Jul 9;523(7559):127-8. doi: 10.1038/523127b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26156335" target="_blank"〉PubMed〈/a〉
    Keywords: Great Britain ; Peer Review/*trends ; Research/*standards
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  • 38
    Publication Date: 2015-11-03
    Description: DNA methylation is an important epigenetic modification. Ten-eleven translocation (TET) proteins are involved in DNA demethylation through iteratively oxidizing 5-methylcytosine (5mC) into 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC). Here we show that human TET1 and TET2 are more active on 5mC-DNA than 5hmC/5fC-DNA substrates. We determine the crystal structures of TET2-5hmC-DNA and TET2-5fC-DNA complexes at 1.80 A and 1.97 A resolution, respectively. The cytosine portion of 5hmC/5fC is specifically recognized by TET2 in a manner similar to that of 5mC in the TET2-5mC-DNA structure, and the pyrimidine base of 5mC/5hmC/5fC adopts an almost identical conformation within the catalytic cavity. However, the hydroxyl group of 5hmC and carbonyl group of 5fC face towards the opposite direction because the hydroxymethyl group of 5hmC and formyl group of 5fC adopt restrained conformations through forming hydrogen bonds with the 1-carboxylate of NOG and N4 exocyclic nitrogen of cytosine, respectively. Biochemical analyses indicate that the substrate preference of TET2 results from the different efficiencies of hydrogen abstraction in TET2-mediated oxidation. The restrained conformation of 5hmC and 5fC within the catalytic cavity may prevent their abstractable hydrogen(s) adopting a favourable orientation for hydrogen abstraction and thus result in low catalytic efficiency. Our studies demonstrate that the substrate preference of TET2 results from the intrinsic value of its substrates at their 5mC derivative groups and suggest that 5hmC is relatively stable and less prone to further oxidation by TET proteins. Therefore, TET proteins are evolutionarily tuned to be less reactive towards 5hmC and facilitate the generation of 5hmC as a potentially stable mark for regulatory functions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hu, Lulu -- Lu, Junyan -- Cheng, Jingdong -- Rao, Qinhui -- Li, Ze -- Hou, Haifeng -- Lou, Zhiyong -- Zhang, Lei -- Li, Wei -- Gong, Wei -- Liu, Mengjie -- Sun, Chang -- Yin, Xiaotong -- Li, Jie -- Tan, Xiangshi -- Wang, Pengcheng -- Wang, Yinsheng -- Fang, Dong -- Cui, Qiang -- Yang, Pengyuan -- He, Chuan -- Jiang, Hualiang -- Luo, Cheng -- Xu, Yanhui -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Nov 5;527(7576):118-22. doi: 10.1038/nature15713. Epub 2015 Oct 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Fudan University Shanghai Cancer Center, Institute of Biomedical Sciences, Shanghai Medical College of Fudan University, Shanghai 200032, China. ; Key Laboratory of Molecular Medicine, Ministry of Education, Department of Systems Biology for Medicine, School of Basic Medical Sciences, Shanghai Medical College of Fudan University, Shanghai 200032, China. ; State Key Laboratory of Genetic Engineering, Collaborative Innovation Center of Genetics and Development, School of Life Sciences, Fudan University, Shanghai 200433, China. ; Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China. ; Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China. ; Laboratory of Structural Biology, Tsinghua University, Beijing 100084, China. ; MOE Laboratory of Protein Science, School of Medicine, Tsinghua University, Beijing 100084, China. ; Department of Chemistry, University of California-Riverside, Riverside, California 92521-0403, USA. ; Theoretical Chemistry Institute, Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA. ; Department of Chemistry and Institute for Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA. ; Howard Hughes Medical Institute, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26524525" target="_blank"〉PubMed〈/a〉
    Keywords: 5-Methylcytosine/metabolism ; Biocatalysis ; Catalytic Domain ; Crystallography, X-Ray ; Cytosine/analogs & derivatives/metabolism ; DNA/*chemistry/*metabolism ; DNA Methylation ; DNA-Binding Proteins/*chemistry/*metabolism ; Humans ; Hydrogen Bonding ; Models, Molecular ; Oxidation-Reduction ; Protein Binding ; Proto-Oncogene Proteins/*chemistry/*metabolism ; Substrate Specificity
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  • 39
    Publication Date: 2015-12-04
    Description: The negative effect of increasing atmospheric nitrogen (N) pollution on grassland biodiversity is now incontrovertible. However, the recent introduction of cleaner technologies in the UK has led to reductions in the emissions of nitrogen oxides, with concomitant decreases in N deposition. The degree to which grassland biodiversity can be expected to 'bounce back' in response to these improvements in air quality is uncertain, with a suggestion that long-term chronic N addition may lead to an alternative low biodiversity state. Here we present evidence from the 160-year-old Park Grass Experiment at Rothamsted Research, UK, that shows a positive response of biodiversity to reducing N addition from either atmospheric pollution or fertilizers. The proportion of legumes, species richness and diversity increased across the experiment between 1991 and 2012 as both wet and dry N deposition declined. Plots that stopped receiving inorganic N fertilizer in 1989 recovered much of the diversity that had been lost, especially if limed. There was no evidence that chronic N addition has resulted in an alternative low biodiversity state on the Park Grass plots, except where there has been extreme acidification, although it is likely that the recovery of plant communities has been facilitated by the twice-yearly mowing and removal of biomass. This may also explain why a comparable response of plant communities to reduced N inputs has yet to be observed in the wider landscape.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Storkey, J -- Macdonald, A J -- Poulton, P R -- Scott, T -- Kohler, I H -- Schnyder, H -- Goulding, K W T -- Crawley, M J -- Biotechnology and Biological Sciences Research Council/United Kingdom -- England -- Nature. 2015 Dec 17;528(7582):401-4. doi: 10.1038/nature16444. Epub 2015 Dec 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK. ; Lehrstuhl fur Grunlandlehre, Technische Universitat Munchen, Alte Akademie 12, 85354 Freising-Weihenstephan, Germany. ; Department of Biological Sciences, Imperial College London, Silwood Park, Ascot, Berkshire SL5 7PY, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26633635" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollution/*adverse effects/analysis ; Atmosphere/chemistry ; *Biodiversity ; Biomass ; *Environmental Restoration and Remediation ; Fabaceae/drug effects/metabolism ; Fertilizers/adverse effects/analysis ; *Grassland ; Great Britain ; Hydrogen-Ion Concentration ; Nitrogen/*adverse effects/analysis ; Parks, Recreational ; Poaceae/*classification/*drug effects/metabolism
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  • 40
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    Nature Publishing Group (NPG)
    Publication Date: 2015-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nelson, Bryn -- England -- Nature. 2015 Apr 30;520(7549):711-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25932490" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes ; Africa, Western/epidemiology ; Biotechnology ; Clinical Trials as Topic ; Drug Industry ; Ebola Vaccines/adverse effects/*supply & distribution ; Great Britain ; Health Education ; Hemorrhagic Fever, Ebola/epidemiology/prevention & control ; Humans ; Internationality ; *Public Health/education/manpower ; Risk Management ; Time Factors ; Trust ; World Health Organization
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  • 41
    Publication Date: 2015-12-18
    Description: T helper 17 (TH17) lymphocytes protect mucosal barriers from infections, but also contribute to multiple chronic inflammatory diseases. Their differentiation is controlled by RORgammat, a ligand-regulated nuclear receptor. Here we identify the RNA helicase DEAD-box protein 5 (DDX5) as a RORgammat partner that coordinates transcription of selective TH17 genes, and is required for TH17-mediated inflammatory pathologies. Surprisingly, the ability of DDX5 to interact with RORgammat and coactivate its targets depends on intrinsic RNA helicase activity and binding of a conserved nuclear long noncoding RNA (lncRNA), Rmrp, which is mutated in patients with cartilage-hair hypoplasia. A targeted Rmrp gene mutation in mice, corresponding to a gene mutation in cartilage-hair hypoplasia patients, altered lncRNA chromatin occupancy, and reduced the DDX5-RORgammat interaction and RORgammat target gene transcription. Elucidation of the link between Rmrp and the DDX5-RORgammat complex reveals a role for RNA helicases and lncRNAs in tissue-specific transcriptional regulation, and provides new opportunities for therapeutic intervention in TH17-dependent diseases.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4762670/" 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/PMC4762670/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, Wendy -- Thomas, Benjamin -- Flynn, Ryan A -- Gavzy, Samuel J -- Wu, Lin -- Kim, Sangwon V -- Hall, Jason A -- Miraldi, Emily R -- Ng, Charles P -- Rigo, Frank W -- Meadows, Sarah -- Montoya, Nina R -- Herrera, Natalia G -- Domingos, Ana I -- Rastinejad, Fraydoon -- Myers, Richard M -- Fuller-Pace, Frances V -- Bonneau, Richard -- Chang, Howard Y -- Acuto, Oreste -- Littman, Dan R -- 1F30CA189514-01/CA/NCI NIH HHS/ -- F30 CA189514/CA/NCI NIH HHS/ -- P50 HG007735/HG/NHGRI NIH HHS/ -- P50-HG007735/HG/NHGRI NIH HHS/ -- R01 AI080885/AI/NIAID NIH HHS/ -- R01 AI121436/AI/NIAID NIH HHS/ -- R01 DK103358/DK/NIDDK NIH HHS/ -- R01 HG004361/HG/NHGRI NIH HHS/ -- R01AI080885/AI/NIAID NIH HHS/ -- R01DK103358/DK/NIDDK NIH HHS/ -- R01HG004361/HG/NHGRI NIH HHS/ -- T32 AI100853/AI/NIAID NIH HHS/ -- T32 CA009161/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Dec 24;528(7583):517-22. doi: 10.1038/nature16193. Epub 2015 Dec 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, New York 10016, USA. ; Sir William Dunn School of Pathology, University of Oxford, Oxford OX1 3RE, UK. ; Center for Personal Dynamic Regulomes, Stanford University, Stanford, California 94305, USA. ; Center for Genomics and Systems Biology, Department of Biology, New York University, New York, New York 10003, USA. ; Courant Institute of Mathematical Sciences, Computer Science Department, New York University, New York, New York 10012, USA. ; Simons Center for Data Analysis, Simons Foundation, New York, New York 10010, USA. ; Isis Pharmaceuticals, Carlsbad, California 92010, USA. ; HudsonAlpha Institute for Biotechnology, Huntsville, Alabama 35806, USA. ; Instituto Gulbenkian de Ciencia, Oeiras 2780-156, Portugal. ; Integrative Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, Florida 32827, USA. ; Division of Cancer Research, University of Dundee, Dundee DD1 9SY, UK. ; Howard Hughes Medical Institute, New York University School of Medicine, New York, New York 10016, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26675721" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromatin/genetics/metabolism ; DEAD-box RNA Helicases/genetics/*metabolism ; Female ; Gene Expression Regulation/genetics ; Hair/abnormalities ; Hirschsprung Disease/genetics ; Humans ; Immunologic Deficiency Syndromes/genetics ; Inflammation/immunology/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Mutation/genetics ; Nuclear Receptor Subfamily 1, Group F, Member 3/metabolism ; Organ Specificity ; Osteochondrodysplasias/congenital/genetics ; Protein Binding ; RNA, Long Noncoding/genetics/*metabolism ; Th17 Cells/*immunology/*metabolism ; Transcription, Genetic/genetics
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  • 42
    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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  • 43
    Publication Date: 2015-06-11
    Description: Gram-negative bacteria inhabit a broad range of ecological niches. For Escherichia coli, this includes river water as well as humans and animals, where it can be both a commensal and a pathogen. Intricate regulatory mechanisms ensure that bacteria have the right complement of beta-barrel outer membrane proteins (OMPs) to enable adaptation to a particular habitat. Yet no mechanism is known for replacing OMPs in the outer membrane, an issue that is further confounded by the lack of an energy source and the high stability and abundance of OMPs. Here we uncover the process underpinning OMP turnover in E. coli and show it to be passive and binary in nature, in which old OMPs are displaced to the poles of growing cells as new OMPs take their place. Using fluorescent colicins as OMP-specific probes, in combination with ensemble and single-molecule fluorescence microscopy in vivo and in vitro, as well as molecular dynamics simulations, we established the mechanism for binary OMP partitioning. OMPs clustered to form approximately 0.5-mum diameter islands, where their diffusion is restricted by promiscuous interactions with other OMPs. OMP islands were distributed throughout the cell and contained the Bam complex, which catalyses the insertion of OMPs in the outer membrane. However, OMP biogenesis occurred as a gradient that was highest at mid-cell but largely absent at cell poles. The cumulative effect is to push old OMP islands towards the poles of growing cells, leading to a binary distribution when cells divide. Hence, the outer membrane of a Gram-negative bacterium is a spatially and temporally organized structure, and this organization lies at the heart of how OMPs are turned over in the membrane.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rassam, Patrice -- Copeland, Nikki A -- Birkholz, Oliver -- Toth, Csaba -- Chavent, Matthieu -- Duncan, Anna L -- Cross, Stephen J -- Housden, Nicholas G -- Kaminska, Renata -- Seger, Urban -- Quinn, Diana M -- Garrod, Tamsin J -- Sansom, Mark S P -- Piehler, Jacob -- Baumann, Christoph G -- Kleanthous, Colin -- BB/G020671/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/L002558/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- WT092970MA/Wellcome Trust/United Kingdom -- England -- Nature. 2015 Jul 16;523(7560):333-6. doi: 10.1038/nature14461. Epub 2015 Jun 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK [2] Department of Biology, University of York, York YO10 5DD, UK. ; Department of Biology, University of York, York YO10 5DD, UK. ; Department of Biology, University of Osnabruck, Barbarastrasse 11, 49076 Osnabruck, Germany. ; Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26061769" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Outer Membrane Proteins/*chemistry/*metabolism ; Cell Polarity ; Diffusion ; Escherichia coli/chemistry/*cytology/genetics/*metabolism ; Escherichia coli Proteins/*chemistry/*metabolism ; Lipid-Linked Proteins/metabolism ; Microscopy, Confocal ; Microscopy, Fluorescence ; Molecular Dynamics Simulation ; Multiprotein Complexes/metabolism ; Protein Binding ; Protein Transport
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  • 44
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    Nature Publishing Group (NPG)
    Publication Date: 2015-09-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Sep 24;525(7570):425-6. doi: 10.1038/525425b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26399789" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bioethical Issues ; CRISPR-Cas Systems ; Female ; Genes, Mitochondrial/genetics ; Great Britain ; Humans ; Male ; Mitochondria/*transplantation ; Mitochondrial Diseases/genetics/pathology/*therapy ; *Practice Guidelines as Topic
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  • 45
    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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  • 46
    Publication Date: 2015-11-26
    Description: Transcription of genes encoding small structured RNAs such as transfer RNAs, spliceosomal U6 small nuclear RNA and ribosomal 5S RNA is carried out by RNA polymerase III (Pol III), the largest yet structurally least characterized eukaryotic RNA polymerase. Here we present the cryo-electron microscopy structures of the Saccharomyces cerevisiae Pol III elongating complex at 3.9 A resolution and the apo Pol III enzyme in two different conformations at 4.6 and 4.7 A resolution, respectively, which allow the building of a 17-subunit atomic model of Pol III. The reconstructions reveal the precise orientation of the C82-C34-C31 heterotrimer in close proximity to the stalk. The C53-C37 heterodimer positions residues involved in transcription termination close to the non-template DNA strand. In the apo Pol III structures, the stalk adopts different orientations coupled with closed and open conformations of the clamp. Our results provide novel insights into Pol III-specific transcription and the adaptation of Pol III towards its small transcriptional targets.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4681132/" 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/PMC4681132/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hoffmann, Niklas A -- Jakobi, Arjen J -- Moreno-Morcillo, Maria -- Glatt, Sebastian -- Kosinski, Jan -- Hagen, Wim J H -- Sachse, Carsten -- Muller, Christoph W -- England -- Nature. 2015 Dec 10;528(7581):231-6. doi: 10.1038/nature16143. Epub 2015 Nov 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉European Molecular Biology Laboratory (EMBL), Structural and Computational Biology Unit, Meyerhofstrasse 1, 69117 Heidelberg, Germany. ; European Molecular Biology Laboratory (EMBL), Hamburg Unit, Notkestrasse 85, 22607 Hamburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26605533" target="_blank"〉PubMed〈/a〉
    Keywords: Cryoelectron Microscopy ; *Models, Molecular ; Protein Binding ; Protein Structure, Tertiary ; RNA Polymerase III/*chemistry ; Saccharomyces cerevisiae/*enzymology ; Saccharomyces cerevisiae Proteins/*chemistry
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  • 47
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    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2015-01-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reardon, Sara -- England -- Nature. 2015 Jan 8;517(7533):132-4. doi: 10.1038/517132a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25567264" target="_blank"〉PubMed〈/a〉
    Keywords: Biomedical Research ; Environmental Exposure/*adverse effects ; Great Britain ; *Gulf War ; Humans ; Institute of Medicine (U.S.) ; Military Personnel/psychology/statistics & numerical data ; Persian Gulf Syndrome/*chemically induced/epidemiology/physiopathology/psychology ; Research Report ; United States/epidemiology ; United States Department of Veterans Affairs ; *Veterans Health/statistics & numerical data
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  • 48
    Publication Date: 2015-06-18
    Description: The anaphase-promoting complex (APC/C) is a multimeric RING E3 ubiquitin ligase that controls chromosome segregation and mitotic exit. Its regulation by coactivator subunits, phosphorylation, the mitotic checkpoint complex and interphase early mitotic inhibitor 1 (Emi1) ensures the correct order and timing of distinct cell-cycle transitions. Here we use cryo-electron microscopy to determine atomic structures of APC/C-coactivator complexes with either Emi1 or a UbcH10-ubiquitin conjugate. These structures define the architecture of all APC/C subunits, the position of the catalytic module and explain how Emi1 mediates inhibition of the two E2s UbcH10 and Ube2S. Definition of Cdh1 interactions with the APC/C indicates how they are antagonized by Cdh1 phosphorylation. The structure of the APC/C with UbcH10-ubiquitin reveals insights into the initiating ubiquitination reaction. Our results provide a quantitative framework for the design of future experiments to investigate APC/C functions in vivo.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4608048/" 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/PMC4608048/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chang, Leifu -- Zhang, Ziguo -- Yang, Jing -- McLaughlin, Stephen H -- Barford, David -- A8022/Cancer Research UK/United Kingdom -- MC_UP_1201/6/Medical Research Council/United Kingdom -- Cancer Research UK/United Kingdom -- England -- Nature. 2015 Jun 25;522(7557):450-4. doi: 10.1038/nature14471. Epub 2015 Jun 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC 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/26083744" target="_blank"〉PubMed〈/a〉
    Keywords: Anaphase-Promoting Complex-Cyclosome/chemistry/*metabolism/*ultrastructure ; Apc1 Subunit, Anaphase-Promoting ; Complex-Cyclosome/chemistry/metabolism/ultrastructure ; Apc10 Subunit, Anaphase-Promoting ; Complex-Cyclosome/chemistry/metabolism/ultrastructure ; Apc11 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry/metabolism ; Apc3 Subunit, Anaphase-Promoting Complex-Cyclosome/chemistry/metabolism ; Apc8 Subunit, Anaphase-Promoting ; Complex-Cyclosome/chemistry/metabolism/ultrastructure ; Cadherins/chemistry/metabolism/ultrastructure ; Catalytic Domain ; Cell Cycle Proteins/chemistry/metabolism/ultrastructure ; Cryoelectron Microscopy ; Cytoskeletal Proteins/chemistry/metabolism ; F-Box Proteins/chemistry/metabolism/ultrastructure ; Humans ; Lysine/metabolism ; Models, Molecular ; Phosphorylation ; Protein Binding ; Protein Subunits/chemistry/metabolism ; Structure-Activity Relationship ; Substrate Specificity ; Ubiquitin/chemistry/metabolism/ultrastructure ; Ubiquitin-Conjugating Enzymes/chemistry/metabolism/ultrastructure ; *Ubiquitination
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  • 49
    Publication Date: 2015-07-15
    Description: The E3 ubiquitin ligase PARKIN (encoded by PARK2) and the protein kinase PINK1 (encoded by PARK6) are mutated in autosomal-recessive juvenile Parkinsonism (AR-JP) and work together in the disposal of damaged mitochondria by mitophagy. PINK1 is stabilized on the outside of depolarized mitochondria and phosphorylates polyubiquitin as well as the PARKIN ubiquitin-like (Ubl) domain. These phosphorylation events lead to PARKIN recruitment to mitochondria, and activation by an unknown allosteric mechanism. Here we present the crystal structure of Pediculus humanus PARKIN in complex with Ser65-phosphorylated ubiquitin (phosphoUb), revealing the molecular basis for PARKIN recruitment and activation. The phosphoUb binding site on PARKIN comprises a conserved phosphate pocket and harbours residues mutated in patients with AR-JP. PhosphoUb binding leads to straightening of a helix in the RING1 domain, and the resulting conformational changes release the Ubl domain from the PARKIN core; this activates PARKIN. Moreover, phosphoUb-mediated Ubl release enhances Ubl phosphorylation by PINK1, leading to conformational changes within the Ubl domain and stabilization of an open, active conformation of PARKIN. We redefine the role of the Ubl domain not only as an inhibitory but also as an activating element that is restrained in inactive PARKIN and released by phosphoUb. Our work opens up new avenues to identify small-molecule PARKIN activators.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wauer, Tobias -- Simicek, Michal -- Schubert, Alexander -- Komander, David -- U105192732/Medical Research Council/United Kingdom -- England -- Nature. 2015 Aug 20;524(7565):370-4. doi: 10.1038/nature14879. Epub 2015 Jul 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉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/26161729" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites/genetics ; Conserved Sequence/genetics ; Crystallography, X-Ray ; Enzyme Activation ; Humans ; Models, Molecular ; Mutation/genetics ; Parkinsonian Disorders/genetics ; Pediculus/*chemistry ; Phosphates/metabolism ; Phosphoproteins/chemistry/metabolism ; Phosphorylation ; Protein Binding ; Protein Kinases/metabolism ; Protein Structure, Tertiary ; Structure-Activity Relationship ; Ubiquitin/*chemistry/*metabolism ; Ubiquitin-Protein Ligases/*chemistry/genetics/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 50
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    Nature Publishing Group (NPG)
    Publication Date: 2015-02-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rastan, Sohaila -- England -- Nature. 2015 Feb 5;518(7537):36. doi: 10.1038/518036a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Radiobiology Unit in Harwell, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25652989" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosomes, Mammalian/genetics ; Female ; Genetics/*history ; Great Britain ; History, 20th Century ; History, 21st Century ; Humans ; Male ; Mice ; RNA, Long Noncoding/genetics ; Terminology as Topic ; X Chromosome Inactivation/genetics
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  • 51
    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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  • 52
    Publication Date: 2015-01-22
    Description: DNA methylation is an epigenetic modification associated with transcriptional repression of promoters and is essential for mammalian development. Establishment of DNA methylation is mediated by the de novo DNA methyltransferases DNMT3A and DNMT3B, whereas DNMT1 ensures maintenance of methylation through replication. Absence of these enzymes is lethal, and somatic mutations in these genes have been associated with several human diseases. How genomic DNA methylation patterns are regulated remains poorly understood, as the mechanisms that guide recruitment and activity of DNMTs in vivo are largely unknown. To gain insights into this matter we determined genomic binding and site-specific activity of the mammalian de novo DNA methyltransferases DNMT3A and DNMT3B. We show that both enzymes localize to methylated, CpG-dense regions in mouse stem cells, yet are excluded from active promoters and enhancers. By specifically measuring sites of de novo methylation, we observe that enzymatic activity reflects binding. De novo methylation increases with CpG density, yet is excluded from nucleosomes. Notably, we observed selective binding of DNMT3B to the bodies of transcribed genes, which leads to their preferential methylation. This targeting to transcribed sequences requires SETD2-mediated methylation of lysine 36 on histone H3 and a functional PWWP domain of DNMT3B. Together these findings reveal how sequence and chromatin cues guide de novo methyltransferase activity to ensure methylome integrity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baubec, Tuncay -- Colombo, Daniele F -- Wirbelauer, Christiane -- Schmidt, Juliane -- Burger, Lukas -- Krebs, Arnaud R -- Akalin, Altuna -- Schubeler, Dirk -- England -- Nature. 2015 Apr 9;520(7546):243-7. doi: 10.1038/nature14176. Epub 2015 Jan 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058 Basel, Switzerland. ; 1] Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058 Basel, Switzerland [2] Swiss Institute of Bioinformatics. Maulbeerstrasse 66, CH-4058 Basel, Switzerland. ; 1] Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058 Basel, Switzerland [2] University of Basel, Faculty of Sciences, Petersplatz 1, CH-4001 Basel, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25607372" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromatin/chemistry/genetics/metabolism ; CpG Islands/genetics ; DNA (Cytosine-5-)-Methyltransferase/chemistry/*metabolism ; DNA Methylation/*genetics ; Embryonic Stem Cells/enzymology/metabolism ; Enhancer Elements, Genetic/genetics ; Epigenesis, Genetic/*genetics ; Genome/*genetics ; Genomics ; Histone-Lysine N-Methyltransferase/deficiency/genetics/metabolism ; Histones/chemistry/metabolism ; Lysine/metabolism ; Mice ; Promoter Regions, Genetic/genetics ; Protein Binding ; Protein Structure, Tertiary ; Protein Transport ; Transcription, Genetic/genetics
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  • 53
    Publication Date: 2015-01-09
    Description: Intracellular pathogens are responsible for much of the world-wide morbidity and mortality due to infectious diseases. To colonize their hosts successfully, pathogens must sense their environment and regulate virulence gene expression appropriately. Accordingly, on entry into mammalian cells, the facultative intracellular bacterial pathogen Listeria monocytogenes remodels its transcriptional program by activating the master virulence regulator PrfA. Here we show that bacterial and host-derived glutathione are required to activate PrfA. In this study a genetic selection led to the identification of a bacterial mutant in glutathione synthase that exhibited reduced virulence gene expression and was attenuated 150-fold in mice. Genome sequencing of suppressor mutants that arose spontaneously in vivo revealed a single nucleotide change in prfA that locks the protein in the active conformation (PrfA*) and completely bypassed the requirement for glutathione during infection. Biochemical and genetic studies support a model in which glutathione-dependent PrfA activation is mediated by allosteric binding of glutathione to PrfA. Whereas glutathione and other low-molecular-weight thiols have important roles in redox homeostasis in all forms of life, here we demonstrate that glutathione represents a critical signalling molecule that activates the virulence of an intracellular pathogen.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4305340/" 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/PMC4305340/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reniere, Michelle L -- Whiteley, Aaron T -- Hamilton, Keri L -- John, Sonya M -- Lauer, Peter -- Brennan, Richard G -- Portnoy, Daniel A -- 1P01AI63302/AI/NIAID NIH HHS/ -- 1R01 AI27655/AI/NIAID NIH HHS/ -- F32AI104247/AI/NIAID NIH HHS/ -- F32GM008487/GM/NIGMS NIH HHS/ -- P01 AI063302/AI/NIAID NIH HHS/ -- R01 AI027655/AI/NIAID NIH HHS/ -- S10RR027303/RR/NCRR NIH HHS/ -- S10RR029668/RR/NCRR NIH HHS/ -- England -- Nature. 2015 Jan 8;517(7533):170-3. doi: 10.1038/nature14029.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA. ; Graduate Group in Infectious Diseases and Immunity, School of Public Health, University of California, Berkeley, California 94720, USA. ; Department of Biochemistry, Duke University School of Medicine, Durham, North Carolina 27710, USA. ; Aduro BioTech, Inc. Berkeley, California 94710, USA. ; 1] Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, USA [2] School of Public Health, University of California, Berkeley, California 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25567281" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation/drug effects ; Bacterial Proteins/metabolism ; DNA/metabolism ; Gene Expression Regulation, Bacterial/drug effects/*genetics ; Glutathione/*metabolism/pharmacology ; Intracellular Space/drug effects/*metabolism/*microbiology ; Listeria monocytogenes/drug effects/*genetics/*pathogenicity ; Macrophages/metabolism ; Mutation/genetics ; Peptide Termination Factors/metabolism ; Protein Binding ; Selection, Genetic/genetics ; Suppression, Genetic/genetics ; Virulence/genetics
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  • 54
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    Nature Publishing Group (NPG)
    Publication Date: 2015-04-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sweeney, David -- Fleming, Nic -- England -- Nature. 2015 Apr 30;520(7549):S21. doi: 10.1038/520S21a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25924195" target="_blank"〉PubMed〈/a〉
    Keywords: China ; Great Britain ; Research/*economics/organization & administration/*standards ; Research Support as Topic/*economics/*organization & administration
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  • 55
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    Nature Publishing Group (NPG)
    Publication Date: 2015-07-15
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilsdon, James -- England -- Nature. 2015 Jul 9;523(7559):129. doi: 10.1038/523129a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Sussex, UK, and chair of the Independent Review of the Use of Metrics in Research Assessment & Management.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26156338" target="_blank"〉PubMed〈/a〉
    Keywords: *Decision Making ; *Evaluation Studies as Topic ; Great Britain ; Peer Review/standards ; Research/economics/*standards/*trends ; Universities/trends
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  • 56
    Publication Date: 2015-09-15
    Description: The contribution of rare and low-frequency variants to human traits is largely unexplored. Here we describe insights from sequencing whole genomes (low read depth, 7x) or exomes (high read depth, 80x) of nearly 10,000 individuals from population-based and disease collections. In extensively phenotyped cohorts we characterize over 24 million novel sequence variants, generate a highly accurate imputation reference panel and identify novel alleles associated with levels of triglycerides (APOB), adiponectin (ADIPOQ) and low-density lipoprotein cholesterol (LDLR and RGAG1) from single-marker and rare variant aggregation tests. We describe population structure and functional annotation of rare and low-frequency variants, use the data to estimate the benefits of sequencing for association studies, and summarize lessons from disease-specific collections. Finally, we make available an extensive resource, including individual-level genetic and phenotypic data and web-based tools to facilitate the exploration of association results.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4773891/" 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/PMC4773891/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉UK10K Consortium -- Walter, Klaudia -- Min, Josine L -- Huang, Jie -- Crooks, Lucy -- Memari, Yasin -- McCarthy, Shane -- Perry, John R B -- Xu, ChangJiang -- Futema, Marta -- Lawson, Daniel -- Iotchkova, Valentina -- Schiffels, Stephan -- Hendricks, Audrey E -- Danecek, Petr -- Li, Rui -- Floyd, James -- Wain, Louise V -- Barroso, Ines -- Humphries, Steve E -- Hurles, Matthew E -- Zeggini, Eleftheria -- Barrett, Jeffrey C -- Plagnol, Vincent -- Richards, J Brent -- Greenwood, Celia M T -- Timpson, Nicholas J -- Durbin, Richard -- Soranzo, Nicole -- 091551/Wellcome Trust/United Kingdom -- 095515/Wellcome Trust/United Kingdom -- 095564/Wellcome Trust/United Kingdom -- 098498/Wellcome Trust/United Kingdom -- 100140/Wellcome Trust/United Kingdom -- 104036/Wellcome Trust/United Kingdom -- CZD/16/6/4/Chief Scientist Office/United Kingdom -- MC_UU_12013/3/Medical Research Council/United Kingdom -- RG/10/13/28570/British Heart Foundation/United Kingdom -- WT091310/Wellcome Trust/United Kingdom -- England -- Nature. 2015 Oct 1;526(7571):82-90. doi: 10.1038/nature14962. Epub 2015 Sep 14.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26367797" target="_blank"〉PubMed〈/a〉
    Keywords: Adiponectin/blood ; Alleles ; Cohort Studies ; Disease/*genetics ; Exome/genetics ; Female ; Genetic Predisposition to Disease/genetics ; Genetic Variation/*genetics ; Genetics, Medical ; Genetics, Population ; Genome, Human/*genetics ; Genome-Wide Association Study ; Genomics ; Great Britain ; *Health ; Humans ; Lipid Metabolism/genetics ; Male ; Molecular Sequence Annotation ; Receptors, LDL/genetics ; Reference Standards ; Sequence Analysis, DNA ; Triglycerides/blood
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  • 57
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    Nature Publishing Group (NPG)
    Publication Date: 2015-06-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Casiraghi, Cinzia -- Lowes, Sara -- Peplow, Mark -- England -- Nature. 2015 Jun 18;522(7556):284. doi: 10.1038/522284a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26085258" target="_blank"〉PubMed〈/a〉
    Keywords: *Cooperative Behavior ; European Union ; *Graphite/chemistry ; Great Britain ; *Music ; Nanotubes, Carbon ; *Science ; Women's Rights
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  • 58
    Publication Date: 2015-06-06
    Description: Circadian and metabolic physiology are intricately intertwined, as illustrated by Rev-erbalpha, a transcription factor (TF) that functions both as a core repressive component of the cell-autonomous clock and as a regulator of metabolic genes. Here, we show that Rev-erbalpha modulates the clock and metabolism by different genomic mechanisms. Clock control requires Rev-erbalpha to bind directly to the genome at its cognate sites, where it competes with activating ROR TFs. By contrast, Rev-erbalpha regulates metabolic genes primarily by recruiting the HDAC3 co-repressor to sites to which it is tethered by cell type-specific transcription factors. Thus, direct competition between Rev-erbalpha and ROR TFs provides a universal mechanism for self-sustained control of the molecular clock across all tissues, whereas Rev-erbalpha uses lineage-determining factors to convey a tissue-specific epigenomic rhythm that regulates metabolism tailored to the specific need of that tissue.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4613749/" 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/PMC4613749/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Yuxiang -- Fang, Bin -- Emmett, Matthew J -- Damle, Manashree -- Sun, Zheng -- Feng, Dan -- Armour, Sean M -- Remsberg, Jarrett R -- Jager, Jennifer -- Soccio, Raymond E -- Steger, David J -- Lazar, Mitchell A -- F30 DK104513/DK/NIDDK NIH HHS/ -- F32 DK102284/DK/NIDDK NIH HHS/ -- K08 DK094968/DK/NIDDK NIH HHS/ -- P30 DK019525/DK/NIDDK NIH HHS/ -- P30 DK050306/DK/NIDDK NIH HHS/ -- P30 DK19525/DK/NIDDK NIH HHS/ -- R00 DK099443/DK/NIDDK NIH HHS/ -- R01 DK045586/DK/NIDDK NIH HHS/ -- R01 DK098542/DK/NIDDK NIH HHS/ -- R01 DK45586/DK/NIDDK NIH HHS/ -- T32 GM0008275/GM/NIGMS NIH HHS/ -- T32 GM008275/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Jun 26;348(6242):1488-92. doi: 10.1126/science.aab3021. Epub 2015 Jun 4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Department of Genetics, and the Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. ; Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Department of Genetics, and the Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. Department of Molecular and Cellular Biology, Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA. ; Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Department of Genetics, and the Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. lazar@mail.med.upenn.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26044300" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CLOCK Proteins/*genetics ; Circadian Clocks/*genetics ; Circadian Rhythm/*genetics ; *Gene Expression Regulation ; Hepatocyte Nuclear Factor 6/metabolism ; Histone Deacetylases/*metabolism ; Lipid Metabolism/genetics ; Liver/metabolism ; Male ; Metabolism/*genetics ; Mice, Inbred C57BL ; Mice, Knockout ; Nuclear Receptor Subfamily 1, Group D, Member 1/genetics/*metabolism ; Nuclear Receptor Subfamily 1, Group F, Member 1/metabolism ; Organ Specificity ; Protein Binding ; Tissue Distribution
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  • 59
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-10-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kupferschmidt, Kai -- New York, N.Y. -- Science. 2015 Oct 16;350(6258):267-9. doi: 10.1126/science.350.6258.267.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26472890" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture/*trends ; *Animal Feed ; Animals ; Cattle ; Fishes ; Great Britain ; Humans ; Larva ; *Livestock ; Poultry ; Swine ; *Tenebrio
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  • 60
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dunham-Snary, Kimberly J -- Ballinger, Scott W -- New York, N.Y. -- Science. 2015 Sep 25;349(6255):1449-50. doi: 10.1126/science.aac5271.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Queen's University, Kingston, ON K7L 3N6, Canada. ; Department of Pathology, Division of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, AL 35294, USA. Center for Free Radical Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA. sballing@uab.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26404813" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Nucleus/*genetics ; DNA, Mitochondrial/*genetics ; Energy Metabolism/genetics ; Genetic Predisposition to Disease/genetics ; Genetic Therapy/*ethics/*methods ; Great Britain ; Humans ; Mitochondria/*genetics ; Mitochondrial Diseases/genetics/*therapy
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  • 61
    Publication Date: 2015-03-07
    Description: Chemokines are small proteins that function as immune modulators through activation of chemokine G protein-coupled receptors (GPCRs). Several viruses also encode chemokines and chemokine receptors to subvert the host immune response. How protein ligands activate GPCRs remains unknown. We report the crystal structure at 2.9 angstrom resolution of the human cytomegalovirus GPCR US28 in complex with the chemokine domain of human CX3CL1 (fractalkine). The globular body of CX3CL1 is perched on top of the US28 extracellular vestibule, whereas its amino terminus projects into the central core of US28. The transmembrane helices of US28 adopt an active-state-like conformation. Atomic-level simulations suggest that the agonist-independent activity of US28 may be due to an amino acid network evolved in the viral GPCR to destabilize the receptor's inactive state.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4445376/" 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/PMC4445376/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burg, John S -- Ingram, Jessica R -- Venkatakrishnan, A J -- Jude, Kevin M -- Dukkipati, Abhiram -- Feinberg, Evan N -- Angelini, Alessandro -- Waghray, Deepa -- Dror, Ron O -- Ploegh, Hidde L -- Garcia, K Christopher -- DP1 GM106409/GM/NIGMS NIH HHS/ -- R01 GM097015/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Mar 6;347(6226):1113-7. doi: 10.1126/science.aaa5026.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, 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. ; Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA. ; Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA. Department of Computer Science, Stanford University, Stanford, CA 94305, USA. Institute for Computational and Mathematical Engineering, Stanford University, Stanford, CA 94305, USA. ; Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. ; Howard Hughes Medical Institute, 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. kcgarcia@stanford.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25745166" target="_blank"〉PubMed〈/a〉
    Keywords: CCR5 Receptor Antagonists/chemistry ; Chemokine CX3CL1/*chemistry ; Crystallography, X-Ray ; Cyclohexanes/chemistry ; Humans ; Ligands ; Piperidines/chemistry ; Protein Binding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Receptors, CXCR4/antagonists & inhibitors ; Receptors, Chemokine/agonists/*chemistry ; Triazoles/chemistry ; Viral Proteins/agonists/*chemistry
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-05-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Servick, Kelly -- New York, N.Y. -- Science. 2015 May 22;348(6237):850-3. doi: 10.1126/science.348.6237.850.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25999488" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-Bacterial Agents/*isolation & purification/pharmacology ; Capital Financing ; Depsipeptides/*isolation & purification/pharmacology ; Drug Discovery/*economics/trends ; Drug Industry/*economics/trends ; *Drug Resistance, Bacterial ; European Union ; Federal Government ; Great Britain ; Soil Microbiology ; United States
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  • 63
    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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  • 64
    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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  • 65
    Publication Date: 2015-10-17
    Description: Telomerase helps maintain telomeres by processive synthesis of telomere repeat DNA at their 3'-ends, using an integral telomerase RNA (TER) and telomerase reverse transcriptase (TERT). We report the cryo-electron microscopy structure of Tetrahymena telomerase at ~9 angstrom resolution. In addition to seven known holoenzyme proteins, we identify two additional proteins that form a complex (TEB) with single-stranded telomere DNA-binding protein Teb1, paralogous to heterotrimeric replication protein A (RPA). The p75-p45-p19 subcomplex is identified as another RPA-related complex, CST (CTC1-STN1-TEN1). This study reveals the paths of TER in the TERT-TER-p65 catalytic core and single-stranded DNA exit; extensive subunit interactions of the TERT essential N-terminal domain, p50, and TEB; and other subunit identities and structures, including p19 and p45C crystal structures. Our findings provide structural and mechanistic insights into telomerase holoenzyme function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4687456/" 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/PMC4687456/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jiang, Jiansen -- Chan, Henry -- Cash, Darian D -- Miracco, Edward J -- Ogorzalek Loo, Rachel R -- Upton, Heather E -- Cascio, Duilio -- O'Brien Johnson, Reid -- Collins, Kathleen -- Loo, Joseph A -- Zhou, Z Hong -- Feigon, Juli -- GM007185/GM/NIGMS NIH HHS/ -- GM048123/GM/NIGMS NIH HHS/ -- GM071940/GM/NIGMS NIH HHS/ -- GM101874/GM/NIGMS NIH HHS/ -- GM103479/GM/NIGMS NIH HHS/ -- P41 GM103403/GM/NIGMS NIH HHS/ -- P41 RR015301/RR/NCRR NIH HHS/ -- R01 GM048123/GM/NIGMS NIH HHS/ -- R01 GM054198/GM/NIGMS NIH HHS/ -- R01 GM071940/GM/NIGMS NIH HHS/ -- R01 GM103479/GM/NIGMS NIH HHS/ -- R01GM054198/GM/NIGMS NIH HHS/ -- S10OD018111/OD/NIH HHS/ -- S10RR23057/RR/NCRR NIH HHS/ -- UL1TR000124/TR/NCATS NIH HHS/ -- New York, N.Y. -- Science. 2015 Oct 30;350(6260):aab4070. doi: 10.1126/science.aab4070. Epub 2015 Oct 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA. Department of Microbiology, Immunology, and Molecular Genetics, UCLA, Los Angeles, CA 90095, USA. California Nanosystems Institute, UCLA, Los Angeles, CA 90095, USA. ; Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA. ; Department of Biological Chemistry, UCLA, Los Angeles, CA 90095, USA. ; Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA. ; Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA. UCLA-U.S. Department of Energy (DOE) Institute of Genomics and Proteomics, UCLA, Los Angeles, CA 90095, USA. ; Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA. Department of Biological Chemistry, UCLA, Los Angeles, CA 90095, USA. UCLA-U.S. Department of Energy (DOE) Institute of Genomics and Proteomics, UCLA, Los Angeles, CA 90095, USA. ; Department of Microbiology, Immunology, and Molecular Genetics, UCLA, Los Angeles, CA 90095, USA. California Nanosystems Institute, UCLA, Los Angeles, CA 90095, USA. ; Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA. California Nanosystems Institute, UCLA, Los Angeles, CA 90095, USA. UCLA-U.S. Department of Energy (DOE) Institute of Genomics and Proteomics, UCLA, Los Angeles, CA 90095, USA. feigon@mbi.ucla.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26472759" target="_blank"〉PubMed〈/a〉
    Keywords: Catalytic Domain ; Cryoelectron Microscopy ; Crystallography, X-Ray ; DNA, Single-Stranded/chemistry ; Holoenzymes/chemistry ; Protein Binding ; Protein Conformation ; Protein Subunits/chemistry ; RNA/*chemistry ; Replication Protein A/chemistry ; Telomerase/*chemistry ; Telomere/chemistry ; Telomere Homeostasis ; Telomere-Binding Proteins ; Tetrahymena/*enzymology
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  • 66
    Publication Date: 2015-02-24
    Description: Amyotrophic lateral sclerosis (ALS) is a devastating neurological disease with no effective treatment. We report the results of a moderate-scale sequencing study aimed at increasing the number of genes known to contribute to predisposition for ALS. We performed whole-exome sequencing of 2869 ALS patients and 6405 controls. Several known ALS genes were found to be associated, and TBK1 (the gene encoding TANK-binding kinase 1) was identified as an ALS gene. TBK1 is known to bind to and phosphorylate a number of proteins involved in innate immunity and autophagy, including optineurin (OPTN) and p62 (SQSTM1/sequestosome), both of which have also been implicated in ALS. These observations reveal a key role of the autophagic pathway in ALS and suggest specific targets for therapeutic intervention.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4437632/" 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/PMC4437632/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cirulli, Elizabeth T -- Lasseigne, Brittany N -- Petrovski, Slave -- Sapp, Peter C -- Dion, Patrick A -- Leblond, Claire S -- Couthouis, Julien -- Lu, Yi-Fan -- Wang, Quanli -- Krueger, Brian J -- Ren, Zhong -- Keebler, Jonathan -- Han, Yujun -- Levy, Shawn E -- Boone, Braden E -- Wimbish, Jack R -- Waite, Lindsay L -- Jones, Angela L -- Carulli, John P -- Day-Williams, Aaron G -- Staropoli, John F -- Xin, Winnie W -- Chesi, Alessandra -- Raphael, Alya R -- McKenna-Yasek, Diane -- Cady, Janet -- Vianney de Jong, J M B -- Kenna, Kevin P -- Smith, Bradley N -- Topp, Simon -- Miller, Jack -- Gkazi, Athina -- FALS Sequencing Consortium -- Al-Chalabi, Ammar -- van den Berg, Leonard H -- Veldink, Jan -- Silani, Vincenzo -- Ticozzi, Nicola -- Shaw, Christopher E -- Baloh, Robert H -- Appel, Stanley -- Simpson, Ericka -- Lagier-Tourenne, Clotilde -- Pulst, Stefan M -- Gibson, Summer -- Trojanowski, John Q -- Elman, Lauren -- McCluskey, Leo -- Grossman, Murray -- Shneider, Neil A -- Chung, Wendy K -- Ravits, John M -- Glass, Jonathan D -- Sims, Katherine B -- Van Deerlin, Vivianna M -- Maniatis, Tom -- Hayes, Sebastian D -- Ordureau, Alban -- Swarup, Sharan -- Landers, John -- Baas, Frank -- Allen, Andrew S -- Bedlack, Richard S -- Harper, J Wade -- Gitler, Aaron D -- Rouleau, Guy A -- Brown, Robert -- Harms, Matthew B -- Cooper, Gregory M -- Harris, Tim -- Myers, Richard M -- Goldstein, David B -- 089701/Wellcome Trust/United Kingdom -- K08 NS075094/NS/NINDS NIH HHS/ -- P01 AG017586/AG/NIA NIH HHS/ -- P01 AG032953/AG/NIA NIH HHS/ -- P50 AG025688/AG/NIA NIH HHS/ -- R37 NS033123/NS/NINDS NIH HHS/ -- R37 NS083524/NS/NINDS NIH HHS/ -- T32 GM007754/GM/NIGMS NIH HHS/ -- TL1 TR001066/TR/NCATS NIH HHS/ -- UL1 TR001067/TR/NCATS NIH HHS/ -- New York, N.Y. -- Science. 2015 Mar 27;347(6229):1436-41. doi: 10.1126/science.aaa3650. Epub 2015 Feb 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Applied Genomics and Precision Medicine, Duke University School of Medicine, Durham, NC 27708, USA. ; HudsonAlpha Institute for Biotechnology, Huntsville, AL 35806, USA. ; Institute for Genomic Medicine, Columbia University, New York, NY 10032, USA. ; Department of Neurology, University of Massachusetts Medical School, Worcester, MA 01655, USA. ; Montreal Neurological Institute, Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec H3A 2B4, Canada. ; Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA. ; Duke University School of Medicine, Durham, NC 27708, USA. ; Biogen Idec, Cambridge, MA 02142, USA. ; Neurogenetics DNA Diagnostic Laboratory, Center for Human Genetics Research, Department of Neurology, Massachusetts General Hospital, Boston, MA 02114, USA. ; Neurology, Washington University School of Medicine, St. Louis, MO 63110, USA. ; Department of Genome Analysis, Academic Medical Center, Meibergdreef 9, 1105AZ Amsterdam, Netherlands. ; Academic Unit of Neurology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Republic of Ireland. ; Department of Basic and Clinical Neuroscience, King's College London, Institute of Psychiatry, Psychology and Neuroscience, London SE5 8AF, UK. ; Department of Neurology, Brain Center Rudolf Magnus, University Medical Centre Utrecht, 3508 GA Utrecht, Netherlands. ; Department of Neurology and Laboratory of Neuroscience, IRCCS Istituto Auxologico Italiano, Milan 20149, Italy, and Department of Pathophysiology and Transplantation, Dino Ferrari Center, Universita degli Studi di Milano, Milan 20122, Italy. ; Cedars Sinai Medical Center, Los Angeles, CA 90048, USA. ; Houston Methodist Hospital, Houston, TX 77030, USA, and Weill Cornell Medical College of Cornell University, New York, NY 10065, USA. ; Ludwig Institute for Cancer Research and Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA. ; Department of Neurology, University of Utah School of Medicine, Salt Lake City, UT 84112, USA. ; Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. ; Department of Neurology, Penn ALS Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. ; Department of Neurology, Penn Frontotemporal Degeneration Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA. ; Department of Neurology, Center for Motor Neuron Biology and Disease, Columbia University, New York, NY 10032, USA. ; Department of Pediatrics and Medicine, Columbia University, New York, NY 10032, USA. ; Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA. ; Department of Neurology, Emory University, Atlanta, GA 30322, USA. ; Department of Biochemistry & Molecular Biophysics, Columbia University, New York, NY 10027, USA. ; Biogen Idec, Cambridge, MA 02142, USA. Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA. ; Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA. ; Department of Biostatistics and Bioinformatics, Duke University School of Medicine, Durham, NC 27708, USA. ; Duke ALS Clinic and Durham VA Medical Center, Durham, NC 27708, USA. ; Biogen Idec, Cambridge, MA 02142, USA. tim.harris@biogenidec.com.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25700176" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/genetics/metabolism ; Adolescent ; Adult ; Aged ; Aged, 80 and over ; Amyotrophic Lateral Sclerosis/*genetics ; Autophagy/*genetics ; Exome/*genetics ; Female ; Genes ; Genetic Association Studies ; *Genetic Predisposition to Disease ; Humans ; Male ; Middle Aged ; Protein Binding ; Protein-Serine-Threonine Kinases/*genetics/metabolism ; Risk ; Sequence Analysis, DNA ; Transcription Factor TFIIIA/genetics/metabolism ; Young Adult
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 67
    Publication Date: 2015-04-11
    Description: To address how the configuration of conjugated ubiquitins determines the recognition of substrates by the proteasome, we analyzed the degradation kinetics of substrates with chemically defined ubiquitin configurations. Contrary to the view that a tetraubiquitin chain is the minimal signal for efficient degradation, we find that distributing the ubiquitins as diubiquitin chains provides a more efficient signal. To understand how the proteasome actually discriminates among ubiquitin configurations, we developed single-molecule assays that distinguished intermediate steps of degradation kinetically. The level of ubiquitin on a substrate drives proteasome-substrate interaction, whereas the chain structure of ubiquitin affects translocation into the axial channel on the proteasome. Together these two features largely determine the susceptibility of substrates for proteasomal degradation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4450770/" 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/PMC4450770/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lu, Ying -- Lee, Byung-hoon -- King, Randall W -- Finley, Daniel -- Kirschner, Marc W -- GM43601/GM/NIGMS NIH HHS/ -- GM66492/GM/NIGMS NIH HHS/ -- R01 GM039023/GM/NIGMS NIH HHS/ -- R01 GM066492/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Apr 10;348(6231):1250834. doi: 10.1126/science.1250834.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. ; Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA. ; Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. marc@hms.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25859050" target="_blank"〉PubMed〈/a〉
    Keywords: Cyclin B/metabolism ; Geminin/metabolism ; Humans ; Kinetics ; Proteasome Endopeptidase Complex/chemistry/*metabolism ; Protein Binding ; Protein Transport ; *Proteolysis ; Securin/metabolism ; Stochastic Processes ; Ubiquitin/chemistry/*metabolism ; Ubiquitinated Proteins/chemistry/*metabolism ; Ubiquitination
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 68
    Publication Date: 2015-04-11
    Description: Biological processes require specific enzymatic reactions, paradoxically involving short recognition sequences. As an example, cell-cycle timing depends on a sequence of ubiquitylation events mediated by the anaphase-promoting complex (APC) based on short redundant motifs. To understand the origin of specificity, we designed single-molecule fluorescence assays that capture transient ubiquitylation reactions. We find that the APC-mediated ubiquitylation involves a highly processive initial reaction on the substrate, followed by multiple encounters and reactions at a slower rate. The initial ubiquitylation greatly enhances the substrate's binding affinity in subsequent reactions, by both increasing the on-rate and decreasing the off-rate. We postulate that these cycles of positive feedback enable high specificity for substrates with short recognition motifs in a complex cellular environment.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4449139/" 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/PMC4449139/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lu, Ying -- Wang, Weiping -- Kirschner, Marc W -- 5R01GM039023-26/GM/NIGMS NIH HHS/ -- R01 GM039023/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Apr 10;348(6231):1248737. doi: 10.1126/science.1248737. Epub 2015 Apr 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. ; Department of Systems Biology, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. marc@hms.harvard.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25859049" target="_blank"〉PubMed〈/a〉
    Keywords: Anaphase-Promoting Complex-Cyclosome/antagonists & ; inhibitors/chemistry/*metabolism ; Cell Cycle ; Cyclin A/metabolism ; Cyclin B/metabolism ; Feedback, Physiological ; Fluorescence ; Fluorescent Dyes ; HeLa Cells ; Humans ; Kinetics ; Protein Binding ; Protein Interaction Domains and Motifs ; SMN Complex Proteins/metabolism ; Substrate Specificity ; Ubiquitin/metabolism ; Ubiquitination
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  • 69
    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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  • 70
    Publication Date: 2015-02-24
    Description: Macromolecular function is rooted in energy landscapes, where sequence determines not a single structure but an ensemble of conformations. Hence, evolution modifies a protein's function by altering its energy landscape. Here, we recreate the evolutionary pathway between two modern human oncogenes, Src and Abl, by reconstructing their common ancestors. Our evolutionary reconstruction combined with x-ray structures of the common ancestor and pre-steady-state kinetics reveals a detailed atomistic mechanism for selectivity of the successful cancer drug Gleevec. Gleevec affinity is gained during the evolutionary trajectory toward Abl and lost toward Src, primarily by shifting an induced-fit equilibrium that is also disrupted in the clinical T315I resistance mutation. This work reveals the mechanism of Gleevec specificity while offering insights into how energy landscapes evolve.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4405104/" 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/PMC4405104/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, C -- Agafonov, R V -- Hoemberger, M -- Kutter, S -- Zorba, A -- Halpin, J -- Buosi, V -- Otten, R -- Waterman, D -- Theobald, D L -- Kern, D -- GM094468/GM/NIGMS NIH HHS/ -- GM096053/GM/NIGMS NIH HHS/ -- GM100966-01/GM/NIGMS NIH HHS/ -- R01 GM094468/GM/NIGMS NIH HHS/ -- R01 GM096053/GM/NIGMS NIH HHS/ -- R01 GM100966/GM/NIGMS NIH HHS/ -- T32 EB009419/EB/NIBIB NIH HHS/ -- T32 GM007596/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2015 Feb 20;347(6224):882-6. doi: 10.1126/science.aaa1823.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry, Brandeis University, Waltham, MA 02452, USA. ; Department of Biochemistry, Brandeis University, Waltham, MA 02452, USA. ; Howard Hughes Medical Institute and Department of Biochemistry, Brandeis University, Waltham, MA 02452, USA. dkern@brandeis.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25700521" target="_blank"〉PubMed〈/a〉
    Keywords: Antineoplastic Agents/chemistry/*pharmacology ; Benzamides/chemistry/*pharmacology ; Drug Resistance, Neoplasm/*genetics ; Entropy ; *Evolution, Molecular ; Humans ; Imatinib Mesylate ; Mutation ; Oncogene Proteins v-abl/chemistry/genetics ; Phylogeny ; Piperazines/chemistry/*pharmacology ; Protein Binding ; Protein Kinase Inhibitors/chemistry/*pharmacology ; Protein Structure, Secondary ; Pyrimidines/chemistry/*pharmacology ; src-Family Kinases/*chemistry/classification/genetics
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  • 71
    Publication Date: 2015-04-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cohen, I Glenn -- Savulescu, Julian -- Adashi, Eli Y -- New York, N.Y. -- Science. 2015 Apr 10;348(6231):178-80. doi: 10.1126/science.aaa8153. Epub 2015 Apr 9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Harvard Law School, Petrie-Flom Center for Health Law Policy, Biotechnology, and Bioethics, Harvard University, Cambridge, MA, USA. igcohen@law.harvard.edu. ; Oxford Uehiro Centre for Practical Ethics, University of Oxford, Oxford, UK. ; Warren Alpert Medical School, Brown University, Providence, RI, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25859028" target="_blank"〉PubMed〈/a〉
    Keywords: Clinical Trials as Topic ; DNA, Mitochondrial/*genetics ; Genetic Therapy/ethics/*legislation & jurisprudence ; *Government Regulation ; Great Britain ; Humans ; Mitochondrial Diseases/*genetics/*prevention & control/therapy ; Public Policy ; United States ; United States Food and Drug Administration/legislation & jurisprudence
    Print ISSN: 0036-8075
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  • 72
    Publication Date: 2015-02-28
    Description: The Mesolithic-to-Neolithic transition marked the time when a hunter-gatherer economy gave way to agriculture, coinciding with rising sea levels. Bouldnor Cliff, is a submarine archaeological site off the Isle of Wight in the United Kingdom that has a well-preserved Mesolithic paleosol dated to 8000 years before the present. We analyzed a core obtained from sealed sediments, combining evidence from microgeomorphology and microfossils with sedimentary ancient DNA (sedaDNA) analyses to reconstruct floral and faunal changes during the occupation of this site, before it was submerged. In agreement with palynological analyses, the sedaDNA sequences suggest a mixed habitat of oak forest and herbaceous plants. However, they also provide evidence of wheat 2000 years earlier than mainland Britain and 400 years earlier than proximate European sites. These results suggest that sophisticated social networks linked the Neolithic front in southern Europe to the Mesolithic peoples of northern Europe.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, Oliver -- Momber, Garry -- Bates, Richard -- Garwood, Paul -- Fitch, Simon -- Pallen, Mark -- Gaffney, Vincent -- Allaby, Robin G -- New York, N.Y. -- Science. 2015 Feb 27;347(6225):998-1001. doi: 10.1126/science.1261278.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK. ; Maritime Archaeology Trust, Room W1/95, National Oceanography Centre, Empress Dock, Southampton SO14 3ZH, UK. ; Department of Earth Sciences, University of St Andrews, St Andrews, Fife KY16 9AL, Scotland. ; Department of Classics, Ancient History and Archaeology, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK. ; School of History and Cultures, University of Birmingham, IBM VISTA ERI Building, Pritchatts Road, Birmingham B15 2TT, UK. ; Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK. ; Division of Archaeological, Geographical and Environmental Sciences, University of Bradford, Bradford, West Yorkshire BD7 1DP, UK. ; School of Life Sciences, University of Warwick, Coventry CV4 7AL, UK. r.g.allaby@warwick.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25722413" target="_blank"〉PubMed〈/a〉
    Keywords: DNA, Plant/genetics/*history ; Fossils ; Geologic Sediments/chemistry ; Great Britain ; History, Ancient ; Triticum/anatomy & histology/genetics/*history
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  • 73
    Publication Date: 2015-05-16
    Description: The centrosome organizes microtubule arrays within animal cells and comprises two centrioles surrounded by an amorphous protein mass called the pericentriolar material (PCM). Despite the importance of centrosomes as microtubule-organizing centers, the mechanism and regulation of PCM assembly are not well understood. In Caenorhabditis elegans, PCM assembly requires the coiled-coil protein SPD-5. We found that recombinant SPD-5 could polymerize to form micrometer-sized porous networks in vitro. Network assembly was accelerated by two conserved regulators that control PCM assembly in vivo, Polo-like kinase-1 and SPD-2/Cep192. Only the assembled SPD-5 networks, and not unassembled SPD-5 protein, functioned as a scaffold for other PCM proteins. Thus, PCM size and binding capacity emerge from the regulated polymerization of one coiled-coil protein to form a porous network.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Woodruff, Jeffrey B -- Wueseke, Oliver -- Viscardi, Valeria -- Mahamid, Julia -- Ochoa, Stacy D -- Bunkenborg, Jakob -- Widlund, Per O -- Pozniakovsky, Andrei -- Zanin, Esther -- Bahmanyar, Shirin -- Zinke, Andrea -- Hong, Sun Hae -- Decker, Marcus -- Baumeister, Wolfgang -- Andersen, Jens S -- Oegema, Karen -- Hyman, Anthony A -- R01-GM074207/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 May 15;348(6236):808-12. doi: 10.1126/science.aaa3923.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany. ; Department of Cellular and Molecular Medicine, Ludwig Institute for Cancer Research, University of California, San Diego, La Jolla, CA 92093, USA. ; Department of Molecular Structural Biology, Max Planck Institute of Biochemistry, Martinsried 82152, Germany. ; Department of Clinical Biochemistry, Copenhagen University Hospital, Hvidovre 2650, Denmark. Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark. ; Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA. ; Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark. ; Department of Cellular and Molecular Medicine, Ludwig Institute for Cancer Research, University of California, San Diego, La Jolla, CA 92093, USA. hyman@mpi-cbg.de koegema@ucsd.edu. ; Max Planck Institute of Molecular Cell Biology and Genetics, Pfotenhauerstrasse 108, 01307 Dresden, Germany. hyman@mpi-cbg.de koegema@ucsd.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25977552" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/*genetics/*metabolism ; Caenorhabditis elegans Proteins/chemistry/genetics/*metabolism ; Cell Cycle Proteins/chemistry/genetics/*metabolism ; Centrosome/*metabolism/ultrasonography ; Metabolic Networks and Pathways ; Phosphorylation ; Polymerization ; Protein Binding ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/*metabolism ; Proto-Oncogene Proteins/*metabolism
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  • 74
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-11-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marais, Richard -- New York, N.Y. -- Science. 2015 Nov 27;350(6264):1040. doi: 10.1126/science.aad8404.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉CRUK Manchester Institute, University of Manchester, Manchester M20 4BX, UK,. richard.marais@cruk.manchester.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26612942" target="_blank"〉PubMed〈/a〉
    Keywords: Biomedical Research/history ; Cell Biology/*history ; Great Britain ; History, 20th Century ; History, 21st Century ; Humans ; Neoplasms/*history/therapy ; Proto-Oncogene Proteins p21(ras)/*history
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 75
    Publication Date: 2015-09-05
    Description: Fusion of intracellular transport vesicles requires soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) and Sec1/Munc18-family (SM) proteins. Membrane-bridging SNARE complexes are critical for fusion, but their spontaneous assembly is inefficient and may require SM proteins in vivo. We report x-ray structures of Vps33, the SM subunit of the yeast homotypic fusion and vacuole protein-sorting (HOPS) complex, bound to two individual SNAREs. The two SNAREs, one from each membrane, are held in the correct orientation and register for subsequent complex assembly. Vps33 and potentially other SM proteins could thus act as templates for generating partially zipped SNARE assembly intermediates. HOPS was essential to mediate SNARE complex assembly at physiological SNARE concentrations. Thus, Vps33 appears to catalyze SNARE complex assembly through specific SNARE motif recognition.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4727825/" 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/PMC4727825/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, Richard W -- Jeffrey, Philip D -- Zick, Michael -- Phillips, Ben P -- Wickner, William T -- Hughson, Frederick M -- GM071574/GM/NIGMS NIH HHS/ -- GM23377/GM/NIGMS NIH HHS/ -- R01 GM071574/GM/NIGMS NIH HHS/ -- T32 GM007388/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 Sep 4;349(6252):1111-4. doi: 10.1126/science.aac7906.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA. ; Department of Biochemistry, Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA. ; Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA. hughson@princeton.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26339030" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallography, X-Ray ; Membrane Proteins/chemistry/metabolism ; Munc18 Proteins/*metabolism ; Protein Binding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Qa-SNARE Proteins/*metabolism ; R-SNARE Proteins/*metabolism ; Saccharomyces cerevisiae ; Saccharomyces cerevisiae Proteins/chemistry/*metabolism/ultrastructure ; Synaptosomal-Associated Protein 25/chemistry/metabolism ; Vesicular Transport Proteins/chemistry/*metabolism/ultrastructure
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 76
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-01-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2015 Dec 4;350(6265):1140-1. doi: 10.1126/science.350.6265.1140.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26785451" target="_blank"〉PubMed〈/a〉
    Keywords: Biomedical Research/*economics ; Budgets ; Great Britain
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  • 77
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    Unknown
    American Association for the Advancement of Science (AAAS)
    Publication Date: 2015-02-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2015 Feb 27;347(6225):936. doi: 10.1126/science.347.6225.936.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25722390" target="_blank"〉PubMed〈/a〉
    Keywords: *Budgets ; Gardening/*economics ; Great Britain ; *Plants
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  • 78
    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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  • 79
    Publication Date: 2015-05-16
    Description: Reactivation of telomerase reverse transcriptase (TERT) expression enables cells to overcome replicative senescence and escape apoptosis, which are fundamental steps in the initiation of human cancer. Multiple cancer types, including up to 83% of glioblastomas (GBMs), harbor highly recurrent TERT promoter mutations of unknown function but specific to two nucleotide positions. We identified the functional consequence of these mutations in GBMs to be recruitment of the multimeric GA-binding protein (GABP) transcription factor specifically to the mutant promoter. Allelic recruitment of GABP is consistently observed across four cancer types, highlighting a shared mechanism underlying TERT reactivation. Tandem flanking native E26 transformation-specific motifs critically cooperate with these mutations to activate TERT, probably by facilitating GABP heterotetramer binding. GABP thus directly links TERT promoter mutations to aberrant expression in multiple cancers.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4456397/" 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/PMC4456397/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bell, Robert J A -- Rube, H Tomas -- Kreig, Alex -- Mancini, Andrew -- Fouse, Shaun D -- Nagarajan, Raman P -- Choi, Serah -- Hong, Chibo -- He, Daniel -- Pekmezci, Melike -- Wiencke, John K -- Wrensch, Margaret R -- Chang, Susan M -- Walsh, Kyle M -- Myong, Sua -- Song, Jun S -- Costello, Joseph F -- DP2 GM105453/GM/NIGMS NIH HHS/ -- P01 CA118816/CA/NCI NIH HHS/ -- P01CA118816-06/CA/NCI NIH HHS/ -- P50CA097257/CA/NCI NIH HHS/ -- R01 CA163336/CA/NCI NIH HHS/ -- R01 CA169316/CA/NCI NIH HHS/ -- R01CA163336/CA/NCI NIH HHS/ -- R01CA169316-01/CA/NCI NIH HHS/ -- R01CA52689/CA/NCI NIH HHS/ -- R25CA112355/CA/NCI NIH HHS/ -- T32 GM008568/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2015 May 29;348(6238):1036-9. doi: 10.1126/science.aab0015. Epub 2015 May 14.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurological Surgery, University of California, San Francisco, CA. Department of Biostatistics and Epidemiology, University of California, San Francisco, CA. ; Department of Physics, University of Illinois, Urbana-Champaign, IL. Institute for Genomic Biology, University of Illinois, Urbana-Champaign, IL. ; Institute for Genomic Biology, University of Illinois, Urbana-Champaign, IL. Department of Bioengineering, University of Illinois, Urbana-Champaign, IL. ; Department of Neurological Surgery, University of California, San Francisco, CA. ; Department of Radiation Oncology, University of California San Francisco, San Francisco, CA. ; Department of Anatomic Pathology, University of California San Francisco Medical School, San Francisco, CA 94143, USA. ; Division of Neuroepidemiology, Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94158, USA. Institute for Human Genetics, University of California, San Francisco, San Francisco, CA 94143, USA. ; Division of Neuroepidemiology, Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA 94158, USA. ; Department of Biostatistics and Epidemiology, University of California, San Francisco, CA. Department of Physics, University of Illinois, Urbana-Champaign, IL. Institute for Genomic Biology, University of Illinois, Urbana-Champaign, IL. Department of Bioengineering, University of Illinois, Urbana-Champaign, IL. songj@illinois.edu joseph.costello@ucsf.edu. ; Department of Neurological Surgery, University of California, San Francisco, CA. songj@illinois.edu joseph.costello@ucsf.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25977370" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Cell Line, Tumor ; GA-Binding Protein Transcription Factor/*metabolism ; *Gene Expression Regulation, Enzymologic ; *Gene Expression Regulation, Neoplastic ; Glioblastoma/*genetics ; Humans ; Promoter Regions, Genetic ; Protein Binding ; Protein Multimerization ; Telomerase/*genetics
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  • 80
    Publication Date: 2015-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zahn, Laura M -- Travis, John -- New York, N.Y. -- Science. 2015 Sep 25;349(6255):1470-1. doi: 10.1126/science.349.6255.1470.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26404821" target="_blank"〉PubMed〈/a〉
    Keywords: *DNA Mutational Analysis ; Disease/*genetics ; Great Britain ; Humans ; Mutation
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  • 81
    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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  • 82
    Publication Date: 2016-03-05
    Description: Examining complete gene knockouts within a viable organism can inform on gene function. We sequenced the exomes of 3222 British adults of Pakistani heritage with high parental relatedness, discovering 1111 rare-variant homozygous genotypes with predicted loss of function (knockouts) in 781 genes. We observed 13.7% fewer homozygous knockout genotypes than we expected, implying an average load of 1.6 recessive-lethal-equivalent loss-of-function (LOF) variants per adult. When genetic data were linked to the individuals' lifelong health records, we observed no significant relationship between gene knockouts and clinical consultation or prescription rate. In this data set, we identified a healthy PRDM9-knockout mother and performed phased genome sequencing on her, her child, and control individuals. Our results show that meiotic recombination sites are localized away from PRDM9-dependent hotspots. Thus, natural LOF variants inform on essential genetic loci and demonstrate PRDM9 redundancy in humans.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Narasimhan, Vagheesh M -- Hunt, Karen A -- Mason, Dan -- Baker, Christopher L -- Karczewski, Konrad J -- Barnes, Michael R -- Barnett, Anthony H -- Bates, Chris -- Bellary, Srikanth -- Bockett, Nicholas A -- Giorda, Kristina -- Griffiths, Christopher J -- Hemingway, Harry -- Jia, Zhilong -- Kelly, M Ann -- Khawaja, Hajrah A -- Lek, Monkol -- McCarthy, Shane -- McEachan, Rosie -- O'Donnell-Luria, Anne -- Paigen, Kenneth -- Parisinos, Constantinos A -- Sheridan, Eamonn -- Southgate, Laura -- Tee, Louise -- Thomas, Mark -- Xue, Yali -- Schnall-Levin, Michael -- Petkov, Petko M -- Tyler-Smith, Chris -- Maher, Eamonn R -- Trembath, Richard C -- MacArthur, Daniel G -- Wright, John -- Durbin, Richard -- van Heel, David A -- GM 099640/GM/NIGMS NIH HHS/ -- MR/M009017/1/Medical Research Council/United Kingdom -- R01 GM104371/GM/NIGMS NIH HHS/ -- R01GM104371/GM/NIGMS NIH HHS/ -- WT098051/Wellcome Trust/United Kingdom -- WT099769/Wellcome Trust/United Kingdom -- WT101597/Wellcome Trust/United Kingdom -- WT102627/Wellcome Trust/United Kingdom -- British Heart Foundation/United Kingdom -- Arthritis Research UK/United Kingdom -- Cancer Research UK/United Kingdom -- Department of Health/United Kingdom -- Chief Scientist Office/United Kingdom -- New York, N.Y. -- Science. 2016 Apr 22;352(6284):474-7. doi: 10.1126/science.aac8624. Epub 2016 Mar 3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK. ; Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK. ; Bradford Institute for Health Research, Bradford Teaching Hospitals National Health Service (NHS) Foundation Trust, Bradford BD9 6RJ, UK. ; Center for Genome Dynamics, The Jackson Laboratory, Bar Harbor, ME 04609, USA. ; Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA. Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. ; William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK. ; Diabetes and Endocrine Centre, Heart of England NHS Foundation Trust and University of Birmingham, Birmingham B9 5SS, UK. ; TPP, Mill House, Troy Road, Leeds LS18 5TN, UK. ; Aston Research Centre for Healthy Ageing, Aston University, Birmingham B4 7ET, UK. ; 10X Genomics, 7068 Koll Center Parkway, Suite 415, Pleasanton, CA 94566, USA. ; Farr Institute of Health Informatics Research, London NW1 2DA, UK. Institute of Health Informatics, University College London, London NW1 2DA, UK. ; School of Clinical and Experimental Medicine, University of Birmingham, Birmingham B15 2TT, UK. ; Department of Medical Genetics, University of Cambridge and National Institute for Health Research (NIHR) Cambridge Biomedical Research Centre, Box 238, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK. Cambridge University Hospitals NHS Foundation Trust, Cambridge Biomedical Campus, Cambridge CB2 0QQ, UK. ; Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK. Faculty of Life Sciences and Medicine, King's College London, London SE1 1UL, UK. ; Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK. rd@sanger.ac.uk d.vanheel@qmul.ac.uk. ; Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK. rd@sanger.ac.uk d.vanheel@qmul.ac.uk.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26940866" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; *Consanguinity ; DNA Mutational Analysis ; Drug Prescriptions ; Exome/genetics ; Female ; Fertility ; Gene Knockout Techniques ; Genes, Lethal ; Genetic Loci ; Genome, Human ; Great Britain ; *Health ; Histone-Lysine N-Methyltransferase/*genetics ; Homologous Recombination ; Homozygote ; Humans ; Male ; Mothers ; Pakistan/ethnology ; Phenotype
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  • 83
    Publication Date: 2015-10-10
    Description: Leucine is a proteogenic amino acid that also regulates many aspects of mammalian physiology, in large part by activating the mTOR complex 1 (mTORC1) protein kinase, a master growth controller. Amino acids signal to mTORC1 through the Rag guanosine triphosphatases (GTPases). Several factors regulate the Rags, including GATOR1, aGTPase-activating protein; GATOR2, a positive regulator of unknown function; and Sestrin2, a GATOR2-interacting protein that inhibits mTORC1 signaling. We find that leucine, but not arginine, disrupts the Sestrin2-GATOR2 interaction by binding to Sestrin2 with a dissociation constant of 20 micromolar, which is the leucine concentration that half-maximally activates mTORC1. The leucine-binding capacity of Sestrin2 is required for leucine to activate mTORC1 in cells. These results indicate that Sestrin2 is a leucine sensor for the mTORC1 pathway.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698017/" 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/PMC4698017/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolfson, Rachel L -- Chantranupong, Lynne -- Saxton, Robert A -- Shen, Kuang -- Scaria, Sonia M -- Cantor, Jason R -- Sabatini, David M -- AI47389/AI/NIAID NIH HHS/ -- F30 CA189333/CA/NCI NIH HHS/ -- F31 CA180271/CA/NCI NIH HHS/ -- R01 CA103866/CA/NCI NIH HHS/ -- R37 AI047389/AI/NIAID NIH HHS/ -- T32 GM007753/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2016 Jan 1;351(6268):43-8. doi: 10.1126/science.aab2674. Epub 2015 Oct 8.〈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. ; 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. ; 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/26449471" target="_blank"〉PubMed〈/a〉
    Keywords: GTPase-Activating Proteins/*metabolism ; HEK293 Cells ; Humans ; Leucine/*metabolism ; Metabolic Networks and Pathways ; Multiprotein Complexes/*metabolism ; Nuclear Proteins/chemistry/genetics/*metabolism ; Protein Binding ; Proteins/chemistry/*metabolism ; Signal Transduction ; TOR Serine-Threonine Kinases/*metabolism
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  • 84
    Publication Date: 2015-12-19
    Description: Target of rapamycin (TOR), a conserved protein kinase and central controller of cell growth, functions in two structurally and functionally distinct complexes: TORC1 and TORC2. Dysregulation of mammalian TOR (mTOR) signaling is implicated in pathologies that include diabetes, cancer, and neurodegeneration. We resolved the architecture of human mTORC1 (mTOR with subunits Raptor and mLST8) bound to FK506 binding protein (FKBP)-rapamycin, by combining cryo-electron microscopy at 5.9 angstrom resolution with crystallographic studies of Chaetomium thermophilum Raptor at 4.3 angstrom resolution. The structure explains how FKBP-rapamycin and architectural elements of mTORC1 limit access to the recessed active site. Consistent with a role in substrate recognition and delivery, the conserved amino-terminal domain of Raptor is juxtaposed to the kinase active site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aylett, Christopher H S -- Sauer, Evelyn -- Imseng, Stefan -- Boehringer, Daniel -- Hall, Michael N -- Ban, Nenad -- Maier, Timm -- New York, N.Y. -- Science. 2016 Jan 1;351(6268):48-52. doi: 10.1126/science.aaa3870. Epub 2015 Dec 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Molecular Biology and Biophysics, ETH Zurich, Zurich, Switzerland. ; Biozentrum, University of Basel, Basel, Switzerland. ; Biozentrum, University of Basel, Basel, Switzerland. ban@mol.biol.ethz.ch m.hall@unibas.ch timm.maier@unibas.ch. ; Institute of Molecular Biology and Biophysics, ETH Zurich, Zurich, Switzerland. ban@mol.biol.ethz.ch m.hall@unibas.ch timm.maier@unibas.ch.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26678875" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/*chemistry ; Catalytic Domain ; Cryoelectron Microscopy ; Humans ; Multiprotein Complexes/*chemistry ; Protein Binding ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Substrate Specificity ; TOR Serine-Threonine Kinases/*chemistry ; Tacrolimus Binding Proteins/*chemistry
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  • 85
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-04-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, Elizabeth -- New York, N.Y. -- Science. 2016 Apr 22;352(6284):394-5. doi: 10.1126/science.352.6284.394. Epub 2016 Apr 21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27102455" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Evolution, Molecular ; Foundations ; Genes ; Genetic Research/*economics ; Great Britain ; Humans ; *Research Support as Topic ; *Selection, Genetic ; Sweden ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 86
    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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  • 87
    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
    Print ISSN: 0036-8075
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  • 88
    Publication Date: 2015-08-27
    Description: Phytosulfokine (PSK) is a disulfated pentapeptide that has a ubiquitous role in plant growth and development. PSK is perceived by its receptor PSKR, a leucine-rich repeat receptor kinase (LRR-RK). The mechanisms underlying the recognition of PSK, the activation of PSKR and the identity of the components downstream of the initial binding remain elusive. Here we report the crystal structures of the extracellular LRR domain of PSKR in free, PSK- and co-receptor-bound forms. The structures reveal that PSK interacts mainly with a beta-strand from the island domain of PSKR, forming an anti-beta-sheet. The two sulfate moieties of PSK interact directly with PSKR, sensitizing PSKR recognition of PSK. Supported by biochemical, structural and genetic evidence, PSK binding enhances PSKR heterodimerization with the somatic embryogenesis receptor-like kinases (SERKs). However, PSK is not directly involved in PSKR-SERK interaction but stabilizes PSKR island domain for recruitment of a SERK. Our data reveal the structural basis for PSKR recognition of PSK and allosteric activation of PSKR by PSK, opening up new avenues for the design of PSKR-specific small molecules.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, Jizong -- Li, Hongju -- Han, Zhifu -- Zhang, Heqiao -- Wang, Tong -- Lin, Guangzhong -- Chang, Junbiao -- Yang, Weicai -- Chai, Jijie -- England -- Nature. 2015 Sep 10;525(7568):265-8. doi: 10.1038/nature14858. Epub 2015 Aug 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ministry of Education Key Laboratory of Protein Science, Center for Structural Biology, School of Life Sciences, Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, China. ; State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China. ; School of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26308901" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation/drug effects ; Arabidopsis/*chemistry ; Arabidopsis Proteins/*agonists/*chemistry/genetics/metabolism ; Crystallography, X-Ray ; Models, Molecular ; Mutation/genetics ; Peptide Hormones/chemistry/metabolism/pharmacology ; Plant Growth Regulators/*chemistry/metabolism/*pharmacology ; Plant Proteins/chemistry/metabolism/pharmacology ; Protein Binding ; Protein Kinases/chemistry/metabolism ; Protein Multimerization/drug effects ; Protein Stability ; Protein Structure, Secondary/drug effects ; Protein Structure, Tertiary/drug effects ; Protein-Serine-Threonine Kinases/chemistry/metabolism ; Receptors, Cell Surface/*agonists/*chemistry/genetics/metabolism ; Substrate Specificity
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    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 89
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    Nature Publishing Group (NPG)
    Publication Date: 2015-11-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2015 Nov 12;527(7577):133-4. doi: 10.1038/527133b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26560261" target="_blank"〉PubMed〈/a〉
    Keywords: Budgets/legislation & jurisprudence ; *Federal Government ; Great Britain ; Research/*economics ; Research Support as Topic/*legislation & jurisprudence ; Universities/*economics
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  • 90
    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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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 91
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    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2015-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ceci, Chiara -- England -- Nature. 2015 Jun 4;522(7554):7. doi: 10.1038/522007a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26040860" target="_blank"〉PubMed〈/a〉
    Keywords: *Chemistry/education/manpower/trends ; Cooking ; Great Britain ; Pharmacists ; Problem Solving ; *Public Opinion ; Schools
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 92
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    Unknown
    Nature Publishing Group (NPG)
    Publication Date: 2016-04-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Biewener, Andrew A -- Wilson, Alan -- England -- Nature. 2016 Apr 28;532(7600):442. doi: 10.1038/532442a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Harvard University in Cambridge, Massachusetts, USA, and director of the Concord Field Station, where he collaborated with Neill Alexander. ; Royal Veterinary College in London. Alexander examined Wilson's PhD thesis.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27121834" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomechanical Phenomena ; Dinosaurs/physiology ; Gait/*physiology ; Great Britain ; History, 20th Century ; History, 21st Century ; Movement/physiology ; Zoology/*history
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  • 93
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    Nature Publishing Group (NPG)
    Publication Date: 2016-01-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2016 Jan 28;529(7587):437-8. doi: 10.1038/529437b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26819007" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; China ; Cities ; Congo ; Conservation of Natural Resources/*legislation & jurisprudence ; Ecosystem ; Great Britain ; *Parks, Recreational/legislation & jurisprudence ; Pleasure ; Uganda ; United States ; *Wilderness
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  • 94
    Publication Date: 2016-02-24
    Description: All Gram-negative bacteria, mitochondria and chloroplasts have outer membrane proteins (OMPs) that perform many fundamental biological processes. The OMPs in Gram-negative bacteria are inserted and folded into the outer membrane by the beta-barrel assembly machinery (BAM). The mechanism involved is poorly understood, owing to the absence of a structure of the entire BAM complex. Here we report two crystal structures of the Escherichia coli BAM complex in two distinct states: an inward-open state and a lateral-open state. Our structures reveal that the five polypeptide transport-associated domains of BamA form a ring architecture with four associated lipoproteins, BamB-BamE, in the periplasm. Our structural, functional studies and molecular dynamics simulations indicate that these subunits rotate with respect to the integral membrane beta-barrel of BamA to induce movement of the beta-strands of the barrel and promote insertion of the nascent OMP.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gu, Yinghong -- Li, Huanyu -- Dong, Haohao -- Zeng, Yi -- Zhang, Zhengyu -- Paterson, Neil G -- Stansfeld, Phillip J -- Wang, Zhongshan -- Zhang, Yizheng -- Wang, Wenjian -- Dong, Changjiang -- G1100110/1/Medical Research Council/United Kingdom -- WT106121MA/Wellcome Trust/United Kingdom -- England -- Nature. 2016 Mar 3;531(7592):64-9. doi: 10.1038/nature17199. Epub 2016 Feb 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biomedical Research Centre, Norwich Medical School, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK. ; Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK. ; Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK. ; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical College, Xuzhou 221004, China. ; Key Laboratory of Bio-resources and Eco-environment, Ministry of Education, Sichuan Key Laboratory of Molecular Biology and Biotechnology, College of Life Sciences, Sichuan University, Chengdu 610064, China. ; Laboratory of Department of Surgery, the First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26901871" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Outer Membrane Proteins/*chemistry/*metabolism ; Crystallography, X-Ray ; Escherichia coli/*chemistry ; Escherichia coli Proteins/*chemistry/*metabolism ; Lipoproteins/chemistry/metabolism ; Models, Molecular ; Molecular Dynamics Simulation ; Movement ; Multiprotein Complexes/*chemistry/*metabolism ; Periplasm/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Rotation
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  • 95
    Publication Date: 2016-03-05
    Description: HKU1 is a human betacoronavirus that causes mild yet prevalent respiratory disease, and is related to the zoonotic SARS and MERS betacoronaviruses, which have high fatality rates and pandemic potential. Cell tropism and host range is determined in part by the coronavirus spike (S) protein, which binds cellular receptors and mediates membrane fusion. As the largest known class I fusion protein, its size and extensive glycosylation have hindered structural studies of the full ectodomain, thus preventing a molecular understanding of its function and limiting development of effective interventions. Here we present the 4.0 A resolution structure of the trimeric HKU1 S protein determined using single-particle cryo-electron microscopy. In the pre-fusion conformation, the receptor-binding subunits, S1, rest above the fusion-mediating subunits, S2, preventing their conformational rearrangement. Surprisingly, the S1 C-terminal domains are interdigitated and form extensive quaternary interactions that occlude surfaces known in other coronaviruses to bind protein receptors. These features, along with the location of the two protease sites known to be important for coronavirus entry, provide a structural basis to support a model of membrane fusion mediated by progressive S protein destabilization through receptor binding and proteolytic cleavage. These studies should also serve as a foundation for the structure-based design of betacoronavirus vaccine immunogens.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4860016/" 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/PMC4860016/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kirchdoerfer, Robert N -- Cottrell, Christopher A -- Wang, Nianshuang -- Pallesen, Jesper -- Yassine, Hadi M -- Turner, Hannah L -- Corbett, Kizzmekia S -- Graham, Barney S -- McLellan, Jason S -- Ward, Andrew B -- R56 AI118016/AI/NIAID NIH HHS/ -- Intramural NIH HHS/ -- England -- Nature. 2016 Mar 3;531(7592):118-21. doi: 10.1038/nature17200.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA. ; Department of Biochemistry, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire 03755, USA. ; Viral Pathogenesis Laboratory, National Institute of Allergy and Infectious Diseases, Building 40, Room 2502, 40 Convent Drive, Bethesda, Maryland 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26935699" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Coronavirus/*chemistry/*ultrastructure ; Cryoelectron Microscopy ; Humans ; Membrane Fusion ; Models, Molecular ; Protein Binding ; Protein Multimerization ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Proteolysis ; Receptors, Virus/metabolism ; Spike Glycoprotein, Coronavirus/*chemistry/metabolism/*ultrastructure ; Viral Vaccines/chemistry/immunology ; Virus Internalization
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  • 96
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    Nature Publishing Group (NPG)
    Publication Date: 2016-04-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Briggs, Adam -- England -- Nature. 2016 Mar 31;531(7596):551. doi: 10.1038/531551a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Oxford, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27029244" target="_blank"〉PubMed〈/a〉
    Keywords: Beverages/analysis/*economics ; Child ; Dietary Sucrose/*adverse effects ; Food Industry/*economics/*legislation & jurisprudence ; Great Britain ; *Health Policy ; Humans ; *Legislation, Food ; Obesity/epidemiology/prevention & control ; Pediatric Obesity/prevention & control ; Public Health/legislation & jurisprudence ; Taxes/*legislation & jurisprudence
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  • 97
    Publication Date: 2016-01-07
    Description: CRISPR-Cas9 nucleases are widely used for genome editing but can induce unwanted off-target mutations. Existing strategies for reducing genome-wide off-target effects of the widely used Streptococcus pyogenes Cas9 (SpCas9) are imperfect, possessing only partial or unproven efficacies and other limitations that constrain their use. Here we describe SpCas9-HF1, a high-fidelity variant harbouring alterations designed to reduce non-specific DNA contacts. SpCas9-HF1 retains on-target activities comparable to wild-type SpCas9 with 〉85% of single-guide RNAs (sgRNAs) tested in human cells. Notably, with sgRNAs targeted to standard non-repetitive sequences, SpCas9-HF1 rendered all or nearly all off-target events undetectable by genome-wide break capture and targeted sequencing methods. Even for atypical, repetitive target sites, the vast majority of off-target mutations induced by wild-type SpCas9 were not detected with SpCas9-HF1. With its exceptional precision, SpCas9-HF1 provides an alternative to wild-type SpCas9 for research and therapeutic applications. More broadly, our results suggest a general strategy for optimizing genome-wide specificities of other CRISPR-RNA-guided nucleases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleinstiver, Benjamin P -- Pattanayak, Vikram -- Prew, Michelle S -- Tsai, Shengdar Q -- Nguyen, Nhu T -- Zheng, Zongli -- Joung, J Keith -- DP1 GM105378/DP/NCCDPHP CDC HHS/ -- R01 GM088040/GM/NIGMS NIH HHS/ -- R01 GM107427/GM/NIGMS NIH HHS/ -- England -- Nature. 2016 Jan 28;529(7587):490-5. doi: 10.1038/nature16526. Epub 2016 Jan 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pathology Unit, Center for Cancer Research, and Center for Computational and Integrative Biology, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA. ; Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26735016" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; CRISPR-Associated Proteins/*genetics/*metabolism ; CRISPR-Cas Systems/*physiology ; Clustered Regularly Interspaced Short Palindromic Repeats/*genetics ; DNA/genetics/metabolism ; DNA-Binding Proteins/genetics/metabolism ; Endonucleases/genetics/*metabolism ; *Genetic Engineering ; Genome, Human/*genetics ; Humans ; Mutation ; Protein Binding ; RNA/genetics ; Reproducibility of Results ; Sequence Analysis, DNA ; Streptococcus pyogenes/enzymology/genetics ; Substrate Specificity
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 98
    Publication Date: 2016-04-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cressey, Daniel -- England -- Nature. 2016 Mar 31;531(7596):559. doi: 10.1038/531559a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27029257" target="_blank"〉PubMed〈/a〉
    Keywords: European Union/economics/*organization & administration ; Great Britain ; Public Opinion ; *Research Personnel ; Science/economics/*organization & administration/standards
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 99
    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
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 100
    Publication Date: 2016-04-29
    Description: Umbilical cord blood-derived haematopoietic stem cells (HSCs) are essential for many life-saving regenerative therapies. However, despite their advantages for transplantation, their clinical use is restricted because HSCs in cord blood are found only in small numbers. Small molecules that enhance haematopoietic stem and progenitor cell (HSPC) expansion in culture have been identified, but in many cases their mechanisms of action or the nature of the pathways they impinge on are poorly understood. A greater understanding of the molecular circuitry that underpins the self-renewal of human HSCs will facilitate the development of targeted strategies that expand HSCs for regenerative therapies. Whereas transcription factor networks have been shown to influence the self-renewal and lineage decisions of human HSCs, the post-transcriptional mechanisms that guide HSC fate have not been closely investigated. Here we show that overexpression of the RNA-binding protein Musashi-2 (MSI2) induces multiple pro-self-renewal phenotypes, including a 17-fold increase in short-term repopulating cells and a net 23-fold ex vivo expansion of long-term repopulating HSCs. By performing a global analysis of MSI2-RNA interactions, we show that MSI2 directly attenuates aryl hydrocarbon receptor (AHR) signalling through post-transcriptional downregulation of canonical AHR pathway components in cord blood HSPCs. Our study gives mechanistic insight into RNA networks controlled by RNA-binding proteins that underlie self-renewal and provides evidence that manipulating such networks ex vivo can enhance the regenerative potential of human HSCs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4880456/" 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/PMC4880456/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rentas, Stefan -- Holzapfel, Nicholas T -- Belew, Muluken S -- Pratt, Gabriel A -- Voisin, Veronique -- Wilhelm, Brian T -- Bader, Gary D -- Yeo, Gene W -- Hope, Kristin J -- HG004659/HG/NHGRI NIH HHS/ -- MOP-126030/Canadian Institutes of Health Research/Canada -- NS075449/NS/NINDS NIH HHS/ -- England -- Nature. 2016 Apr 28;532(7600):508-11. doi: 10.1038/nature17665.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario L8S 4K1, Canada. ; Department of Cellular and Molecular Medicine, Institute for Genomic Medicine, University of California, San Diego, La Jolla, California 92037, USA. ; Bioinformatics Graduate Program, University of California, San Diego, La Jolla, California 92037, USA. ; The Donnelly Centre, University of Toronto, Toronto, Ontario M5S 3E1, Canada. ; Institute for Research in Immunology and Cancer, University of Montreal, Montreal, Quebec H3C 3J7, Canada. ; Department of Physiology, National University of Singapore and Molecular Engineering Laboratory, A*STAR, Singapore 138632, Singapore.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27121842" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Basic Helix-Loop-Helix Transcription Factors/genetics/*metabolism ; Cell Count ; *Cell Self Renewal/genetics ; Down-Regulation/genetics ; Female ; Fetal Blood/cytology ; Gene Knockdown Techniques ; Hematopoietic Stem Cells/*cytology/*metabolism ; Humans ; Male ; Mice ; Protein Binding ; RNA, Messenger/genetics/metabolism ; RNA-Binding Proteins/genetics/*metabolism ; Receptors, Aryl Hydrocarbon/genetics/*metabolism ; *Signal Transduction/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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