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  • Articles  (14)
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  • American Association for the Advancement of Science (AAAS)  (14)
  • American Chemical Society
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  • 1
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    Evidence for a common mechanism of SIRT1 regulation by allosteric activators (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-03-09
    Description: A molecule that treats multiple age-related diseases would have a major impact on global health and economics. The SIRT1 deacetylase has drawn attention in this regard as a target for drug design. Yet controversy exists around the mechanism of sirtuin-activating compounds (STACs). We found that specific hydrophobic motifs found in SIRT1 substrates such as PGC-1alpha and FOXO3a facilitate SIRT1 activation by STACs. A single amino acid in SIRT1, Glu(230), located in a structured N-terminal domain, was critical for activation by all previously reported STAC scaffolds and a new class of chemically distinct activators. In primary cells reconstituted with activation-defective SIRT1, the metabolic effects of STACs were blocked. Thus, SIRT1 can be directly activated through an allosteric mechanism common to chemically diverse STACs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3799917/" 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/PMC3799917/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hubbard, Basil P -- Gomes, Ana P -- Dai, Han -- Li, Jun -- Case, April W -- Considine, Thomas -- Riera, Thomas V -- Lee, Jessica E -- E, Sook Yen -- Lamming, Dudley W -- Pentelute, Bradley L -- Schuman, Eli R -- Stevens, Linda A -- Ling, Alvin J Y -- Armour, Sean M -- Michan, Shaday -- Zhao, Huizhen -- Jiang, Yong -- Sweitzer, Sharon M -- Blum, Charles A -- Disch, Jeremy S -- Ng, Pui Yee -- Howitz, Konrad T -- Rolo, Anabela P -- Hamuro, Yoshitomo -- Moss, Joel -- Perni, Robert B -- Ellis, James L -- Vlasuk, George P -- Sinclair, David A -- P01 AG027916/AG/NIA NIH HHS/ -- R01 AG019719/AG/NIA NIH HHS/ -- R01 AG028730/AG/NIA NIH HHS/ -- R37 AG028730/AG/NIA NIH HHS/ -- ZIA HL000659-20/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2013 Mar 8;339(6124):1216-9. doi: 10.1126/science.1231097.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23471411" target="_blank"〉PubMed〈/a〉
    Keywords: Allosteric Regulation ; Amino Acid Motifs ; Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Cells, Cultured ; Enzyme Activation ; Forkhead Transcription Factors/chemistry/genetics ; Glutamic Acid/chemistry/genetics ; Heterocyclic Compounds with 4 or More Rings/chemistry/pharmacology ; Humans ; Hydrophobic and Hydrophilic Interactions ; Mice ; Molecular Sequence Data ; Myoblasts/drug effects/enzymology ; Protein Structure, Tertiary ; Sirtuin 1/*chemistry/genetics/*metabolism ; Stilbenes/chemistry/*pharmacology ; Substrate Specificity
    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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  • 2
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    Hepatitis C virus E2 envelope glycoprotein core structure (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-11-30
    Description: Hepatitis C virus (HCV), a Hepacivirus, is a major cause of viral hepatitis, liver cirrhosis, and hepatocellular carcinoma. HCV envelope glycoproteins E1 and E2 mediate fusion and entry into host cells and are the primary targets of the humoral immune response. The crystal structure of the E2 core bound to broadly neutralizing antibody AR3C at 2.65 angstroms reveals a compact architecture composed of a central immunoglobulin-fold beta sandwich flanked by two additional protein layers. The CD81 receptor binding site was identified by electron microscopy and site-directed mutagenesis and overlaps with the AR3C epitope. The x-ray and electron microscopy E2 structures differ markedly from predictions of an extended, three-domain, class II fusion protein fold and therefore provide valuable information for HCV drug and vaccine design.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3954638/" 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/PMC3954638/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kong, Leopold -- Giang, Erick -- Nieusma, Travis -- Kadam, Rameshwar U -- Cogburn, Kristin E -- Hua, Yuanzi -- Dai, Xiaoping -- Stanfield, Robyn L -- Burton, Dennis R -- Ward, Andrew B -- Wilson, Ian A -- Law, Mansun -- AI071084/AI/NIAID NIH HHS/ -- AI079031/AI/NIAID NIH HHS/ -- AI080916/AI/NIAID NIH HHS/ -- AI084817/AI/NIAID NIH HHS/ -- P41 GM103310/GM/NIGMS NIH HHS/ -- P41RR001209/RR/NCRR NIH HHS/ -- R01 AI071084/AI/NIAID NIH HHS/ -- R01 AI079031/AI/NIAID NIH HHS/ -- R01 AI084817/AI/NIAID NIH HHS/ -- R21 AI080916/AI/NIAID NIH HHS/ -- RR017573/RR/NCRR NIH HHS/ -- U54 GM094586/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2013 Nov 29;342(6162):1090-4. doi: 10.1126/science.1243876.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24288331" target="_blank"〉PubMed〈/a〉
    Keywords: Antibodies, Neutralizing/chemistry ; Antigens, CD81/chemistry ; Antiviral Agents/chemistry ; Binding Sites ; Crystallography, X-Ray ; Drug Design ; Epitopes/chemistry/genetics ; Humans ; Immunoglobulin Fab Fragments/chemistry ; Mutagenesis, Site-Directed ; Protein Folding ; Protein Structure, Tertiary ; Viral Envelope Proteins/*chemistry/immunology ; Viral Hepatitis Vaccines/chemistry/immunology
    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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  • 3
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    Unraveling the mechanism of protein disaggregation through a ClpB-DnaK interaction (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-02-09
    Description: HSP-100 protein machines, such as ClpB, play an essential role in reactivating protein aggregates that can otherwise be lethal to cells. Although the players involved are known, including the DnaK/DnaJ/GrpE chaperone system in bacteria, details of the molecular interactions are not well understood. Using methyl-transverse relaxation-optimized nuclear magnetic resonance spectroscopy, we present an atomic-resolution model for the ClpB-DnaK complex, which we verified by mutagenesis and functional assays. ClpB and GrpE compete for binding to the DnaK nucleotide binding domain, with GrpE binding inhibiting disaggregation. DnaK, in turn, plays a dual role in both disaggregation and subsequent refolding of polypeptide chains as they emerge from the aggregate. On the basis of a combined structural-biochemical analysis, we propose a model for the mechanism of protein aggregate reactivation by ClpB.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rosenzweig, Rina -- Moradi, Shoeib -- Zarrine-Afsar, Arash -- Glover, John R -- Kay, Lewis E -- Canadian Institutes of Health Research/Canada -- New York, N.Y. -- Science. 2013 Mar 1;339(6123):1080-3. doi: 10.1126/science.1233066. Epub 2013 Feb 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada. rina.rosenzweig@utoronto.ca〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23393091" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/*chemistry/genetics ; Adenosine Triphosphate/chemistry/metabolism ; Bacterial Proteins/chemistry ; Heat-Shock Proteins/*chemistry/genetics ; Hydrolysis ; *Models, Chemical ; Mutation ; Nuclear Magnetic Resonance, Biomolecular ; Protein Interaction Domains and Motifs ; Protein Interaction Maps ; Protein Multimerization ; *Protein Refolding ; Protein Structure, Tertiary ; Protein Transport ; Thermus thermophilus
    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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  • 4
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    Geometric catalysis of membrane fission driven by flexible dynamin rings (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-03-23
    Description: Biological membrane fission requires protein-driven stress. The guanosine triphosphatase (GTPase) dynamin builds up membrane stress by polymerizing into a helical collar that constricts the neck of budding vesicles. How this curvature stress mediates nonleaky membrane remodeling is actively debated. Using lipid nanotubes as substrates to directly measure geometric intermediates of the fission pathway, we found that GTP hydrolysis limits dynamin polymerization into short, metastable collars that are optimal for fission. Collars as short as two rungs translated radial constriction to reversible hemifission via membrane wedging of the pleckstrin homology domains (PHDs) of dynamin. Modeling revealed that tilting of the PHDs to conform with membrane deformations creates the low-energy pathway for hemifission. This local coordination of dynamin and lipids suggests how membranes can be remodeled in cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3980720/" 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/PMC3980720/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shnyrova, Anna V -- Bashkirov, Pavel V -- Akimov, Sergey A -- Pucadyil, Thomas J -- Zimmerberg, Joshua -- Schmid, Sandra L -- Frolov, Vadim A -- GM42455/GM/NIGMS NIH HHS/ -- R01 GM042455/GM/NIGMS NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2013 Mar 22;339(6126):1433-6. doi: 10.1126/science.1233920.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, University of the Basque Country, Leioa, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23520112" target="_blank"〉PubMed〈/a〉
    Keywords: Biocatalysis ; Dynamin I/*chemistry/*metabolism ; Guanosine Triphosphate/metabolism ; Hydrolysis ; Lipid Bilayers/chemistry/*metabolism ; Models, Biological ; Nanotubes ; Protein Conformation ; Protein Multimerization ; Protein Structure, Tertiary ; Thermodynamics
    Print ISSN: 0036-8075
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  • 5
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    Crystal structure of Na+, K(+)-ATPase in the Na(+)-bound state (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-09-21
    Description: The Na(+), K(+)-adenosine triphosphatase (ATPase) maintains the electrochemical gradients of Na(+) and K(+) across the plasma membrane--a prerequisite for electrical excitability and secondary transport. Hitherto, structural information has been limited to K(+)-bound or ouabain-blocked forms. We present the crystal structure of a Na(+)-bound Na(+), K(+)-ATPase as determined at 4.3 A resolution. Compared with the K(+)-bound form, large conformational changes are observed in the alpha subunit whereas the beta and gamma subunit structures are maintained. The locations of the three Na(+) sites are indicated with the unique site III at the recently suggested IIIb, as further supported by electrophysiological studies on leak currents. Extracellular release of the third Na(+) from IIIb through IIIa, followed by exchange of Na(+) for K(+) at sites I and II, is suggested.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nyblom, Maria -- Poulsen, Hanne -- Gourdon, Pontus -- Reinhard, Linda -- Andersson, Magnus -- Lindahl, Erik -- Fedosova, Natalya -- Nissen, Poul -- New York, N.Y. -- Science. 2013 Oct 4;342(6154):123-7. doi: 10.1126/science.1243352. Epub 2013 Sep 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Membrane Pumps in Cells and Disease-PUMPkin, Danish National Research Foundation, DK-8000 Aarhus, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24051246" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/enzymology ; Crystallography, X-Ray ; *Models, Molecular ; Mutation ; Protein Binding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Sodium/*chemistry ; Sodium-Potassium-Exchanging ATPase/*chemistry/genetics ; Swine
    Print ISSN: 0036-8075
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  • 6
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    Expanding the fluorine chemistry of living systems using engineered polyketide synthase pathways (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-09-07
    Description: Organofluorines represent a rapidly expanding proportion of molecules that are used in pharmaceuticals, diagnostics, agrochemicals, and materials. Despite the prevalence of fluorine in synthetic compounds, the known biological scope is limited to a single pathway that produces fluoroacetate. Here, we demonstrate that this pathway can be exploited as a source of fluorinated building blocks for introduction of fluorine into natural-product scaffolds. Specifically, we have constructed pathways involving two polyketide synthase systems, and we show that fluoroacetate can be used to incorporate fluorine into the polyketide backbone in vitro. We further show that fluorine can be inserted site-selectively and introduced into polyketide products in vivo. These results highlight the prospects for the production of complex fluorinated natural products using synthetic biology.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4057101/" 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/PMC4057101/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walker, Mark C -- Thuronyi, Benjamin W -- Charkoudian, Louise K -- Lowry, Brian -- Khosla, Chaitan -- Chang, Michelle C Y -- 1 DP2 OD008696/OD/NIH HHS/ -- 1 T32 GMO66698/PHS HHS/ -- 1S10RR023679-01/RR/NCRR NIH HHS/ -- F32 CA137994/CA/NCI NIH HHS/ -- R01 GM087934/GM/NIGMS NIH HHS/ -- S10 RR16634-01/RR/NCRR NIH HHS/ -- T32 GM066698/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2013 Sep 6;341(6150):1089-94. doi: 10.1126/science.1242345.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720-1460, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24009388" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/chemistry/genetics/metabolism ; Base Sequence ; Biological Products/chemistry/*metabolism ; Burkholderia/enzymology ; Coenzyme A Ligases/chemistry/genetics/metabolism ; Escherichia coli ; Fluoroacetates/chemistry/*metabolism ; Metabolic Networks and Pathways ; Molecular Sequence Data ; Polyketide Synthases/chemistry/genetics/*metabolism ; Polyketides/chemistry/*metabolism ; Protein Engineering ; Protein Structure, Tertiary ; Streptomyces coelicolor/enzymology
    Print ISSN: 0036-8075
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  • 7
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    Probing allostery through DNA (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-02-16
    Description: Allostery is well documented for proteins but less recognized for DNA-protein interactions. Here, we report that specific binding of a protein on DNA is substantially stabilized or destabilized by another protein bound nearby. The ternary complex's free energy oscillates as a function of the separation between the two proteins with a periodicity of ~10 base pairs, the helical pitch of B-form DNA, and a decay length of ~15 base pairs. The binding affinity of a protein near a DNA hairpin is similarly dependent on their separation, which-together with molecular dynamics simulations-suggests that deformation of the double-helical structure is the origin of DNA allostery. The physiological relevance of this phenomenon is illustrated by its effect on gene expression in live bacteria and on a transcription factor's affinity near nucleosomes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3586787/" 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/PMC3586787/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Sangjin -- Brostromer, Erik -- Xing, Dong -- Jin, Jianshi -- Chong, Shasha -- Ge, Hao -- Wang, Siyuan -- Gu, Chan -- Yang, Lijiang -- Gao, Yi Qin -- Su, Xiao-dong -- Sun, Yujie -- Xie, X Sunney -- DP1 OD000277/OD/NIH HHS/ -- New York, N.Y. -- Science. 2013 Feb 15;339(6121):816-9. doi: 10.1126/science.1229223.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23413354" target="_blank"〉PubMed〈/a〉
    Keywords: *Allosteric Regulation ; Base Sequence ; Binding Sites ; DNA, B-Form/*chemistry ; DNA-Binding Proteins/*chemistry ; DNA-Directed RNA Polymerases/chemistry ; Escherichia coli/genetics/metabolism ; Gene Expression ; *Gene Expression Regulation, Bacterial ; Lac Repressors/chemistry ; Molecular Dynamics Simulation ; Nucleosomes/chemistry ; Protein Binding ; Protein Structure, Tertiary ; Receptors, Glucocorticoid/chemistry ; Transcription Factors/*chemistry ; Viral Proteins/chemistry
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Structure-based design of a fusion glycoprotein vaccine for respiratory syncytial virus (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-11-02
    Description: Respiratory syncytial virus (RSV) is the leading cause of hospitalization for children under 5 years of age. We sought to engineer a viral antigen that provides greater protection than currently available vaccines and focused on antigenic site O, a metastable site specific to the prefusion state of the RSV fusion (F) glycoprotein, as this site is targeted by extremely potent RSV-neutralizing antibodies. Structure-based design yielded stabilized versions of RSV F that maintained antigenic site O when exposed to extremes of pH, osmolality, and temperature. Six RSV F crystal structures provided atomic-level data on how introduced cysteine residues and filled hydrophobic cavities improved stability. Immunization with site O-stabilized variants of RSV F in mice and macaques elicited levels of RSV-specific neutralizing activity many times the protective threshold.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4461862/" 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/PMC4461862/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McLellan, Jason S -- Chen, Man -- Joyce, M Gordon -- Sastry, Mallika -- Stewart-Jones, Guillaume B E -- Yang, Yongping -- Zhang, Baoshan -- Chen, Lei -- Srivatsan, Sanjay -- Zheng, Anqi -- Zhou, Tongqing -- Graepel, Kevin W -- Kumar, Azad -- Moin, Syed -- Boyington, Jeffrey C -- Chuang, Gwo-Yu -- Soto, Cinque -- Baxa, Ulrich -- Bakker, Arjen Q -- Spits, Hergen -- Beaumont, Tim -- Zheng, Zizheng -- Xia, Ningshao -- Ko, Sung-Youl -- Todd, John-Paul -- Rao, Srinivas -- Graham, Barney S -- Kwong, Peter D -- ZIA AI005024-11/Intramural NIH HHS/ -- ZIA AI005061-10/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2013 Nov 1;342(6158):592-8. doi: 10.1126/science.1243283.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24179220" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Neutralizing/immunology ; Antigens, Viral/*chemistry/genetics/immunology ; Crystallography, X-Ray ; Cysteine/chemistry/genetics ; Glycoproteins/*chemistry/genetics/immunology ; Humans ; Macaca ; Mice ; Protein Engineering ; Protein Multimerization ; Protein Stability ; Protein Structure, Tertiary ; Respiratory Syncytial Virus Infections/*prevention & control ; Respiratory Syncytial Virus Vaccines/*chemistry ; Vaccination ; Viral Fusion Proteins/*chemistry/genetics/immunology
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Molecular basis of tubulin transport within the cilium by IFT74 and IFT81 (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-08-31
    Description: Intraflagellar transport (IFT) of ciliary precursors such as tubulin from the cytoplasm to the ciliary tip is involved in the construction of the cilium, a hairlike organelle found on most eukaryotic cells. However, the molecular mechanisms of IFT are poorly understood. Here, we found that the two core IFT proteins IFT74 and IFT81 form a tubulin-binding module and mapped the interaction to a calponin homology domain of IFT81 and a highly basic domain in IFT74. Knockdown of IFT81 and rescue experiments with point mutants showed that tubulin binding by IFT81 was required for ciliogenesis in human cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4359902/" 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/PMC4359902/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bhogaraju, Sagar -- Cajanek, Lukas -- Fort, Cecile -- Blisnick, Thierry -- Weber, Kristina -- Taschner, Michael -- Mizuno, Naoko -- Lamla, Stefan -- Bastin, Philippe -- Nigg, Erich A -- Lorentzen, Esben -- New York, N.Y. -- Science. 2013 Aug 30;341(6149):1009-12. doi: 10.1126/science.1240985.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Structural Cell Biology, Max Planck Institute of Biochemistry, Martinsried, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23990561" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line, Tumor ; Chlamydomonas reinhardtii/genetics/metabolism ; Cilia/genetics/*physiology ; Crystallography, X-Ray ; Cytoskeletal Proteins/chemistry/genetics/*metabolism ; Gene Knockdown Techniques ; Humans ; Muscle Proteins/chemistry/genetics/*metabolism ; Plant Proteins/chemistry/genetics/metabolism ; Point Mutation ; Protein Structure, Tertiary ; Protein Transport ; RNA, Small Interfering/genetics ; Tubulin/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Structural basis for flg22-induced activation of the Arabidopsis FLS2-BAK1 immune complex (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-10-12
    Description: Flagellin perception in Arabidopsis is through recognition of its highly conserved N-terminal epitope (flg22) by flagellin-sensitive 2 (FLS2). Flg22 binding induces FLS2 heteromerization with BRASSINOSTEROID INSENSITIVE 1-associated kinase 1 (BAK1) and their reciprocal activation followed by plant immunity. Here, we report the crystal structure of FLS2 and BAK1 ectodomains complexed with flg22 at 3.06 angstroms. A conserved and a nonconserved site from the inner surface of the FLS2 solenoid recognize the C- and N-terminal segment of flg22, respectively, without oligomerization or conformational changes in the FLS2 ectodomain. Besides directly interacting with FLS2, BAK1 acts as a co-receptor by recognizing the C terminus of the FLS2-bound flg22. Our data reveal the molecular mechanisms underlying FLS2-BAK1 complex recognition of flg22 and provide insight into the immune receptor complex activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, Yadong -- Li, Lei -- Macho, Alberto P -- Han, Zhifu -- Hu, Zehan -- Zipfel, Cyril -- Zhou, Jian-Min -- Chai, Jijie -- New York, N.Y. -- Science. 2013 Nov 1;342(6158):624-8. doi: 10.1126/science.1243825. Epub 2013 Oct 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉School of Life Sciences, Tsinghua University, Beijing 100084, China, and Tsinghua-Peking Center for Life Sciences, Beijing 100084, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24114786" target="_blank"〉PubMed〈/a〉
    Keywords: Antigen-Antibody Complex/*chemistry ; Arabidopsis/*immunology ; Arabidopsis Proteins/*chemistry ; Crystallography, X-Ray ; Flagellin/*chemistry ; Protein Kinases/*chemistry ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/*chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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