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  • Crystallography, X-Ray
  • American Association for the Advancement of Science (AAAS)  (38)
  • American Geophysical Union (AGU)
  • American Institute of Physics (AIP)
  • 2010-2014  (38)
  • 1995-1999
  • 2010  (38)
Collection
Keywords
Publisher
  • American Association for the Advancement of Science (AAAS)  (38)
  • American Geophysical Union (AGU)
  • American Institute of Physics (AIP)
  • Nature Publishing Group (NPG)  (70)
Years
  • 2010-2014  (38)
  • 1995-1999
Year
  • 1
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    Biochemistry. Some enzymes just need a space of their own (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-01-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kang, Sebyung -- Douglas, Trevor -- New York, N.Y. -- Science. 2010 Jan 1;327(5961):42-3. doi: 10.1126/science.1184318.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry and Center for Bio-Inspired Nanomaterials, Montana State University, Bozeman, MT 59717, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20044564" target="_blank"〉PubMed〈/a〉
    Keywords: Acetaldehyde/metabolism ; *Cell Compartmentation ; Crystallization ; Crystallography, X-Ray ; Cytosol/metabolism ; Escherichia coli/*chemistry/enzymology/*ultrastructure ; Escherichia coli Proteins/*chemistry/metabolism ; Ethanolamine/*metabolism ; Polyproteins/chemistry/metabolism ; Protein Folding ; Protein Structure, Tertiary
    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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    Crystal structure of the eukaryotic ribosome (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: Crystal structures of prokaryotic ribosomes have described in detail the universally conserved core of the translation mechanism. However, many facets of the translation process in eukaryotes are not shared with prokaryotes. The crystal structure of the yeast 80S ribosome determined at 4.15 angstrom resolution reveals the higher complexity of eukaryotic ribosomes, which are 40% larger than their bacterial counterparts. Our model shows how eukaryote-specific elements considerably expand the network of interactions within the ribosome and provides insights into eukaryote-specific features of protein synthesis. Our crystals capture the ribosome in the ratcheted state, which is essential for translocation of mRNA and transfer RNA (tRNA), and in which the small ribosomal subunit has rotated with respect to the large subunit. We describe the conformational changes in both ribosomal subunits that are involved in ratcheting and their implications in coordination between the two associated subunits and in mRNA and tRNA translocation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ben-Shem, Adam -- Jenner, Lasse -- Yusupova, Gulnara -- Yusupov, Marat -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1203-9. doi: 10.1126/science.1194294.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉IGBMC (Institut de Genetique et de Biologie Moleculaire et Cellulaire), 1 rue Laurent Fries, BP10142, Illkirch F-67400, France. adam@igbmc.fr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109664" target="_blank"〉PubMed〈/a〉
    Keywords: Crystallization ; Crystallography, X-Ray ; Models, Molecular ; Nucleic Acid Conformation ; Peptide Chain Initiation, Translational ; Protein Binding ; *Protein Biosynthesis ; Protein Conformation ; RNA, Fungal/analysis/chemistry/metabolism ; RNA, Messenger/analysis/chemistry/metabolism ; RNA, Ribosomal/analysis/*chemistry/metabolism ; RNA, Transfer/chemistry/metabolism ; Ribosomal Proteins/analysis/*chemistry/metabolism ; Ribosome Subunits, Large, Eukaryotic/chemistry/metabolism/ultrastructure ; Ribosome Subunits, Small, Eukaryotic/chemistry/metabolism/ultrastructure ; Ribosomes/*chemistry/metabolism/*ultrastructure ; Saccharomyces cerevisiae/chemistry/genetics/metabolism/*ultrastructure ; Saccharomyces cerevisiae Proteins/analysis/chemistry/metabolism
    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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    Structural basis for activation of class Ib ribonucleotide reductase (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-07
    Description: The class Ib ribonucleotide reductase of Escherichia coli can initiate reduction of nucleotides to deoxynucleotides with either a Mn(III)2-tyrosyl radical (Y*) or a Fe(III)2-Y* cofactor in the NrdF subunit. Whereas Fe(III)2-Y* can self-assemble from Fe(II)2-NrdF and O2, activation of Mn(II)2-NrdF requires a reduced flavoprotein, NrdI, proposed to form the oxidant for cofactor assembly by reduction of O2. The crystal structures reported here of E. coli Mn(II)2-NrdF and Fe(II)2-NrdF reveal different coordination environments, suggesting distinct initial binding sites for the oxidants during cofactor activation. In the structures of Mn(II)2-NrdF in complex with reduced and oxidized NrdI, a continuous channel connects the NrdI flavin cofactor to the NrdF Mn(II)2 active site. Crystallographic detection of a putative peroxide in this channel supports the proposed mechanism of Mn(III)2-Y* cofactor assembly.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3020666/" 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/PMC3020666/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boal, Amie K -- Cotruvo, Joseph A Jr -- Stubbe, JoAnne -- Rosenzweig, Amy C -- GM58518/GM/NIGMS NIH HHS/ -- GM81393/GM/NIGMS NIH HHS/ -- R01 GM058518/GM/NIGMS NIH HHS/ -- R01 GM058518-13/GM/NIGMS NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1526-30. doi: 10.1126/science.1190187. Epub 2010 Aug 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, IL 60208, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20688982" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Catalytic Domain ; Coenzymes/chemistry/metabolism ; Crystallography, X-Ray ; Enzyme Activation ; Escherichia coli/*enzymology ; Escherichia coli Proteins/*chemistry/*metabolism ; Ferrous Compounds/chemistry/metabolism ; Flavin Mononucleotide/chemistry/metabolism ; Flavodoxin/*chemistry/metabolism ; Hydrogen Bonding ; Ligands ; Manganese/*chemistry/metabolism ; Models, Molecular ; Oxidants/chemistry/metabolism ; Oxidation-Reduction ; Oxygen/chemistry/metabolism ; Peroxides/chemistry/metabolism ; Protein Folding ; Protein Multimerization ; Protein Subunits/chemistry/metabolism ; Ribonucleotide Reductases/*chemistry/*metabolism
    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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    Cryo-EM model of the bullet-shaped vesicular stomatitis virus (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-06
    Description: Vesicular stomatitis virus (VSV) is a bullet-shaped rhabdovirus and a model system of negative-strand RNA viruses. Through direct visualization by means of cryo-electron microscopy, we show that each virion contains two nested, left-handed helices: an outer helix of matrix protein M and an inner helix of nucleoprotein N and RNA. M has a hub domain with four contact sites that link to neighboring M and N subunits, providing rigidity by clamping adjacent turns of the nucleocapsid. Side-by-side interactions between neighboring N subunits are critical for the nucleocapsid to form a bullet shape, and structure-based mutagenesis results support this description. Together, our data suggest a mechanism of VSV assembly in which the nucleocapsid spirals from the tip to become the helical trunk, both subsequently framed and rigidified by the M layer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2892700/" 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/PMC2892700/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ge, Peng -- Tsao, Jun -- Schein, Stan -- Green, Todd J -- Luo, Ming -- Zhou, Z Hong -- AI050066/AI/NIAID NIH HHS/ -- AI069015/AI/NIAID NIH HHS/ -- GM071940/GM/NIGMS NIH HHS/ -- R01 AI050066/AI/NIAID NIH HHS/ -- R01 AI050066-08/AI/NIAID NIH HHS/ -- R01 AI069015/AI/NIAID NIH HHS/ -- R01 GM071940/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Feb 5;327(5966):689-93. doi: 10.1126/science.1181766.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, Immunology, and Molecular Genetics, University of California at Los Angeles (UCLA), Los Angeles, CA 90095-7364, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20133572" target="_blank"〉PubMed〈/a〉
    Keywords: Cryoelectron Microscopy ; Crystallography, X-Ray ; Image Processing, Computer-Assisted ; Lipid Bilayers ; Models, Molecular ; Mutagenesis ; Nucleocapsid Proteins/*chemistry/genetics/ultrastructure ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; RNA, Viral/*chemistry/ultrastructure ; Vesiculovirus/*chemistry/physiology/*ultrastructure ; Viral Matrix Proteins/*chemistry/ultrastructure ; Virion/chemistry/ultrastructure ; Virus Assembly
    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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  • 5
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    How the CCA-adding enzyme selects adenine over cytosine at position 76 of tRNA (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-13
    Description: CCA-adding enzymes [ATP(CTP):tRNA nucleotidyltransferases] add CCA onto the 3' end of transfer RNA (tRNA) precursors without using a nucleic acid template. Although the mechanism by which cytosine (C) is selected at position 75 of tRNA has been established, the mechanism by which adenine (A) is selected at position 76 remains elusive. Here, we report five cocrystal structures of the enzyme complexed with both a tRNA mimic and nucleoside triphosphates under catalytically active conditions. These structures suggest that adenosine 5'-monophosphate is incorporated onto the A76 position of the tRNA via a carboxylate-assisted, one-metal-ion mechanism with aspartate 110 functioning as a general base. The discrimination against incorporation of cytidine 5'-triphosphate (CTP) at position 76 arises from improper placement of the alpha phosphate of the incoming CTP, which results from the interaction of C with arginine 224 and prevents the nucleophilic attack by the 3' hydroxyl group of cytidine75.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3087442/" 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/PMC3087442/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pan, Baocheng -- Xiong, Yong -- Steitz, Thomas A -- GM57510/GM/NIGMS NIH HHS/ -- R01 GM057510/GM/NIGMS NIH HHS/ -- R01 GM057510-13/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Nov 12;330(6006):937-40. doi: 10.1126/science.1194985.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21071662" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/chemistry/*metabolism ; Adenosine Monophosphate/metabolism ; Adenosine Triphosphate/chemistry/metabolism ; Archaeoglobus fulgidus/*enzymology ; Catalytic Domain ; Crystallization ; Crystallography, X-Ray ; Cytidine Triphosphate/metabolism ; Cytosine/chemistry/*metabolism ; Hydrogen Bonding ; Models, Molecular ; Nucleic Acid Conformation ; Protein Conformation ; Protein Structure, Tertiary ; RNA Nucleotidyltransferases/*chemistry/*metabolism ; RNA, Transfer/chemistry/*metabolism
    Print ISSN: 0036-8075
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  • 6
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    Ion-mediated electron transfer in a supramolecular donor-acceptor ensemble (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-11
    Description: Ion binding often mediates electron transfer in biological systems as a cofactor strategy, either as a promoter or as an inhibitor. However, it has rarely, if ever, been exploited for that purpose in synthetic host-guest assemblies. We report here that strong binding of specific anions (chloride, bromide, and methylsulfate but not tetrafluoroborate or hexafluorophosphate) to a tetrathiafulvalene calix[4]pyrrole (TTF-C4P) donor enforces a host conformation that favors electron transfer to a bisimidazolium quinone (BIQ2+) guest acceptor. In contrast, the addition of a tetraethylammonium cation, which binds more effectively than the BIQ2+ guest in the TTF-C4P cavity, leads to back electron transfer, restoring the initial oxidation states of the donor and acceptor pair. The products of these processes were characterized via spectroscopy and x-ray crystallography.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Park, Jung Su -- Karnas, Elizabeth -- Ohkubo, Kei -- Chen, Ping -- Kadish, Karl M -- Fukuzumi, Shunichi -- Bielawski, Christopher W -- Hudnall, Todd W -- Lynch, Vincent M -- Sessler, Jonathan L -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1324-7. doi: 10.1126/science.1192044.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University Station-A5300, University of Texas, Austin, TX 78712-0165, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20829481" target="_blank"〉PubMed〈/a〉
    Keywords: Anions/*chemistry ; Bromides/chemistry ; Calixarenes/*chemistry ; Cations/*chemistry ; Chlorides/chemistry ; Crystallography, X-Ray ; Electron Spin Resonance Spectroscopy ; Electron Transport ; *Electrons ; Imidazoles/*chemistry ; Magnetic Resonance Spectroscopy ; Molecular Conformation ; Oxidation-Reduction ; Quinones/*chemistry ; Sulfuric Acid Esters/chemistry
    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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  • 7
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    Biochemistry. A never-ending story (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sjoberg, Britt-Marie -- New York, N.Y. -- Science. 2010 Sep 17;329(5998):1475-6. doi: 10.1126/science.1196347.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Functional Genomics, Stockholm University, SE-10691 Stockholm, Sweden. britt-marie.sjoberg@molbio.su.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20847256" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/chemistry/metabolism ; Corynebacterium/*enzymology ; Crystallography, X-Ray ; Electron Spin Resonance Spectroscopy ; Enzyme Activation ; Escherichia coli/*enzymology ; Escherichia coli Proteins/*chemistry/metabolism ; Flavin Mononucleotide/chemistry/metabolism ; Flavodoxin/*chemistry/metabolism ; Manganese/chemistry/*metabolism ; Oxidation-Reduction ; Protein Subunits/chemistry/metabolism ; Ribonucleotide Reductases/*chemistry/metabolism
    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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  • 8
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    The structure of cbb3 cytochrome oxidase provides insights into proton pumping (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-06-26
    Description: The heme-copper oxidases (HCOs) accomplish the key event of aerobic respiration; they couple O2 reduction and transmembrane proton pumping. To gain new insights into the still enigmatic process, we structurally characterized a C-family HCO--essential for the pathogenicity of many bacteria--that differs from the two other HCO families, A and B, that have been structurally analyzed. The x-ray structure of the C-family cbb3 oxidase from Pseudomonas stutzeri at 3.2 angstrom resolution shows an electron supply system different from families A and B. Like family-B HCOs, C HCOs have only one pathway, which conducts protons via an alternative tyrosine-histidine cross-link. Structural differences around hemes b and b3 suggest a different redox-driven proton-pumping mechanism and provide clues to explain the higher activity of family-C HCOs at low oxygen concentrations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Buschmann, Sabine -- Warkentin, Eberhard -- Xie, Hao -- Langer, Julian D -- Ermler, Ulrich -- Michel, Hartmut -- New York, N.Y. -- Science. 2010 Jul 16;329(5989):327-30. doi: 10.1126/science.1187303. Epub 2010 Jun 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Biophysik, Max-von-Laue-Strasse 3, D-60438 Frankfurt/Main, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20576851" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Catalytic Domain ; Crystallography, X-Ray ; Cytoplasm/metabolism ; Electron Transport ; Electron Transport Complex IV/*chemistry/*metabolism ; Heme/chemistry ; Histidine/chemistry ; Hydrogen Bonding ; Models, Molecular ; Molecular Sequence Data ; Oxidation-Reduction ; Oxygen/metabolism ; Periplasm/metabolism ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Proton Pumps/*chemistry/*metabolism ; *Protons ; Pseudomonas stutzeri/*enzymology ; Tyrosine/chemistry
    Print ISSN: 0036-8075
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  • 9
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    The mechanism for activation of GTP hydrolysis on the ribosome (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-06
    Description: Protein synthesis requires several guanosine triphosphatase (GTPase) factors, including elongation factor Tu (EF-Tu), which delivers aminoacyl-transfer RNAs (tRNAs) to the ribosome. To understand how the ribosome triggers GTP hydrolysis in translational GTPases, we have determined the crystal structure of EF-Tu and aminoacyl-tRNA bound to the ribosome with a GTP analog, to 3.2 angstrom resolution. EF-Tu is in its active conformation, the switch I loop is ordered, and the catalytic histidine is coordinating the nucleophilic water in position for inline attack on the gamma-phosphate of GTP. This activated conformation is due to a critical and conserved interaction of the histidine with A2662 of the sarcin-ricin loop of the 23S ribosomal RNA. The structure suggests a universal mechanism for GTPase activation and hydrolysis in translational GTPases on the ribosome.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3763471/" 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/PMC3763471/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Voorhees, Rebecca M -- Schmeing, T Martin -- Kelley, Ann C -- Ramakrishnan, V -- 082086/Wellcome Trust/United Kingdom -- MC_U105184332/Medical Research Council/United Kingdom -- Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2010 Nov 5;330(6005):835-8. doi: 10.1126/science.1194460.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉MRC Laboratory of Molecular Biology, Cambridge CB2 0QH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051640" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/chemistry/metabolism ; Catalytic Domain ; Crystallography, X-Ray ; Enzyme Activation ; Guanosine Triphosphate/analogs & derivatives/*metabolism ; Hydrolysis ; Hydrophobic and Hydrophilic Interactions ; Nucleic Acid Conformation ; Paromomycin/metabolism ; Peptide Elongation Factor Tu/*chemistry/*metabolism ; Phosphates/metabolism ; Protein Structure, Tertiary ; RNA, Bacterial/chemistry/*metabolism ; RNA, Ribosomal, 23S/chemistry/metabolism ; RNA, Transfer, Amino Acyl/chemistry/*metabolism ; Ribosomes/*metabolism ; Thermus thermophilus/chemistry/*metabolism/ultrastructure
    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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  • 10
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    Vibrio cholerae VpsT regulates matrix production and motility by directly sensing cyclic di-GMP (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-02-13
    Description: Microorganisms can switch from a planktonic, free-swimming life-style to a sessile, colonial state, called a biofilm, which confers resistance to environmental stress. Conversion between the motile and biofilm life-styles has been attributed to increased levels of the prokaryotic second messenger cyclic di-guanosine monophosphate (c-di-GMP), yet the signaling mechanisms mediating such a global switch are poorly understood. Here we show that the transcriptional regulator VpsT from Vibrio cholerae directly senses c-di-GMP to inversely control extracellular matrix production and motility, which identifies VpsT as a master regulator for biofilm formation. Rather than being regulated by phosphorylation, VpsT undergoes a change in oligomerization on c-di-GMP binding.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2828054/" 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/PMC2828054/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Krasteva, Petya V -- Fong, Jiunn C N -- Shikuma, Nicholas J -- Beyhan, Sinem -- Navarro, Marcos V A S -- Yildiz, Fitnat H -- Sondermann, Holger -- 1R01GM081373/GM/NIGMS NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 AI055987/AI/NIAID NIH HHS/ -- R01 AI055987-06A1/AI/NIAID NIH HHS/ -- R01 GM081373/GM/NIGMS NIH HHS/ -- R01 GM081373-03/GM/NIGMS NIH HHS/ -- R01AI055987/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Feb 12;327(5967):866-8. doi: 10.1126/science.1181185.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20150502" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Bacterial Proteins/chemistry/genetics/*metabolism ; Binding Sites ; Biofilms/*growth & development ; Crystallography, X-Ray ; Cyclic GMP/*analogs & derivatives/metabolism ; DNA, Bacterial/metabolism ; Dimerization ; Extracellular Matrix/*metabolism ; Gene Expression Profiling ; Gene Expression Regulation, Bacterial ; Models, Molecular ; Movement ; Point Mutation ; Polysaccharides, Bacterial/genetics/metabolism ; Protein Folding ; Protein Multimerization ; Protein Structure, Tertiary ; Signal Transduction ; Transcription Factors/chemistry/genetics/*metabolism ; Transcription, Genetic ; Vibrio cholerae O1/cytology/genetics/*physiology
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  • 11
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    Molecular basis of alternating access membrane transport by the sodium-hydantoin transporter Mhp1 (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-04-24
    Description: The structure of the sodium-benzylhydantoin transport protein Mhp1 from Microbacterium liquefaciens comprises a five-helix inverted repeat, which is widespread among secondary transporters. Here, we report the crystal structure of an inward-facing conformation of Mhp1 at 3.8 angstroms resolution, complementing its previously described structures in outward-facing and occluded states. From analyses of the three structures and molecular dynamics simulations, we propose a mechanism for the transport cycle in Mhp1. Switching from the outward- to the inward-facing state, to effect the inward release of sodium and benzylhydantoin, is primarily achieved by a rigid body movement of transmembrane helices 3, 4, 8, and 9 relative to the rest of the protein. This forms the basis of an alternating access mechanism applicable to many transporters of this emerging superfamily.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2885435/" 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/PMC2885435/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shimamura, Tatsuro -- Weyand, Simone -- Beckstein, Oliver -- Rutherford, Nicholas G -- Hadden, Jonathan M -- Sharples, David -- Sansom, Mark S P -- Iwata, So -- Henderson, Peter J F -- Cameron, Alexander D -- 062164/Z/00/Z/Wellcome Trust/United Kingdom -- 079209/Wellcome Trust/United Kingdom -- BB/C51725/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/G020043/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BB/G023425/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- BBS/B/14418/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2010 Apr 23;328(5977):470-3. doi: 10.1126/science.1186303.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Molecular Biosciences, Membrane Protein Crystallography Group, Imperial College, London SW7 2AZ, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20413494" target="_blank"〉PubMed〈/a〉
    Keywords: Actinomycetales/*chemistry/metabolism ; Amino Acid Motifs ; Bacterial Proteins/chemistry/metabolism ; Binding Sites ; Biological Transport ; Crystallography, X-Ray ; Hydantoins/chemistry/*metabolism ; Ion Transport ; Membrane Transport Proteins/*chemistry/*metabolism ; Models, Molecular ; Molecular Dynamics Simulation ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Sodium/*metabolism
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  • 12
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    Computational design of an enzyme catalyst for a stereoselective bimolecular Diels-Alder reaction (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-22
    Description: The Diels-Alder reaction is a cornerstone in organic synthesis, forming two carbon-carbon bonds and up to four new stereogenic centers in one step. No naturally occurring enzymes have been shown to catalyze bimolecular Diels-Alder reactions. We describe the de novo computational design and experimental characterization of enzymes catalyzing a bimolecular Diels-Alder reaction with high stereoselectivity and substrate specificity. X-ray crystallography confirms that the structure matches the design for the most active of the enzymes, and binding site substitutions reprogram the substrate specificity. Designed stereoselective catalysts for carbon-carbon bond-forming reactions should be broadly useful in synthetic chemistry.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3241958/" 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/PMC3241958/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Siegel, Justin B -- Zanghellini, Alexandre -- Lovick, Helena M -- Kiss, Gert -- Lambert, Abigail R -- St Clair, Jennifer L -- Gallaher, Jasmine L -- Hilvert, Donald -- Gelb, Michael H -- Stoddard, Barry L -- Houk, Kendall N -- Michael, Forrest E -- Baker, David -- R01 GM075962/GM/NIGMS NIH HHS/ -- T32 GM008268/GM/NIGMS NIH HHS/ -- T32 GM008268-24/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Jul 16;329(5989):309-13. doi: 10.1126/science.1190239.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20647463" target="_blank"〉PubMed〈/a〉
    Keywords: Acrylamides/chemistry ; Algorithms ; Butadienes/chemistry ; Carbon/*chemistry ; Catalysis ; Catalytic Domain ; Computer Simulation ; *Computer-Aided Design ; Crystallography, X-Ray ; Enzymes/*chemistry/genetics ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Kinetics ; Models, Molecular ; Mutagenesis ; Physicochemical Processes ; Protein Conformation ; *Protein Engineering ; Proteins/*chemistry/genetics ; Software ; Stereoisomerism ; Substrate Specificity
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  • 13
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    Multiple functional groups of varying ratios in metal-organic frameworks (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-02-13
    Description: We show that metal-organic frameworks (MOFs) can incorporate a large number of different functionalities on linking groups in a way that mixes the linker, rather than forming separate domains. We made complex MOFs from 1,4-benzenedicarboxylate (denoted by "A" in this work) and its derivatives -NH2, -Br, -(Cl)2, -NO2, -(CH3)2, -C4H4, -(OC3H5)2, and -(OC7H7)2 (denoted by "B" to "I," respectively) to synthesize 18 multivariate (MTV) MOF-5 type structures that contain up to eight distinct functionalities in one phase. The backbone (zinc oxide and phenylene units) of these structures is ordered, but the distribution of functional groups is disordered. The complex arrangements of several functional groups within the pores can lead to properties that are not simply linear sums of those of the pure components. For example, a member of this series, MTV-MOF-5-EHI, exhibits up to 400% better selectivity for carbon dioxide over carbon monoxide compared with its best same-link counterparts.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deng, Hexiang -- Doonan, Christian J -- Furukawa, Hiroyasu -- Ferreira, Ricardo B -- Towne, John -- Knobler, Carolyn B -- Wang, Bo -- Yaghi, Omar M -- New York, N.Y. -- Science. 2010 Feb 12;327(5967):846-50. doi: 10.1126/science.1181761.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉California Nanosystems Institute, University of California-Los Angeles (UCLA)-Department of Energy (DOE) Institute of Genomics and Proteomics, Department of Chemistry and Biochemistry, UCLA, 607 Charles E. Young Drive East, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20150497" target="_blank"〉PubMed〈/a〉
    Keywords: Carbon Dioxide/chemistry ; Carbon Monoxide/chemistry ; Chemical Phenomena ; Crystallization ; Crystallography, X-Ray ; Magnetic Resonance Spectroscopy ; Metals/*chemistry ; Models, Chemical ; Models, Molecular ; Molecular Structure ; Phthalic Acids/*chemistry ; Zinc Oxide/*chemistry
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    Virology. Looking inside adenovirus (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harrison, Stephen C -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1026-7. doi: 10.1126/science.1194922.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Jack and Eileen Connors Laboratory of Structural Biology, Harvard Medical School, 250 Longwood Avenue, Boston, MA 02115, USA. harrison@crystal.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798308" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviruses, Human/*chemistry/*ultrastructure ; Capsid Proteins/*chemistry/ultrastructure ; Cryoelectron Microscopy ; Crystallography, X-Ray ; Image Processing, Computer-Assisted ; Protein Structure, Tertiary ; Virion/chemistry/ultrastructure
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  • 15
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    Sequence- and structure-specific RNA processing by a CRISPR endonuclease (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-11
    Description: Many bacteria and archaea contain clustered regularly interspaced short palindromic repeats (CRISPRs) that confer resistance to invasive genetic elements. Central to this immune system is the production of CRISPR-derived RNAs (crRNAs) after transcription of the CRISPR locus. Here, we identify the endoribonuclease (Csy4) responsible for CRISPR transcript (pre-crRNA) processing in Pseudomonas aeruginosa. A 1.8 angstrom crystal structure of Csy4 bound to its cognate RNA reveals that Csy4 makes sequence-specific interactions in the major groove of the crRNA repeat stem-loop. Together with electrostatic contacts to the phosphate backbone, these enable Csy4 to bind selectively and cleave pre-crRNAs using phylogenetically conserved serine and histidine residues in the active site. The RNA recognition mechanism identified here explains sequence- and structure-specific processing by a large family of CRISPR-specific endoribonucleases.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3133607/" 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/PMC3133607/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haurwitz, Rachel E -- Jinek, Martin -- Wiedenheft, Blake -- Zhou, Kaihong -- Doudna, Jennifer A -- 5 T32 GM08295/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Sep 10;329(5997):1355-8. doi: 10.1126/science.1192272.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20829488" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Substitution ; Bacterial Proteins/*chemistry/*metabolism ; Base Pairing ; Base Sequence ; CRISPR-Associated Proteins ; Crystallization ; Crystallography, X-Ray ; Endoribonucleases/*chemistry/*metabolism ; Genes, Bacterial ; Hydrogen Bonding ; Models, Molecular ; Nucleic Acid Conformation ; Protein Conformation ; Protein Structure, Tertiary ; Pseudomonas aeruginosa/*enzymology/*genetics ; *RNA Processing, Post-Transcriptional ; RNA, Bacterial/chemistry/genetics/*metabolism ; *Repetitive Sequences, Nucleic Acid ; Static Electricity
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  • 16
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    Poly(A) tail recognition by a viral RNA element through assembly of a triple helix (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: Kaposi's sarcoma-associated herpesvirus produces a highly abundant, nuclear noncoding RNA, polyadenylated nuclear (PAN) RNA, which contains an element that prevents its decay. The 79-nucleotide expression and nuclear retention element (ENE) was proposed to adopt a secondary structure like that of a box H/ACA small nucleolar RNA (snoRNA), with a U-rich internal loop that hybridizes to and protects the PAN RNA poly(A) tail. The crystal structure of a complex between the 40-nucleotide ENE core and oligo(A)(9) RNA at 2.5 angstrom resolution reveals that unlike snoRNAs, the U-rich loop of the ENE engages its target through formation of a major-groove triple helix. A-minor interactions extend the binding interface. Deadenylation assays confirm the functional importance of the triple helix. Thus, the ENE acts as an intramolecular RNA clamp, sequestering the PAN poly(A) tail and preventing the initiation of RNA decay.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074936/" 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/PMC3074936/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mitton-Fry, Rachel M -- DeGregorio, Suzanne J -- Wang, Jimin -- Steitz, Thomas A -- Steitz, Joan A -- CA16038/CA/NCI NIH HHS/ -- GM022778/GM/NIGMS NIH HHS/ -- P01 CA016038/CA/NCI NIH HHS/ -- P01 CA016038-38/CA/NCI NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 GM026154/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Nov 26;330(6008):1244-7. doi: 10.1126/science.1195858.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biophysics and Biochemistry (MB&B), Howard Hughes Medical Institute (HHMI), Yale University School of Medicine, Boyer Center for Molecular Medicine, 295 Congress Avenue, New Haven, CT 06536-9812, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109672" target="_blank"〉PubMed〈/a〉
    Keywords: Base Pairing ; Cell Nucleus/genetics/metabolism ; Crystallography, X-Ray ; Herpesvirus 8, Human/*genetics ; Mutation ; *Nucleic Acid Conformation ; Poly A/chemistry/*metabolism ; *RNA Stability ; RNA, Messenger/chemistry/genetics/metabolism ; RNA, Nuclear/*chemistry/metabolism ; RNA, Untranslated/*chemistry/genetics/metabolism ; RNA, Viral/*chemistry/genetics/metabolism ; *Regulatory Sequences, Ribonucleic Acid ; Riboswitch
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  • 17
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    Functional modules and structural basis of conformational coupling in mitochondrial complex I (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-03
    Description: Proton-pumping respiratory complex I is one of the largest and most complicated membrane protein complexes. Its function is critical for efficient energy supply in aerobic cells, and malfunctions are implicated in many neurodegenerative disorders. Here, we report an x-ray crystallographic analysis of mitochondrial complex I. The positions of all iron-sulfur clusters relative to the membrane arm were determined in the complete enzyme complex. The ubiquinone reduction site resides close to 30 angstroms above the membrane domain. The arrangement of functional modules suggests conformational coupling of redox chemistry with proton pumping and essentially excludes direct mechanisms. We suggest that a approximately 60-angstrom-long helical transmission element is critical for transducing conformational energy to proton-pumping elements in the distal module of the membrane arm.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hunte, Carola -- Zickermann, Volker -- Brandt, Ulrich -- New York, N.Y. -- Science. 2010 Jul 23;329(5990):448-51. doi: 10.1126/science.1191046. Epub 2010 Jul 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Biochemistry and Molecular Biology, Centre for Biological Signalling Studies (BIOSS), University of Freiburg, D-79104 Freiburg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20595580" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Crystallography, X-Ray ; Electron Transport Complex I/*chemistry/*metabolism ; Fungal Proteins/chemistry/metabolism ; Iron/chemistry ; Mitochondria/enzymology ; Mitochondrial Proteins/*chemistry/*metabolism ; Models, Molecular ; Molecular Sequence Data ; Oxidation-Reduction ; Protein Conformation ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Protons ; Sulfur/chemistry ; Ubiquinone/chemistry/metabolism ; Yarrowia/*enzymology
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  • 18
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    Crystal structure of human adenovirus at 3.5 A resolution (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-28
    Description: Rational development of adenovirus vectors for therapeutic gene transfer is hampered by the lack of accurate structural information. Here, we report the x-ray structure at 3.5 angstrom resolution of the 150-megadalton adenovirus capsid containing nearly 1 million amino acids. We describe interactions between the major capsid protein (hexon) and several accessory molecules that stabilize the capsid. The virus structure also reveals an altered association between the penton base and the trimeric fiber protein, perhaps reflecting an early event in cell entry. The high-resolution structure provides a substantial advance toward understanding the assembly and cell entry mechanisms of a large double-stranded DNA virus and provides new opportunities for improving adenovirus-mediated gene transfer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2929978/" 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/PMC2929978/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reddy, Vijay S -- Natchiar, S Kundhavai -- Stewart, Phoebe L -- Nemerow, Glen R -- AI042929/AI/NIAID NIH HHS/ -- EY011431/EY/NEI NIH HHS/ -- HL054352/HL/NHLBI NIH HHS/ -- R01 AI070771/AI/NIAID NIH HHS/ -- R01 AI070771-03/AI/NIAID NIH HHS/ -- R01 EY011431/EY/NEI NIH HHS/ -- R01 EY011431-13/EY/NEI NIH HHS/ -- R01 HL054352/HL/NHLBI NIH HHS/ -- R01 HL054352-17/HL/NHLBI NIH HHS/ -- R29 AI042929/AI/NIAID NIH HHS/ -- R29 AI042929-06/AI/NIAID NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Aug 27;329(5995):1071-5. doi: 10.1126/science.1187292.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA. reddyv@scripps.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798318" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviruses, Human/*chemistry/physiology/*ultrastructure ; Capsid/*chemistry/*ultrastructure ; Capsid Proteins/*chemistry/ultrastructure ; Crystallography, X-Ray ; Genetic Vectors ; Hydrogen Bonding ; Models, Molecular ; Protein Conformation ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Virus Internalization
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    Structural basis of preexisting immunity to the 2009 H1N1 pandemic influenza virus (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-27
    Description: The 2009 H1N1 swine flu is the first influenza pandemic in decades. The crystal structure of the hemagglutinin from the A/California/04/2009 H1N1 virus shows that its antigenic structure, particularly within the Sa antigenic site, is extremely similar to those of human H1N1 viruses circulating early in the 20th century. The cocrystal structure of the 1918 hemagglutinin with 2D1, an antibody from a survivor of the 1918 Spanish flu that neutralizes both 1918 and 2009 H1N1 viruses, reveals an epitope that is conserved in both pandemic viruses. Thus, antigenic similarity between the 2009 and 1918-like viruses provides an explanation for the age-related immunity to the current influenza pandemic.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2897825/" 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/PMC2897825/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xu, Rui -- Ekiert, Damian C -- Krause, Jens C -- Hai, Rong -- Crowe, James E Jr -- Wilson, Ian A -- AI057157/AI/NIAID NIH HHS/ -- AI058113/AI/NIAID NIH HHS/ -- GM080209/GM/NIGMS NIH HHS/ -- P01 AI058113/AI/NIAID NIH HHS/ -- P01 AI058113-050002/AI/NIAID NIH HHS/ -- T32 GM080209/GM/NIGMS NIH HHS/ -- T32 GM080209-01A2/GM/NIGMS NIH HHS/ -- U54 AI057157/AI/NIAID NIH HHS/ -- U54 AI057157-06/AI/NIAID NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Apr 16;328(5976):357-60. doi: 10.1126/science.1186430. Epub 2010 Mar 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339031" target="_blank"〉PubMed〈/a〉
    Keywords: Age Factors ; Amino Acid Sequence ; Antibodies, Neutralizing/chemistry/immunology ; Antibodies, Viral/chemistry/immunology ; Antigenic Variation ; Cross Reactions ; Crystallography, X-Ray ; Disease Outbreaks ; Epitopes ; Glycosylation ; Hemagglutinin Glycoproteins, Influenza Virus/*chemistry/*immunology ; Hemagglutinins, Viral/*chemistry/*immunology ; Humans ; Immunoglobulin Fab Fragments/chemistry/immunology ; Influenza A Virus, H1N1 Subtype/*immunology ; Influenza Vaccines/immunology ; Influenza, Human/epidemiology/*immunology/virology ; Models, Molecular ; Molecular Sequence Data ; Protein Conformation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Structures of the CXCR4 chemokine GPCR with small-molecule and cyclic peptide antagonists (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-12
    Description: Chemokine receptors are critical regulators of cell migration in the context of immune surveillance, inflammation, and development. The G protein-coupled chemokine receptor CXCR4 is specifically implicated in cancer metastasis and HIV-1 infection. Here we report five independent crystal structures of CXCR4 bound to an antagonist small molecule IT1t and a cyclic peptide CVX15 at 2.5 to 3.2 angstrom resolution. All structures reveal a consistent homodimer with an interface including helices V and VI that may be involved in regulating signaling. The location and shape of the ligand-binding sites differ from other G protein-coupled receptors and are closer to the extracellular surface. These structures provide new clues about the interactions between CXCR4 and its natural ligand CXCL12, and with the HIV-1 glycoprotein gp120.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074590/" 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/PMC3074590/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Beili -- Chien, Ellen Y T -- Mol, Clifford D -- Fenalti, Gustavo -- Liu, Wei -- Katritch, Vsevolod -- Abagyan, Ruben -- Brooun, Alexei -- Wells, Peter -- Bi, F Christopher -- Hamel, Damon J -- Kuhn, Peter -- Handel, Tracy M -- Cherezov, Vadim -- Stevens, Raymond C -- F32 GM083463/GM/NIGMS NIH HHS/ -- F32 GM083463-03/GM/NIGMS NIH HHS/ -- GM075915/GM/NIGMS NIH HHS/ -- P50 GM073197/GM/NIGMS NIH HHS/ -- P50 GM073197-07/GM/NIGMS NIH HHS/ -- R01 AI037113/AI/NIAID NIH HHS/ -- R01 AI037113-13/AI/NIAID NIH HHS/ -- R01 GM071872/GM/NIGMS NIH HHS/ -- R01 GM081763/GM/NIGMS NIH HHS/ -- R01 GM081763-03/GM/NIGMS NIH HHS/ -- R01 GM089857/GM/NIGMS NIH HHS/ -- R21 AI087189/AI/NIAID NIH HHS/ -- R21 AI087189-02/AI/NIAID NIH HHS/ -- R21 RR025336/RR/NCRR NIH HHS/ -- R21 RR025336-01A1/RR/NCRR NIH HHS/ -- U54 GM074961/GM/NIGMS NIH HHS/ -- U54 GM074961-050001/GM/NIGMS NIH HHS/ -- U54 GM094618/GM/NIGMS NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 19;330(6007):1066-71. doi: 10.1126/science.1194396. Epub 2010 Oct 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929726" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chemokine CXCL12 ; Crystallography, X-Ray ; HIV Envelope Protein gp120/metabolism ; Humans ; Membrane Proteins ; Models, Molecular ; Protein Binding ; Protein Conformation ; Protein Multimerization ; Receptors, CXCR4/antagonists & inhibitors/*chemistry/metabolism ; Recombinant Proteins/chemistry ; Spodoptera ; Thiourea/analogs & derivatives/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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  • 21
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    Shaping development of autophagy inhibitors with the structure of the lipid kinase Vps34 (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-27
    Description: Phosphoinositide 3-kinases (PI3Ks) are lipid kinases with diverse roles in health and disease. The primordial PI3K, Vps34, is present in all eukaryotes and has essential roles in autophagy, membrane trafficking, and cell signaling. We solved the crystal structure of Vps34 at 2.9 angstrom resolution, which revealed a constricted adenine-binding pocket, suggesting the reason that specific inhibitors of this class of PI3K have proven elusive. Both the phosphoinositide-binding loop and the carboxyl-terminal helix of Vps34 mediate catalysis on membranes and suppress futile adenosine triphosphatase cycles. Vps34 appears to alternate between a closed cytosolic form and an open form on the membrane. Structures of Vps34 complexes with a series of inhibitors reveal the reason that an autophagy inhibitor preferentially inhibits Vps34 and underpin the development of new potent and specific Vps34 inhibitors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2860105/" 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/PMC2860105/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, Simon -- Tavshanjian, Brandon -- Oleksy, Arkadiusz -- Perisic, Olga -- Houseman, Benjamin T -- Shokat, Kevan M -- Williams, Roger L -- MC_U105184308/Medical Research Council/United Kingdom -- U.1051.03.014(78824)/Medical Research Council/United Kingdom -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Mar 26;327(5973):1638-42. doi: 10.1126/science.1184429.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20339072" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine/*analogs & derivatives/metabolism/pharmacology ; Adenosine Triphosphatases/metabolism ; Animals ; Autophagy/*drug effects ; Binding Sites ; Catalysis ; Catalytic Domain ; Cell Membrane/metabolism ; Crystallography, X-Ray ; Drosophila Proteins/*antagonists & inhibitors/*chemistry/genetics/metabolism ; Drosophila melanogaster ; Enzyme Inhibitors/chemical synthesis/chemistry/*metabolism/pharmacology ; Furans/chemistry/metabolism/pharmacology ; Humans ; Hydrophobic and Hydrophilic Interactions ; Models, Molecular ; Phosphatidylinositol 3-Kinases/*antagonists & ; inhibitors/*chemistry/genetics/metabolism ; Phosphatidylinositols/metabolism ; Point Mutation ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Pyridines/chemistry/metabolism/pharmacology ; Pyrimidines/chemistry/metabolism/pharmacology
    Print ISSN: 0036-8075
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    Structural biology. The Tao of chloride transporter structure (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mindell, Joseph A -- New York, N.Y. -- Science. 2010 Oct 29;330(6004):601-2. doi: 10.1126/science.1198306.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Membrane Transport Biophysics Section, Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA. mindellj@ninds.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21030639" target="_blank"〉PubMed〈/a〉
    Keywords: Algal Proteins/*chemistry/metabolism ; Antiporters/*chemistry/metabolism ; Binding Sites ; Chloride Channels/*chemistry/metabolism ; Chlorides/*metabolism ; Crystallization ; Crystallography, X-Ray ; Cytoplasm/chemistry ; Eukaryota/*chemistry ; Glutamic Acid/metabolism ; Ion Channel Gating ; Ion Transport ; Models, Molecular ; Protein Structure, Tertiary ; Protons
    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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  • 23
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    Structure of the human BK channel Ca2+-activation apparatus at 3.0 A resolution (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-05-29
    Description: High-conductance voltage- and Ca2+-activated K+ (BK) channels encode negative feedback regulation of membrane voltage and Ca2+ signaling, playing a central role in numerous physiological processes. We determined the x-ray structure of the human BK Ca2+ gating apparatus at a resolution of 3.0 angstroms and deduced its tetrameric assembly by solving a 6 angstrom resolution structure of a Na+-activated homolog. Two tandem C-terminal regulator of K+ conductance (RCK) domains from each of four channel subunits form a 350-kilodalton gating ring at the intracellular membrane surface. A sequence of aspartic amino acids that is known as the Ca2+ bowl, and is located within the second of the tandem RCK domains, creates four Ca2+ binding sites on the outer perimeter of the gating ring at the "assembly interface" between RCK domains. Functionally important mutations cluster near the Ca2+ bowl, near the "flexible interface" between RCK domains, and on the surface of the gating ring that faces the voltage sensors. The structure suggests that the Ca2+ gating ring, in addition to regulating the pore directly, may also modulate the voltage sensor.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3022345/" 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/PMC3022345/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yuan, Peng -- Leonetti, Manuel D -- Pico, Alexander R -- Hsiung, Yichun -- MacKinnon, Roderick -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 GM043949/GM/NIGMS NIH HHS/ -- R01 GM043949-20/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Jul 9;329(5988):182-6. doi: 10.1126/science.1190414. Epub 2010 May 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, Howard Hughes Medical Institute, 1230 York Avenue, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20508092" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Calcium/*metabolism ; Crystallography, X-Ray ; Humans ; *Ion Channel Gating ; Large-Conductance Calcium-Activated Potassium Channel alpha ; Subunits/*chemistry/genetics/*metabolism ; Ligands ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Patch-Clamp Techniques ; Protein Conformation ; Protein Folding ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Sodium/metabolism
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  • 24
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    Structure of a eukaryotic CLC transporter defines an intermediate state in the transport cycle (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-10-12
    Description: CLC proteins transport chloride (Cl(-)) ions across cell membranes to control the electrical potential of muscle cells, transfer electrolytes across epithelia, and control the pH and electrolyte composition of intracellular organelles. Some members of this protein family are Cl(-) ion channels, whereas others are secondary active transporters that exchange Cl(-) ions and protons (H(+)) with a 2:1 stoichiometry. We have determined the structure of a eukaryotic CLC transporter at 3.5 angstrom resolution. Cytoplasmic cystathionine beta-synthase (CBS) domains are strategically positioned to regulate the ion-transport pathway, and many disease-causing mutations in human CLCs reside on the CBS-transmembrane interface. Comparison with prokaryotic CLC shows that a gating glutamate residue changes conformation and suggests a basis for 2:1 Cl(-)/H(+) exchange and a simple mechanistic connection between CLC channels and transporters.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3079386/" 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/PMC3079386/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Feng, Liang -- Campbell, Ernest B -- Hsiung, Yichun -- MacKinnon, Roderick -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 GM043949/GM/NIGMS NIH HHS/ -- R01 GM043949-20/GM/NIGMS NIH HHS/ -- R01 GM043949-21/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Oct 29;330(6004):635-41. doi: 10.1126/science.1195230. Epub 2010 Sep 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, Howard Hughes Medical Institute, 1230 York Avenue, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929736" target="_blank"〉PubMed〈/a〉
    Keywords: Algal Proteins/chemistry/metabolism ; Animals ; Antiporters/*chemistry/metabolism ; Binding Sites ; Cell Line ; Cell Membrane/chemistry ; Chloride Channels/*chemistry/metabolism ; Chlorides/*metabolism ; Crystallization ; Crystallography, X-Ray ; Cystathionine beta-Synthase/chemistry ; Cytoplasm/chemistry ; Glutamic Acid/metabolism ; Ion Channel Gating ; Ion Transport ; Models, Biological ; Models, Molecular ; Protein Conformation ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Protons ; Rhodophyta/*chemistry/metabolism
    Print ISSN: 0036-8075
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    Structure and mechanisms of a protein-based organelle in Escherichia coli (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-01-02
    Description: Many bacterial cells contain proteinaceous microcompartments that act as simple organelles by sequestering specific metabolic processes involving volatile or toxic metabolites. Here we report the three-dimensional (3D) crystal structures, with resolutions between 1.65 and 2.5 angstroms, of the four homologous proteins (EutS, EutL, EutK, and EutM) that are thought to be the major shell constituents of a functionally complex ethanolamine utilization (Eut) microcompartment. The Eut microcompartment is used to sequester the metabolism of ethanolamine in bacteria such as Escherichia coli and Salmonella enterica. The four Eut shell proteins share an overall similar 3D fold, but they have distinguishing structural features that help explain the specific roles they play in the microcompartment. For example, EutL undergoes a conformational change that is probably involved in gating molecular transport through shell protein pores, whereas structural evidence suggests that EutK might bind a nucleic acid component. Together these structures give mechanistic insight into bacterial microcompartments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tanaka, Shiho -- Sawaya, Michael R -- Yeates, Todd O -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Jan 1;327(5961):81-4. doi: 10.1126/science.1179513.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry, University of California Los Angeles, 611 Charles Young Drive East, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20044574" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; *Cell Compartmentation ; Crystallography, X-Ray ; Escherichia coli K12/*chemistry/*metabolism/ultrastructure ; Escherichia coli Proteins/*chemistry/metabolism ; Ethanolamine/*metabolism ; Metabolic Networks and Pathways ; Models, Molecular ; Molecular Sequence Data ; Polyproteins/*chemistry/metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism
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    A gating charge transfer center in voltage sensors (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-04-03
    Description: Voltage sensors regulate the conformations of voltage-dependent ion channels and enzymes. Their nearly switchlike response as a function of membrane voltage comes from the movement of positively charged amino acids, arginine or lysine, across the membrane field. We used mutations with natural and unnatural amino acids, electrophysiological recordings, and x-ray crystallography to identify a charge transfer center in voltage sensors that facilitates this movement. This center consists of a rigid cyclic "cap" and two negatively charged amino acids to interact with a positive charge. Specific mutations induce a preference for lysine relative to arginine. By placing lysine at specific locations, the voltage sensor can be stabilized in different conformations, which enables a dissection of voltage sensor movements and their relation to ion channel opening.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2869078/" 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/PMC2869078/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tao, Xiao -- Lee, Alice -- Limapichat, Walrati -- Dougherty, Dennis A -- MacKinnon, Roderick -- GM43949/GM/NIGMS NIH HHS/ -- NS 34407/NS/NINDS NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 GM043949/GM/NIGMS NIH HHS/ -- R01 GM043949-20/GM/NIGMS NIH HHS/ -- R37 NS034407/NS/NINDS NIH HHS/ -- R37 NS034407-15/NS/NINDS NIH HHS/ -- R37 NS034407-15S1/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Apr 2;328(5974):67-73. doi: 10.1126/science.1185954.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, Howard Hughes Medical Institute, 1230 York Avenue, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20360102" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Arginine/chemistry ; Binding Sites ; Crystallography, X-Ray ; Electric Capacitance ; *Ion Channel Gating ; Kv1.2 Potassium Channel/*chemistry/*metabolism ; Lysine/chemistry ; Models, Molecular ; Molecular Sequence Data ; Patch-Clamp Techniques ; Phenylalanine/chemistry ; Protein Conformation ; Rats ; Recombinant Fusion Proteins/chemistry/metabolism ; Shab Potassium Channels/*chemistry/*metabolism ; Shaker Superfamily of Potassium Channels/chemistry/metabolism ; Tryptophan/chemistry ; Xenopus laevis
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  • 27
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    Structural basis for broad and potent neutralization of HIV-1 by antibody VRC01 (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-07-10
    Description: During HIV-1 infection, antibodies are generated against the region of the viral gp120 envelope glycoprotein that binds CD4, the primary receptor for HIV-1. Among these antibodies, VRC01 achieves broad neutralization of diverse viral strains. We determined the crystal structure of VRC01 in complex with a human immunodeficiency virus HIV-1 gp120 core. VRC01 partially mimics CD4 interaction with gp120. A shift from the CD4-defined orientation, however, focuses VRC01 onto the vulnerable site of initial CD4 attachment, allowing it to overcome the glycan and conformational masking that diminishes the neutralization potency of most CD4-binding-site antibodies. To achieve this recognition, VRC01 contacts gp120 mainly through immunoglobulin V-gene regions substantially altered from their genomic precursors. Partial receptor mimicry and extensive affinity maturation thus facilitate neutralization of HIV-1 by natural human antibodies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2981354/" 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/PMC2981354/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhou, Tongqing -- Georgiev, Ivelin -- Wu, Xueling -- Yang, Zhi-Yong -- Dai, Kaifan -- Finzi, Andres -- Kwon, Young Do -- Scheid, Johannes F -- Shi, Wei -- Xu, Ling -- Yang, Yongping -- Zhu, Jiang -- Nussenzweig, Michel C -- Sodroski, Joseph -- Shapiro, Lawrence -- Nabel, Gary J -- Mascola, John R -- Kwong, Peter D -- P30 AI060354/AI/NIAID NIH HHS/ -- Z99 AI999999/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Aug 13;329(5993):811-7. doi: 10.1126/science.1192819. Epub 2010 Jul 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health (NIH), Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20616231" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines ; Amino Acid Sequence ; Antibodies, Neutralizing/*chemistry/*immunology ; Antibody Affinity ; Antigenic Variation ; Antigens, CD4/chemistry/immunology/metabolism ; Base Sequence ; Binding Sites, Antibody ; Crystallography, X-Ray ; Epitopes/immunology ; HIV Antibodies/*chemistry/*immunology ; HIV Envelope Protein gp120/chemistry/genetics/*immunology ; HIV-1/*immunology ; Humans ; Immunoglobulin Fab Fragments/chemistry/immunology/metabolism ; Models, Molecular ; Molecular Mimicry ; Molecular Sequence Data ; Neutralization Tests ; Protein Conformation ; Protein Structure, Tertiary
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    Structural insights into the assembly and function of the SAGA deubiquitinating module (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-04-17
    Description: SAGA is a transcriptional coactivator complex that is conserved across eukaryotes and performs multiple functions during transcriptional activation and elongation. One role is deubiquitination of histone H2B, and this activity resides in a distinct subcomplex called the deubiquitinating module (DUBm), which contains the ubiquitin-specific protease Ubp8, bound to Sgf11, Sus1, and Sgf73. The deubiquitinating activity depends on the presence of all four DUBm proteins. We report here the 1.90 angstrom resolution crystal structure of the DUBm bound to ubiquitin aldehyde, as well as the 2.45 angstrom resolution structure of the uncomplexed DUBm. The structure reveals an arrangement of protein domains that gives rise to a highly interconnected complex, which is stabilized by eight structural zinc atoms that are critical for enzymatic activity. The structure suggests a model for how interactions with the other DUBm proteins activate Ubp8 and allows us to speculate about how the DUBm binds to monoubiquitinated histone H2B in nucleosomes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4220450/" 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/PMC4220450/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Samara, Nadine L -- Datta, Ajit B -- Berndsen, Christopher E -- Zhang, Xiangbin -- Yao, Tingting -- Cohen, Robert E -- Wolberger, Cynthia -- F32GM089037/GM/NIGMS NIH HHS/ -- R01 GM095822/GM/NIGMS NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 May 21;328(5981):1025-9. doi: 10.1126/science.1190049. Epub 2010 Apr 15.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics and Biophysical Chemistry, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20395473" target="_blank"〉PubMed〈/a〉
    Keywords: Aldehydes/chemistry/metabolism ; Crystallography, X-Ray ; Endopeptidases/*chemistry/metabolism ; Histone Acetyltransferases/*chemistry/metabolism ; Histones/metabolism ; Models, Biological ; Models, Molecular ; Nuclear Proteins/*chemistry/metabolism ; Nucleosomes/chemistry/metabolism ; Protein Binding ; Protein Conformation ; Protein Structure, Tertiary ; RNA-Binding Proteins/*chemistry/metabolism ; Saccharomyces cerevisiae Proteins/*chemistry/metabolism ; Trans-Activators/*chemistry/metabolism ; Transcription Factors/*chemistry/metabolism ; Ubiquitin/chemistry/*metabolism ; Ubiquitinated Proteins/metabolism ; Ubiquitination ; Ubiquitins/chemistry/metabolism ; Zinc/chemistry/metabolism ; Zinc Fingers
    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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    The molecular interaction of CAR and JAML recruits the central cell signal transducer PI3K (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-09-04
    Description: Coxsackie and adenovirus receptor (CAR) is the primary cellular receptor for group B coxsackieviruses and most adenovirus serotypes and plays a crucial role in adenoviral gene therapy. Recent discovery of the interaction between junctional adhesion molecule-like protein (JAML) and CAR uncovered important functional roles in immunity, inflammation, and tissue homeostasis. Crystal structures of JAML ectodomain (2.2 angstroms) and its complex with CAR (2.8 angstroms) reveal an unusual immunoglobulin-domain assembly for JAML and a charged interface that confers high specificity. Biochemical and mutagenesis studies illustrate how CAR-mediated clustering of JAML recruits phosphoinositide 3-kinase (P13K) to a JAML intracellular sequence motif as delineated for the alphabeta T cell costimulatory receptor CD28. Thus, CAR and JAML are cell signaling receptors of the immune system with implications for asthma, cancer, and chronic nonhealing wounds.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2951132/" 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/PMC2951132/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Verdino, Petra -- Witherden, Deborah A -- Havran, Wendy L -- Wilson, Ian A -- AI064811/AI/NIAID NIH HHS/ -- AI42266/AI/NIAID NIH HHS/ -- AI52257/AI/NIAID NIH HHS/ -- CA58896/CA/NCI NIH HHS/ -- R01 AI036964/AI/NIAID NIH HHS/ -- R01 AI052257/AI/NIAID NIH HHS/ -- R01 AI052257-05/AI/NIAID NIH HHS/ -- R01 AI064811/AI/NIAID NIH HHS/ -- R01 AI064811-01A1/AI/NIAID NIH HHS/ -- R01 CA058896/CA/NCI NIH HHS/ -- R01 CA058896-16A1/CA/NCI NIH HHS/ -- R01 GM080301/GM/NIGMS NIH HHS/ -- R37 AI042266/AI/NIAID NIH HHS/ -- R37 AI042266-13/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2010 Sep 3;329(5996):1210-4. doi: 10.1126/science.1187996.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20813955" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD28/metabolism ; Binding Sites ; CHO Cells ; Cell Adhesion Molecules/*chemistry/*metabolism ; Coxsackie and Adenovirus Receptor-Like Membrane Protein ; Cricetinae ; Cricetulus ; Crystallization ; Crystallography, X-Ray ; Epithelium/immunology ; Glycosylation ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Ligands ; Mice ; Phosphatidylinositol 3-Kinases/*metabolism ; Physicochemical Processes ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Protein Structure, Tertiary ; Receptors, Antigen, T-Cell, gamma-delta/immunology/metabolism ; Receptors, Virus/*chemistry/*metabolism ; *Signal Transduction ; T-Lymphocyte Subsets/immunology/metabolism
    Print ISSN: 0036-8075
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    AIDS/HIV. A boost for HIV vaccine design (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-08-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burton, Dennis R -- Weiss, Robin A -- New York, N.Y. -- Science. 2010 Aug 13;329(5993):770-3. doi: 10.1126/science.1194693.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology and Microbial Science and IAVI Neutralizing Antibody Center, The Scripps Research Institute, La Jolla, CA 92037, USA. burton@scripps.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20705840" target="_blank"〉PubMed〈/a〉
    Keywords: *AIDS Vaccines ; Antibodies, Monoclonal/immunology/isolation & purification ; Antibodies, Neutralizing/*chemistry/*immunology/isolation & purification ; B-Lymphocytes/immunology ; Binding Sites, Antibody ; Crystallography, X-Ray ; Drug Design ; Epitopes ; HIV Antibodies/*chemistry/*immunology/isolation & purification ; HIV Envelope Protein gp120/chemistry/*immunology ; HIV Infections/immunology ; HIV-1/*immunology ; Humans ; Protein Engineering
    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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    Kinetic scaffolding mediated by a phospholipase C-beta and Gq signaling complex (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-10-23
    Description: Transmembrane signals initiated by a broad range of extracellular stimuli converge on nodes that regulate phospholipase C (PLC)-dependent inositol lipid hydrolysis for signal propagation. We describe how heterotrimeric guanine nucleotide-binding proteins (G proteins) activate PLC-betas and in turn are deactivated by these downstream effectors. The 2.7-angstrom structure of PLC-beta3 bound to activated Galpha(q) reveals a conserved module found within PLC-betas and other effectors optimized for rapid engagement of activated G proteins. The active site of PLC-beta3 in the complex is occluded by an intramolecular plug that is likely removed upon G protein-dependent anchoring and orientation of the lipase at membrane surfaces. A second domain of PLC-beta3 subsequently accelerates guanosine triphosphate hydrolysis by Galpha(q), causing the complex to dissociate and terminate signal propagation. Mutations within this domain dramatically delay signal termination in vitro and in vivo. Consequently, this work suggests a dynamic catch-and-release mechanism used to sharpen spatiotemporal signals mediated by diverse sensory inputs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3046049/" 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/PMC3046049/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waldo, Gary L -- Ricks, Tiffany K -- Hicks, Stephanie N -- Cheever, Matthew L -- Kawano, Takeharu -- Tsuboi, Kazuhito -- Wang, Xiaoyue -- Montell, Craig -- Kozasa, Tohru -- Sondek, John -- Harden, T Kendall -- EY010852/EY/NEI NIH HHS/ -- GM074001/GM/NIGMS NIH HHS/ -- GM38213/GM/NIGMS NIH HHS/ -- GM57391/GM/NIGMS NIH HHS/ -- GM61454/GM/NIGMS NIH HHS/ -- R01 GM057391/GM/NIGMS NIH HHS/ -- R01 GM057391-13/GM/NIGMS NIH HHS/ -- R01 GM062299/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 12;330(6006):974-80. doi: 10.1126/science.1193438. Epub 2010 Oct 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20966218" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Catalytic Domain ; Crystallography, X-Ray ; Enzyme Activation ; GTP-Binding Protein alpha Subunits, Gq-G11/*chemistry/*metabolism ; Guanosine Triphosphate/metabolism ; Humans ; Hydrogen Bonding ; Hydrolysis ; Isoenzymes/chemistry/metabolism ; Kinetics ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis ; Phospholipase C beta/*chemistry/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Recombinant Fusion Proteins/chemistry/metabolism ; Signal Transduction
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    Alleviating cancer drug toxicity by inhibiting a bacterial enzyme (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-06
    Description: The dose-limiting side effect of the common colon cancer chemotherapeutic CPT-11 is severe diarrhea caused by symbiotic bacterial beta-glucuronidases that reactivate the drug in the gut. We sought to target these enzymes without killing the commensal bacteria essential for human health. Potent bacterial beta-glucuronidase inhibitors were identified by high-throughput screening and shown to have no effect on the orthologous mammalian enzyme. Crystal structures established that selectivity was based on a loop unique to bacterial beta-glucuronidases. Inhibitors were highly effective against the enzyme target in living aerobic and anaerobic bacteria, but did not kill the bacteria or harm mammalian cells. Finally, oral administration of an inhibitor protected mice from CPT-11-induced toxicity. Thus, drugs may be designed to inhibit undesirable enzyme activities in essential microbial symbiotes to enhance chemotherapeutic efficacy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3110694/" 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/PMC3110694/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wallace, Bret D -- Wang, Hongwei -- Lane, Kimberly T -- Scott, John E -- Orans, Jillian -- Koo, Ja Seol -- Venkatesh, Madhukumar -- Jobin, Christian -- Yeh, Li-An -- Mani, Sridhar -- Redinbo, Matthew R -- CA127231/CA/NCI NIH HHS/ -- CA98468/CA/NCI NIH HHS/ -- R01 CA127231/CA/NCI NIH HHS/ -- R01 CA127231-01A2/CA/NCI NIH HHS/ -- R01 CA127231-02/CA/NCI NIH HHS/ -- R01 CA127231-03/CA/NCI NIH HHS/ -- R01 CA161879/CA/NCI NIH HHS/ -- R01 DK073338/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 5;330(6005):831-5. doi: 10.1126/science.1191175.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of North Carolina, Chapel Hill, NC 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21051639" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents, Phytogenic/metabolism/*toxicity ; Bacteria, Anaerobic/drug effects ; Camptothecin/*analogs & derivatives/metabolism/toxicity ; Cell Line, Tumor ; Colon/drug effects/microbiology/pathology ; Crystallography, X-Ray ; Diarrhea/prevention & control ; Drug Evaluation, Preclinical ; Enzyme Inhibitors/chemistry/metabolism/*pharmacology ; Escherichia coli/enzymology ; Escherichia coli Proteins/antagonists & inhibitors/chemistry/isolation & ; purification/metabolism ; Female ; Glucuronidase/*antagonists & inhibitors/chemistry/isolation & ; purification/metabolism/*pharmacology ; Humans ; Intestinal Mucosa/drug effects/microbiology/pathology ; Mice ; Mice, Inbred BALB C ; Models, Molecular ; Prodrugs/metabolism/toxicity ; Protein Conformation
    Print ISSN: 0036-8075
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    Structural basis of biological N2O generation by bacterial nitric oxide reductase (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-27
    Description: Nitric oxide reductase (NOR) is an iron-containing enzyme that catalyzes the reduction of nitric oxide (NO) to generate a major greenhouse gas, nitrous oxide (N(2)O). Here, we report the crystal structure of NOR from Pseudomonas aeruginosa at 2.7 angstrom resolution. The structure reveals details of the catalytic binuclear center. The non-heme iron (Fe(B)) is coordinated by three His and one Glu ligands, but a His-Tyr covalent linkage common in cytochrome oxidases (COX) is absent. This structural characteristic is crucial for NOR reaction. Although the overall structure of NOR is closely related to COX, neither the D- nor K-proton pathway, which connect the COX active center to the intracellular space, was observed. Protons required for the NOR reaction are probably provided from the extracellular side.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hino, Tomoya -- Matsumoto, Yushi -- Nagano, Shingo -- Sugimoto, Hiroshi -- Fukumori, Yoshihiro -- Murata, Takeshi -- Iwata, So -- Shiro, Yoshitsugu -- New York, N.Y. -- Science. 2010 Dec 17;330(6011):1666-70. doi: 10.1126/science.1195591. Epub 2010 Nov 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21109633" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/chemistry/metabolism ; Catalytic Domain ; Crystallography, X-Ray ; Cytochromes c/chemistry ; Electron Transport ; Electron Transport Complex IV/chemistry/metabolism ; Heme/chemistry ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Iron/chemistry ; Membrane Proteins/chemistry/metabolism ; Models, Molecular ; Molecular Sequence Data ; Nitric Oxide/*metabolism ; Nitrous Oxide/*metabolism ; Oxidation-Reduction ; Oxidoreductases/*chemistry/*metabolism ; Protein Conformation ; Protein Multimerization ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits ; Protons ; Pseudomonas aeruginosa/*enzymology/metabolism
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    Light-induced structural changes in a photosynthetic reaction center caught by Laue diffraction (2010)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2010-05-01
    Description: Photosynthetic reaction centers convert the energy content of light into a transmembrane potential difference and so provide the major pathway for energy input into the biosphere. We applied time-resolved Laue diffraction to study light-induced conformational changes in the photosynthetic reaction center complex of Blastochloris viridis. The side chain of TyrL162, which lies adjacent to the special pair of bacteriochlorophyll molecules that are photooxidized in the primary light conversion event of photosynthesis, was observed to move 1.3 angstroms closer to the special pair after photoactivation. Free energy calculations suggest that this movement results from the deprotonation of this conserved tyrosine residue and provides a mechanism for stabilizing the primary charge separation reactions of photosynthesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wohri, Annemarie B -- Katona, Gergely -- Johansson, Linda C -- Fritz, Emelie -- Malmerberg, Erik -- Andersson, Magnus -- Vincent, Jonathan -- Eklund, Mattias -- Cammarata, Marco -- Wulff, Michael -- Davidsson, Jan -- Groenhof, Gerrit -- Neutze, Richard -- New York, N.Y. -- Science. 2010 Apr 30;328(5978):630-3. doi: 10.1126/science.1186159.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical and Biological Engineering, Chalmers University of Technology, Box 462, SE-40530 Goteborg, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20431017" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/*chemistry/metabolism ; Bacteriochlorophylls/chemistry/metabolism ; Crystallography, X-Ray ; Cytochromes c/chemistry/metabolism ; Electron Transport ; Hydrogen Bonding ; Hydrogen-Ion Concentration ; Hyphomicrobiaceae/*chemistry/metabolism ; *Light ; Models, Molecular ; Molecular Dynamics Simulation ; Oxidation-Reduction ; Photosynthetic Reaction Center Complex Proteins/*chemistry/metabolism ; Protein Conformation ; Protons ; Quinones/chemistry/metabolism ; Thermodynamics
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    Biochemistry. Catalyzing NO to N2O in the nitrogen cycle (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-18
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4012676/" 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/PMC4012676/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moenne-Loccoz, Pierre -- Fee, James A -- R01 GM035342/GM/NIGMS NIH HHS/ -- R01 GM074785/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Dec 17;330(6011):1632-3. doi: 10.1126/science.1200247.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Environmental & Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University, Beaverton, OR 97006, USA. ploccoz@ebs.ogi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21164002" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/chemistry/metabolism ; Catalytic Domain ; Crystallography, X-Ray ; Cytochrome b Group/chemistry/metabolism ; Cytochromes c/chemistry/metabolism ; Electron Transport ; Electron Transport Complex IV/chemistry/metabolism ; Evolution, Molecular ; Heme/chemistry ; Hydrophobic and Hydrophilic Interactions ; Models, Molecular ; Nitric Oxide/*metabolism ; *Nitrogen Cycle ; Nitrous Oxide/*metabolism ; Oxidation-Reduction ; Oxidoreductases/*chemistry/*metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Subunits ; Protons ; Pseudomonas aeruginosa/*enzymology
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    Structure of the human dopamine D3 receptor in complex with a D2/D3 selective antagonist (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-11-26
    Description: Dopamine modulates movement, cognition, and emotion through activation of dopamine G protein-coupled receptors in the brain. The crystal structure of the human dopamine D3 receptor (D3R) in complex with the small molecule D2R/D3R-specific antagonist eticlopride reveals important features of the ligand binding pocket and extracellular loops. On the intracellular side of the receptor, a locked conformation of the ionic lock and two distinctly different conformations of intracellular loop 2 are observed. Docking of R-22, a D3R-selective antagonist, reveals an extracellular extension of the eticlopride binding site that comprises a second binding pocket for the aryl amide of R-22, which differs between the highly homologous D2R and D3R. This difference provides direction to the design of D3R-selective agents for treating drug abuse and other neuropsychiatric indications.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3058422/" 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/PMC3058422/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chien, Ellen Y T -- Liu, Wei -- Zhao, Qiang -- Katritch, Vsevolod -- Han, Gye Won -- Hanson, Michael A -- Shi, Lei -- Newman, Amy Hauck -- Javitch, Jonathan A -- Cherezov, Vadim -- Stevens, Raymond C -- DA022413/DA/NIDA NIH HHS/ -- DA023694/DA/NIDA NIH HHS/ -- GM075915/GM/NIGMS NIH HHS/ -- K05 DA022413/DA/NIDA NIH HHS/ -- K05 DA022413-05/DA/NIDA NIH HHS/ -- MH54137/MH/NIMH NIH HHS/ -- P50 GM073197/GM/NIGMS NIH HHS/ -- P50 GM073197-07/GM/NIGMS NIH HHS/ -- R00 DA023694/DA/NIDA NIH HHS/ -- R00 DA023694-04/DA/NIDA NIH HHS/ -- R01 GM089857/GM/NIGMS NIH HHS/ -- R01 MH054137/MH/NIMH NIH HHS/ -- R01 MH054137-16/MH/NIMH NIH HHS/ -- R21 RR025336/RR/NCRR NIH HHS/ -- R21 RR025336-01A1/RR/NCRR NIH HHS/ -- U54 GM074961/GM/NIGMS NIH HHS/ -- U54 GM074961-050001/GM/NIGMS NIH HHS/ -- U54 GM094618/GM/NIGMS NIH HHS/ -- U54 GM094618-01/GM/NIGMS NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Nov 19;330(6007):1091-5. doi: 10.1126/science.1197410.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21097933" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arginine/chemistry ; Binding Sites ; Cell Line ; Crystallography, X-Ray ; Dopamine Antagonists/*chemistry ; Dopamine D2 Receptor Antagonists ; Humans ; Models, Molecular ; Protein Conformation ; Receptors, Dopamine D3/antagonists & inhibitors/*chemistry ; Recombinant Proteins/chemistry ; Salicylamides/*chemistry ; Spodoptera
    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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  • 37
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    In crystallo posttranslational modification within a MauG/pre-methylamine dehydrogenase complex (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-03-13
    Description: MauG is a diheme enzyme responsible for the posttranslational modification of two tryptophan residues to form the tryptophan tryptophylquinone (TTQ) cofactor of methylamine dehydrogenase (MADH). MauG converts preMADH, containing monohydroxylated betaTrp57, to fully functional MADH by catalyzing the insertion of a second oxygen atom into the indole ring and covalently linking betaTrp57 to betaTrp108. We have solved the x-ray crystal structure of MauG complexed with preMADH to 2.1 angstroms. The c-type heme irons and the nascent TTQ site are separated by long distances over which electron transfer must occur to achieve catalysis. In addition, one of the hemes has an atypical His-Tyr axial ligation. The crystalline protein complex is catalytically competent; upon addition of hydrogen peroxide, MauG-dependent TTQ synthesis occurs.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2878131/" 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/PMC2878131/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jensen, Lyndal M R -- Sanishvili, Ruslan -- Davidson, Victor L -- Wilmot, Carrie M -- GM41574/GM/NIGMS NIH HHS/ -- GM66569/GM/NIGMS NIH HHS/ -- R01 GM041574/GM/NIGMS NIH HHS/ -- R01 GM041574-20/GM/NIGMS NIH HHS/ -- R01 GM066569/GM/NIGMS NIH HHS/ -- R01 GM066569-08/GM/NIGMS NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2010 Mar 12;327(5971):1392-4. doi: 10.1126/science.1182492.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20223990" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/*chemistry/metabolism ; Biocatalysis ; Catalytic Domain ; Crystallography, X-Ray ; Enzyme Precursors/*chemistry/metabolism ; Hemeproteins/*chemistry/metabolism ; Hydrogen Peroxide/metabolism ; Indolequinones/*chemistry/metabolism ; Ligands ; Models, Molecular ; Molecular Sequence Data ; Oxidoreductases Acting on CH-NH Group Donors/*chemistry/metabolism ; Paracoccus denitrificans/chemistry/enzymology/*metabolism ; Protein Conformation ; *Protein Processing, Post-Translational ; Tryptophan/*analogs & derivatives/chemistry/metabolism
    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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  • 38
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    Structure of DNMT1-DNA complex reveals a role for autoinhibition in maintenance DNA methylation (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-12-18
    Description: Maintenance of genomic methylation patterns is mediated primarily by DNA methyltransferase-1 (DNMT1). We have solved structures of mouse and human DNMT1 composed of CXXC, tandem bromo-adjacent homology (BAH1/2), and methyltransferase domains bound to DNA-containing unmethylated CpG sites. The CXXC specifically binds to unmethylated CpG dinucleotide and positions the CXXC-BAH1 linker between the DNA and the active site of DNMT1, preventing de novo methylation. In addition, a loop projecting from BAH2 interacts with the target recognition domain (TRD) of the methyltransferase, stabilizing the TRD in a retracted position and preventing it from inserting into the DNA major groove. Our studies identify an autoinhibitory mechanism, in which unmethylated CpG dinucleotides are occluded from the active site to ensure that only hemimethylated CpG dinucleotides undergo methylation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689315/" 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/PMC4689315/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Song, Jikui -- Rechkoblit, Olga -- Bestor, Timothy H -- Patel, Dinshaw J -- P30 CA008748/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2011 Feb 25;331(6020):1036-40. doi: 10.1126/science.1195380. Epub 2010 Dec 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21163962" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Catalytic Domain ; Crystallography, X-Ray ; Cysteine ; DNA/*chemistry/*metabolism ; DNA (Cytosine-5-)-Methyltransferase/*chemistry/*metabolism ; *DNA Methylation ; DNA-Cytosine Methylases/chemistry/metabolism ; Dinucleoside Phosphates/chemistry/metabolism ; Humans ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Nucleic Acid Conformation ; Protein Binding ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Substrate Specificity
    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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