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  • Articles  (12)
  • Protein Conformation  (12)
  • 2005-2009
  • 2000-2004  (12)
  • 2003  (12)
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  • Articles  (12)
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  • 2005-2009
  • 2000-2004  (12)
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  • 1
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    Biomedicine. A view from the top--prion diseases from 10,000 feet (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Priola, Suzette A -- Chesebro, Bruce -- Caughey, Byron -- New York, N.Y. -- Science. 2003 May 9;300(5621):917-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Persistent Viral Diseases, National Institute of Allergy and Infectious Diseases, Rocky Mountain Laboratories, Hamilton, MT 59840, USA. spriola@nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12738843" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism/pathology ; Cell Membrane/metabolism ; Cytosol/metabolism ; Humans ; Membrane Microdomains/metabolism ; Mice ; Mice, Transgenic ; Phenotype ; PrPC Proteins/*chemistry/*metabolism ; PrPSc Proteins/*chemistry/*pathogenicity ; Prion Diseases/diagnosis/*etiology/metabolism/pathology ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Transport ; Tongue/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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  • 2
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    Cylindrical channels from concave helices (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-02-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Calladine, C R -- Pratap, V -- Chandran, V -- Mizuguchi, K -- Luisi, B F -- New York, N.Y. -- Science. 2003 Jan 31;299(5607):661-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12561825" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Crystallography, X-Ray ; Escherichia coli Proteins/*chemistry ; Glycine/chemistry ; Ion Channels/*chemistry ; *Models, Molecular ; Protein Conformation ; Protein Structure, Secondary
    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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    Antibody domain exchange is an immunological solution to carbohydrate cluster recognition (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-06-28
    Description: Human antibody 2G12 neutralizes a broad range of human immunodeficiency virus type 1 (HIV-1) isolates by binding an unusually dense cluster of carbohydrate moieties on the "silent" face of the gp120 envelope glycoprotein. Crystal structures of Fab 2G12 and its complexes with the disaccharide Manalpha1-2Man and with the oligosaccharide Man9GlcNAc2 revealed that two Fabs assemble into an interlocked VH domain-swapped dimer. Further biochemical, biophysical, and mutagenesis data strongly support a Fab-dimerized antibody as the prevalent form that recognizes gp120. The extraordinary configuration of this antibody provides an extended surface, with newly described binding sites, for multivalent interaction with a conserved cluster of oligomannose type sugars on the surface of gp120. The unique interdigitation of Fab domains within an antibody uncovers a previously unappreciated mechanism for high-affinity recognition of carbohydrate or other repeating epitopes on cell or microbial surfaces.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Calarese, Daniel A -- Scanlan, Christopher N -- Zwick, Michael B -- Deechongkit, Songpon -- Mimura, Yusuke -- Kunert, Renate -- Zhu, Ping -- Wormald, Mark R -- Stanfield, Robyn L -- Roux, Kenneth H -- Kelly, Jeffery W -- Rudd, Pauline M -- Dwek, Raymond A -- Katinger, Hermann -- Burton, Dennis R -- Wilson, Ian A -- AI33292/AI/NIAID NIH HHS/ -- GM46192/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Jun 27;300(5628):2065-71.〈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/12829775" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal/chemistry/immunology/metabolism ; Antibody Affinity ; Antibody Specificity ; Binding Sites, Antibody ; Cell Adhesion Molecules/metabolism ; Centrifugation, Density Gradient ; Crystallization ; Crystallography, X-Ray ; Dimerization ; Disaccharides/chemistry/metabolism ; Epitopes ; HIV Antibodies/*chemistry/genetics/*immunology/metabolism ; HIV Envelope Protein gp120/*immunology ; HIV-1/*immunology ; Humans ; Hydrogen Bonding ; Immunoglobulin Fab Fragments/*chemistry/genetics/*immunology/metabolism ; Immunoglobulin Heavy Chains/chemistry/immunology ; Immunoglobulin Light Chains/chemistry/immunology ; Immunoglobulin Variable Region/chemistry/immunology ; Lectins/chemistry/immunology/metabolism ; Lectins, C-Type/metabolism ; Ligands ; Mannans/chemistry/metabolism ; Mannosides/chemistry/metabolism ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis ; Oligosaccharides/chemistry/*immunology/metabolism ; Protein Conformation ; Protein Structure, Tertiary ; Receptors, Cell Surface/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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    Peroxiredoxin evolution and the regulation of hydrogen peroxide signaling (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-26
    Description: Eukaryotic 2-Cys peroxiredoxins (2-Cys Prxs) not only act as antioxidants, but also appear to regulate hydrogen peroxide-mediated signal transduction. We show that bacterial 2-Cys Prxs are much less sensitive to oxidative inactivation than are eukaryotic 2-Cys Prxs. By identifying two sequence motifs unique to the sensitive 2-Cys Prxs and comparing the crystal structure of a bacterial 2-Cys Prx at 2.2 angstrom resolution with other Prx structures, we define the structural origins of sensitivity. We suggest this adaptation allows 2-Cys Prxs to act as floodgates, keeping resting levels of hydrogen peroxide low, while permitting higher levels during signal transduction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wood, Zachary A -- Poole, Leslie B -- Karplus, P Andrew -- ES00210/ES/NIEHS NIH HHS/ -- GM50389/GM/NIGMS NIH HHS/ -- R01 GM050389/GM/NIGMS NIH HHS/ -- R01 GM050389-10/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):650-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97333, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714747" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Bacteria/enzymology ; Binding Sites ; Catalysis ; Crystallography, X-Ray ; Cysteine/metabolism ; Disulfides/chemistry/metabolism ; Evolution, Molecular ; Humans ; Hydrogen Peroxide/*metabolism ; Models, Chemical ; Models, Molecular ; Molecular Sequence Data ; Oxidation-Reduction ; Peroxidases/*chemistry/*metabolism ; Peroxiredoxins ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Salmonella typhimurium/*enzymology ; Sequence Alignment ; *Signal Transduction ; Sulfenic Acids/metabolism ; Sulfinic Acids/metabolism ; Yeasts/enzymology
    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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    Architecture of succinate dehydrogenase and reactive oxygen species generation (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-02-01
    Description: The structure of Escherichia coli succinate dehydrogenase (SQR), analogous to the mitochondrial respiratory complex II, has been determined, revealing the electron transport pathway from the electron donor, succinate, to the terminal electron acceptor, ubiquinone. It was found that the SQR redox centers are arranged in a manner that aids the prevention of reactive oxygen species (ROS) formation at the flavin adenine dinucleotide. This is likely to be the main reason SQR is expressed during aerobic respiration rather than the related enzyme fumarate reductase, which produces high levels of ROS. Furthermore, symptoms of genetic disorders associated with mitochondrial SQR mutations may be a result of ROS formation resulting from impaired electron transport in the enzyme.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yankovskaya, Victoria -- Horsefield, Rob -- Tornroth, Susanna -- Luna-Chavez, Cesar -- Miyoshi, Hideto -- Leger, Christophe -- Byrne, Bernadette -- Cecchini, Gary -- Iwata, So -- GM61606/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Jan 31;299(5607):700-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biology Division, VA Medical Center, San Francisco, CA 94121, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12560550" target="_blank"〉PubMed〈/a〉
    Keywords: Aerobiosis ; Anaerobiosis ; Binding Sites ; Crystallography, X-Ray ; Dinitrophenols/chemistry/pharmacology ; Electron Transport ; Electron Transport Complex II ; Escherichia coli/*enzymology ; Flavin-Adenine Dinucleotide/metabolism ; Heme/chemistry ; Models, Molecular ; Multienzyme Complexes/antagonists & inhibitors/*chemistry/genetics/*metabolism ; Mutation ; Oxidation-Reduction ; Oxidoreductases/antagonists & inhibitors/*chemistry/genetics/*metabolism ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Reactive Oxygen Species/*metabolism ; Succinate Dehydrogenase/antagonists & inhibitors/*chemistry/genetics/*metabolism ; Succinic Acid/metabolism ; Superoxides/metabolism ; Ubiquinone/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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  • 6
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    Structural biology. Breaching the barrier (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-08-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Locher, Kaspar P -- Bass, Randal B -- Rees, Douglas C -- New York, N.Y. -- Science. 2003 Aug 1;301(5633):603-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institut fur Molekularbiologie und Biophysik, Eidgenossische Technische Hochschule Zurich, Zurich CH-8093, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12893929" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Biological Transport ; Cell Membrane/enzymology ; Crystallography, X-Ray ; Escherichia coli/chemistry/enzymology ; Escherichia coli Proteins/*chemistry/metabolism ; Glycerophosphates/metabolism ; Lactose/metabolism ; Membrane Transport Proteins/*chemistry/metabolism ; Models, Molecular ; *Monosaccharide Transport Proteins ; Phosphates/metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; *Symporters
    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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  • 7
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    Molecular architecture of the multiprotein splicing factor SF3b (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-10
    Description: The splicing factor SF3b is a multiprotein complex essential for the accurate excision of introns from pre-messenger RNA. As an integral component of the U2 small nuclear ribonucleoprotein (snRNP) and the U11/U12 di-snRNP, SF3b is involved in the recognition of the pre-messenger RNA's branch site within the major and minor spliceosomes. We have determined the three-dimensional structure of the human SF3b complex by single-particle electron cryomicroscopy at a resolution of less than 10 angstroms, allowing identification of protein domains with known structural folds. The best fit of a modeled RNA-recognition motif indicates that the protein p14 is located in the central cavity of the complex. The 22 tandem helical repeats of the protein SF3b155 are located in the outer shell of the complex enclosing p14.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Golas, Monika M -- Sander, Bjoern -- Will, Cindy L -- Luhrmann, Reinhard -- Stark, Holger -- New York, N.Y. -- Science. 2003 May 9;300(5621):980-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Gottingen, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12738865" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Cryoelectron Microscopy ; HeLa Cells ; Humans ; Image Processing, Computer-Assisted ; Macromolecular Substances ; Models, Molecular ; Multiprotein Complexes ; Phosphoproteins/*chemistry ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; RNA Precursors/chemistry/metabolism ; RNA Splicing ; *RNA-Binding Proteins ; Repetitive Sequences, Amino Acid ; Ribonucleoprotein, U2 Small Nuclear/*chemistry ; Spliceosomes/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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    Plant science. Hexokinase, Jack-of-all-trades (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Frommer, Wolf B -- Schulze, Waltraud X -- Lalonde, Sylvie -- New York, N.Y. -- Science. 2003 Apr 11;300(5617):261-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Physiology, Zentrum fur Molekularbiologie der Pflanzen, Universitat Tubingen, D-72076 Tubingen, Germany. frommer@zmbp.uni-tubingen.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12690178" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Arabidopsis/*enzymology/genetics/growth & development ; Biological Evolution ; Catalysis ; Cell Nucleus/metabolism ; Cytosol/enzymology ; Gene Expression Regulation ; Glucose/*metabolism ; Hexokinase/chemistry/genetics/*metabolism ; Humans ; Isoenzymes/metabolism ; Mutation ; Organelles/enzymology ; Phosphorylation ; Potassium Channels/metabolism ; Protein Conformation ; *Signal Transduction ; Yeasts/enzymology
    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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  • 9
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    Initiation and synergistic fibrillization of tau and alpha-synuclein (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-26
    Description: Alpha-synuclein (alpha-syn) and tau polymerize into amyloid fibrils and form intraneuronal filamentous inclusions characteristic of neurodegenerative diseases. We demonstrate that alpha-syn induces fibrillization of tau and that coincubation of tau and alpha-syn synergistically promotes fibrillization of both proteins. The in vivo relevance of these findings is grounded in the co-occurrence of alpha-syn and tau filamentous amyloid inclusions in humans, in single transgenic mice that express A53T human alpha-syn in neurons, and in oligodendrocytes of bigenic mice that express wild-type human alpha-syn plus P301L mutant tau. This suggests that interactions between alpha-syn and tau can promote their fibrillization and drive the formation of pathological inclusions in human neurodegenerative diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Giasson, Benoit I -- Forman, Mark S -- Higuchi, Makoto -- Golbe, Lawrence I -- Graves, Charles L -- Kotzbauer, Paul T -- Trojanowski, John Q -- Lee, Virginia M-Y -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):636-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714745" target="_blank"〉PubMed〈/a〉
    Keywords: Amyloid/chemistry/metabolism ; Animals ; Biopolymers ; *Brain Chemistry ; Humans ; Mice ; Mice, Inbred C3H ; Mice, Inbred C57BL ; Mice, Transgenic ; Microscopy, Electron ; Microscopy, Fluorescence ; Microscopy, Immunoelectron ; Nerve Tissue Proteins/analysis/*chemistry/metabolism ; Neurodegenerative Diseases/metabolism ; Neurons/chemistry ; Oligodendroglia/chemistry ; Protein Conformation ; Protein Isoforms/chemistry/metabolism ; Synucleins ; Tauopathies/metabolism ; alpha-Synuclein ; tau Proteins/analysis/*chemistry/metabolism
    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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    Single-molecule measurement of protein folding kinetics (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-08-30
    Description: In order to investigate the behavior of single molecules under conditions far from equilibrium, we have coupled a microfabricated laminar-flow mixer to a confocal optical system. This combination enables time-resolved measurement of Forster resonance energy transfer after an abrupt change in solution conditions. Observations of a small protein show the evolution of the intramolecular distance distribution as folding progresses. This technique can expose subpopulations, such as unfolded protein under conditions favoring the native structure, that would be obscured in equilibrium experiments.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lipman, Everett A -- Schuler, Benjamin -- Bakajin, Olgica -- Eaton, William A -- New York, N.Y. -- Science. 2003 Aug 29;301(5637):1233-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, Building 5, Room 104, National Institutes of Health, Bethesda, MD 20892-0520, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12947198" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/*chemistry ; Cold Temperature ; Diffusion ; Energy Transfer ; Fluorescence ; Fluorescence Resonance Energy Transfer ; Kinetics ; Models, Molecular ; Protein Conformation ; Protein Denaturation ; *Protein Folding ; Thermodynamics ; Thermotoga maritima/*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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