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  • Protein Conformation  (1,425)
  • American Association for the Advancement of Science (AAAS)  (1,425)
  • International Union of Crystallography (IUCr)
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  • 1
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    Enzymology. A moving story (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-02-23
    Description: 〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3907122/" 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/PMC3907122/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Falke, Joseph J -- R01 GM040731/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2002 Feb 22;295(5559):1480-1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Biophysics Program and the Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA. falke@colorado.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11859184" target="_blank"〉PubMed〈/a〉
    Keywords: Arginine/chemistry ; Binding Sites ; Catalysis ; Cyclophilin A/*chemistry/*metabolism ; Hydrogen Bonding ; Models, Molecular ; Nitrogen/chemistry ; Nuclear Magnetic Resonance, Biomolecular ; Protein Binding ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Thermodynamics
    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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    Visualization and functional analysis of RNA-dependent RNA polymerase lattices (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-06-22
    Description: Positive-strand RNA viruses such as poliovirus replicate their genomes on intracellular membranes of their eukaryotic hosts. Electron microscopy has revealed that purified poliovirus RNA-dependent RNA polymerase forms planar and tubular oligomeric arrays. The structural integrity of these arrays correlates with cooperative RNA binding and RNA elongation and is sensitive to mutations that disrupt intermolecular contacts predicted by the polymerase structure. Membranous vesicles isolated from poliovirus-infected cells contain structures consistent with the presence of two-dimensional polymerase arrays on their surfaces during infection. Therefore, host cytoplasmic membranes may function as physical foundations for two-dimensional polymerase arrays, conferring the advantages of surface catalysis to viral RNA replication.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lyle, John M -- Bullitt, Esther -- Bienz, Kurt -- Kirkegaard, Karla -- AI-42119/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2002 Jun 21;296(5576):2218-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12077417" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Binding Sites ; Catalysis ; Crystallography, X-Ray ; HeLa Cells ; Humans ; Hydrogen-Ion Concentration ; Inclusion Bodies, Viral/metabolism/ultrastructure ; Microscopy, Electron ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Nucleic Acid Conformation ; Poliovirus/*enzymology/physiology ; Protein Conformation ; Protein Structure, Quaternary ; Protein Structure, Tertiary ; RNA Replicase/*chemistry/isolation & purification/*metabolism/ultrastructure ; RNA, Viral/biosynthesis/*metabolism ; Viral Core Proteins/metabolism ; Virus Replication
    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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    Casting metal nanowires within discrete self-assembled peptide nanotubes (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-26
    Description: Tubular nanostructures are suggested to have a wide range of applications in nanotechnology. We report our observation of the self-assembly of a very short peptide, the Alzheimer's beta-amyloid diphenylalanine structural motif, into discrete and stiff nanotubes. Reduction of ionic silver within the nanotubes, followed by enzymatic degradation of the peptide backbone, resulted in the production of discrete nanowires with a long persistence length. The same dipeptide building block, made of D-phenylalanine, resulted in the production of enzymatically stable nanotubes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reches, Meital -- Gazit, Ehud -- New York, N.Y. -- Science. 2003 Apr 25;300(5619):625-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12714741" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Amyloid beta-Peptides/chemistry ; Biosensing Techniques ; Birefringence ; Dipeptides/*chemistry ; Microscopy, Electron ; Microscopy, Electron, Scanning ; Molecular Sequence Data ; *Nanotechnology ; Oxidation-Reduction ; Protein Conformation ; Silver ; Solubility ; Spectroscopy, Fourier Transform Infrared
    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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    Common structure of soluble amyloid oligomers implies common mechanism of pathogenesis (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-04-19
    Description: Soluble oligomers are common to most amyloids and may represent the primary toxic species of amyloids, like the Abeta peptide in Alzheimer's disease (AD). Here we show that all of the soluble oligomers tested display a common conformation-dependent structure that is unique to soluble oligomers regardless of sequence. The in vitro toxicity of soluble oligomers is inhibited by oligomer-specific antibody. Soluble oligomers have a unique distribution in human AD brain that is distinct from fibrillar amyloid. These results indicate that different types of soluble amyloid oligomers have a common structure and suggest they share a common mechanism of toxicity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kayed, Rakez -- Head, Elizabeth -- Thompson, Jennifer L -- McIntire, Theresa M -- Milton, Saskia C -- Cotman, Carl W -- Glabe, Charles G -- AG00538/AG/NIA NIH HHS/ -- AG16573/AG/NIA NIH HHS/ -- NS31230/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2003 Apr 18;300(5618):486-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697-3900, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12702875" target="_blank"〉PubMed〈/a〉
    Keywords: Aged ; Aged, 80 and over ; Alzheimer Disease/metabolism/pathology ; Amyloid/chemistry/toxicity ; Amyloid beta-Peptides/analysis/*chemistry/immunology/toxicity ; Animals ; Antibodies/immunology ; Antibody Specificity ; Biopolymers/analysis/chemistry/toxicity ; Brain/pathology ; Brain Chemistry ; Cell Survival ; Humans ; Microscopy, Confocal ; Microscopy, Electron ; Molecular Mimicry ; Neurofibrillary Tangles/chemistry ; Peptide Fragments/chemistry/immunology ; Protein Conformation ; Rabbits ; Solubility ; Tumor Cells, Cultured
    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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    Crystal structure of the GpIbalpha-thrombin complex essential for platelet aggregation (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-12
    Description: Direct interaction between platelet receptor glycoprotein Ibalpha (GpIbalpha) and thrombin is required for platelet aggregation and activation at sites of vascular injury. Abnormal GpIbalpha-thrombin binding is associated with many pathological conditions,including occlusive arterial thrombosis and bleeding disorders. The crystal structure of the GpIbalpha-thrombin complex at 2.6 angstrom resolution reveals simultaneous interactions of GpIbalpha with exosite I of one thrombin molecule,and with exosite II of a second thrombin molecule. In the crystal lattice,the periodic arrangement of GpIbalpha-thrombin complexes mirrors a scaffold that could serve as a driving force for tight platelet adhesion. The details of these interactions reconcile GpIbalpha-thrombin binding modes that are presently controversial,highlighting two distinct interfaces that are potential targets for development of novel antithrombotic drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dumas, John J -- Kumar, Ravindra -- Seehra, Jasbir -- Somers, William S -- Mosyak, Lidia -- New York, N.Y. -- Science. 2003 Jul 11;301(5630):222-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical and Screening Sciences, Wyeth, 200 Cambridge Park Drive, Cambridge, MA 02140, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12855811" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Blood Platelets/chemistry/physiology ; Crystallization ; Crystallography, X-Ray ; Humans ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Models, Molecular ; Platelet Adhesiveness ; *Platelet Aggregation ; Platelet Glycoprotein GPIb-IX Complex/*chemistry/*metabolism ; Protein Binding ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Thrombin/*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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    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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  • 7
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    Closing of the nucleotide pocket of kinesin-family motors upon binding to microtubules (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-06
    Description: We have used adenosine diphosphate analogs containing electron paramagnetic resonance (EPR) spin moieties and EPR spectroscopy to show that the nucleotide-binding site of kinesin-family motors closes when the motor.diphosphate complex binds to microtubules. Structural analyses demonstrate that a domain movement in the switch 1 region at the nucleotide site, homologous to domain movements in the switch 1 region in the G proteins [heterotrimeric guanine nucleotide-binding proteins], explains the EPR data. The switch movement primes the motor both for the free energy-yielding nucleotide hydrolysis reaction and for subsequent conformational changes that are crucial for the generation of force and directed motion along the microtubule.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Naber, Nariman -- Minehardt, Todd J -- Rice, Sarah -- Chen, Xiaoru -- Grammer, Jean -- Matuska, Marija -- Vale, Ronald D -- Kollman, Peter A -- Car, Roberto -- Yount, Ralph G -- Cooke, Roger -- Pate, Edward -- AR39643/AR/NIAMS NIH HHS/ -- AR42895/AR/NIAMS NIH HHS/ -- DK05915/DK/NIDDK NIH HHS/ -- GM29072/GM/NIGMS NIH HHS/ -- RR1081/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2003 May 2;300(5620):798-801.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of California, San Francisco, CA 94143, USA. naber@itsa.ucsf.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12730601" target="_blank"〉PubMed〈/a〉
    Keywords: Adenine Nucleotides/*metabolism ; Adenosine Diphosphate/analogs & derivatives/metabolism ; Adenosine Triphosphate/analogs & derivatives/metabolism ; Animals ; Binding Sites ; Computer Simulation ; Crystallography, X-Ray ; *Drosophila Proteins ; Drosophila melanogaster ; Electron Spin Resonance Spectroscopy ; Humans ; Hydrogen Bonding ; Hydrolysis ; Kinesin/*chemistry/*metabolism ; Microtubules/*metabolism ; Models, Molecular ; Molecular Motor Proteins/*chemistry/*metabolism ; Molecular Probes/metabolism ; Protein Conformation ; Spin Labels
    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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    Structural biology. Complex II is complex too (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-02-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hederstedt, Lars -- New York, N.Y. -- Science. 2003 Jan 31;299(5607):671-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Organism Biology, Lund University, SE-22362 Lund, Sweden. lars.hederstedt@cob.lu.se〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12560540" target="_blank"〉PubMed〈/a〉
    Keywords: Aerobiosis ; Anaerobiosis ; Binding Sites ; Crystallography, X-Ray ; Electron Transport ; Electron Transport Complex II ; Escherichia coli/*enzymology ; Flavin-Adenine Dinucleotide/metabolism ; Heme/chemistry/metabolism ; Models, Molecular ; Multienzyme Complexes/antagonists & inhibitors/*chemistry/*metabolism ; Oxidation-Reduction ; Oxidoreductases/antagonists & inhibitors/*chemistry/*metabolism ; Protein Conformation ; Protein Structure, Tertiary ; Protein Subunits/chemistry ; Reactive Oxygen Species/metabolism ; Succinate Dehydrogenase/antagonists & inhibitors/*chemistry/*metabolism ; Succinic Acid/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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  • 9
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    Genomics. Molecular prodigality (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bray, Dennis -- New York, N.Y. -- Science. 2003 Feb 21;299(5610):1189-90.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK. d.bray@zoo.cam.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12595679" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Substitution ; Animals ; Antibody Diversity ; Escherichia coli Proteins/chemistry/genetics/metabolism ; Evolution, Molecular ; Genetic Variation ; Genomics ; Histones/chemistry/genetics/metabolism ; Humans ; Methylation ; Phenotype ; Potassium Channels/chemistry/genetics/metabolism ; Protein Conformation ; Protein Isoforms/chemistry/metabolism ; Protein Processing, Post-Translational ; Proteins/*chemistry/genetics/*metabolism ; Proteomics ; RNA Splicing ; Receptors, Cell Surface/chemistry/genetics/metabolism ; Selection, Genetic ; Troponin T/chemistry/genetics/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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  • 10
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    Structural basis of multiple drug-binding capacity of the AcrB multidrug efflux pump (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-10
    Description: Multidrug efflux pumps cause serious problems in cancer chemotherapy and treatment of bacterial infections. Yet high-resolution structures of ligand transporter complexes have previously been unavailable. We obtained x-ray crystallographic structures of the trimeric AcrB pump from Escherichia coli with four structurally diverse ligands. The structures show that three molecules of ligands bind simultaneously to the extremely large central cavity of 5000 cubic angstroms, primarily by hydrophobic, aromatic stacking and van der Waals interactions. Each ligand uses a slightly different subset of AcrB residues for binding. The bound ligand molecules often interact with each other, stabilizing the binding.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Edward W -- McDermott, Gerry -- Zgurskaya, Helen I -- Nikaido, Hiroshi -- Koshland, Daniel E Jr -- AI 09644/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2003 May 9;300(5621):976-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3202, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12738864" target="_blank"〉PubMed〈/a〉
    Keywords: Anti-Infective Agents/chemistry/metabolism ; Anti-Infective Agents, Local/chemistry/metabolism ; Binding Sites ; Carrier Proteins/*chemistry/isolation & purification/*metabolism ; Cell Membrane/chemistry ; Chemistry, Physical ; Ciprofloxacin/chemistry/metabolism ; Crystallization ; Crystallography, X-Ray ; Dequalinium/chemistry/metabolism ; Escherichia coli Proteins/*chemistry/isolation & purification/*metabolism ; Ethidium/chemistry/metabolism ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Ligands ; Membrane Proteins/*chemistry/isolation & purification/*metabolism ; Models, Molecular ; Multidrug Resistance-Associated Proteins ; Physicochemical Phenomena ; Protein Binding ; Protein Conformation ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Rhodamines/chemistry/metabolism ; Static Electricity
    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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