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  • Protein Structure, Tertiary  (113)
  • American Association for the Advancement of Science (AAAS)  (113)
  • 2010-2014  (31)
  • 2000-2004  (82)
  • 2014  (31)
  • 2003  (82)
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  • 2010-2014  (31)
  • 2000-2004  (82)
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  • 101
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    BRCT repeats as phosphopeptide-binding modules involved in protein targeting (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-10-25
    Description: We used a proteomic approach to identify phosphopeptide-binding modules mediating signal transduction events in the DNA damage response pathway. Using a library of partially degenerate phosphopeptides, we identified tandem BRCT (BRCA1 carboxyl-terminal) domains in PTIP (Pax transactivation domain-interacting protein) and in BRCA1 as phosphoserine- or phosphothreonine-specific binding modules that recognize substrates phosphorylated by the kinases ATM (ataxia telangiectasia-mutated) and ATR (ataxia telangiectasia- and RAD3-related) in response to gamma-irradiation. PTIP tandem BRCT domains are responsible for phosphorylation-dependent protein localization into 53BP1- and phospho-H2AX (gamma-H2AX)-containing nuclear foci, a marker of DNA damage. These findings provide a molecular basis for BRCT domain function in the DNA damage response and may help to explain why the BRCA1 BRCT domain mutation Met1775 --〉 Arg, which fails to bind phosphopeptides, predisposes women to breast and ovarian cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Manke, Isaac A -- Lowery, Drew M -- Nguyen, Anhco -- Yaffe, Michael B -- GM60594/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Oct 24;302(5645):636-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14576432" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Ataxia Telangiectasia Mutated Proteins ; BRCA1 Protein/*chemistry/*metabolism ; Caffeine/pharmacology ; Calorimetry ; Carrier Proteins/*chemistry/*metabolism ; Cell Cycle Proteins/antagonists & inhibitors/metabolism ; Cell Nucleus/metabolism ; Cytosol/metabolism ; DNA Damage ; DNA-Binding Proteins ; Gamma Rays ; Humans ; Nuclear Proteins/*chemistry/*metabolism ; Peptide Library ; Phosphopeptides/*metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Phosphothreonine/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/antagonists & inhibitors/metabolism ; Proteomics ; Signal Transduction ; Tumor Cells, Cultured ; Tumor Suppressor Proteins
    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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  • 102
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    Structural biology. Changing partners (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-06
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hynes, Richard O -- New York, N.Y. -- Science. 2003 May 2;300(5620):755-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. rohynes@mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12730590" target="_blank"〉PubMed〈/a〉
    Keywords: Biopolymers ; *Cell Adhesion ; Cell Membrane/*chemistry ; Cytoplasm/chemistry ; Dimerization ; Fibrinogen/metabolism ; Focal Adhesion Protein-Tyrosine Kinases ; Integrins/*chemistry/*metabolism ; Ligands ; Lipid Bilayers ; Models, Biological ; Mutation ; Platelet Glycoprotein GPIIb-IIIa Complex/*chemistry/genetics/*metabolism ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein-Tyrosine Kinases/metabolism ; Receptor Aggregation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 103
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    Crystal structure of the potassium channel KirBac1.1 in the closed state (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-10
    Description: The KirBac1.1 channel belongs to the inward-rectifier family of potassium channels. Here we report the structure of the entire prokaryotic Kir channel assembly, in the closed state, refined to a resolution of 3.65 angstroms. We identify the main activation gate and structural elements involved in gating. On the basis of structural evidence presented here, we suggest that gating involves coupling between the intracellular and membrane domains. This further suggests that initiation of gating by membrane or intracellular signals represents different entry points to a common mechanistic pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kuo, Anling -- Gulbis, Jacqueline M -- Antcliff, Jennifer F -- Rahman, Tahmina -- Lowe, Edward D -- Zimmer, Jochen -- Cuthbertson, Jonathan -- Ashcroft, Frances M -- Ezaki, Takayuki -- Doyle, Declan A -- New York, N.Y. -- Science. 2003 Jun 20;300(5627):1922-6. Epub 2003 May 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Oxford, Department of Biochemistry, Laboratory of Molecular Biophysics, South Parks Road, Oxford OX1 3QU, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12738871" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Bacterial Proteins/*chemistry/metabolism ; Binding Sites ; Burkholderia pseudomallei/*chemistry ; Crystallization ; Crystallography, X-Ray ; Dimerization ; Hydrophobic and Hydrophilic Interactions ; *Ion Channel Gating ; Ion Transport ; Models, Molecular ; Molecular Sequence Data ; Potassium/metabolism ; Potassium Channels, Inwardly Rectifying/*chemistry/metabolism ; Protein Conformation ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary
    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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  • 104
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    R2D2, a bridge between the initiation and effector steps of the Drosophila RNAi pathway (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-27
    Description: The RNA interference (RNAi) pathway is initiated by processing long double-stranded RNA into small interfering RNA (siRNA). The siRNA-generating enzyme was purified from Drosophila S2cells and consists of two stoichiometric subunits: Dicer-2(DCR-2) and a previously unknown protein that we named R2D2. R2D2 is homologous to the Caenorhabditis elegans RNAi protein RDE-4. Association with R2D2 does not affect the enzymatic activity of DCR-2. Rather, the DCR-2/R2D2 complex, but not DCR-2 alone, binds to siRNA and enhances sequence-specific messenger RNA degradation mediated by the RNA-initiated silencing complex (RISC). These results indicate that R2D2 bridges the initiation and effector steps of the Drosophila RNAi pathway by facilitating siRNA passage from Dicer to RISC.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Liu, Qinghua -- Rand, Tim A -- Kalidas, Savitha -- Du, Fenghe -- Kim, Hyun-Eui -- Smith, Dean P -- Wang, Xiaodong -- DC02539/DC/NIDCD NIH HHS/ -- New York, N.Y. -- Science. 2003 Sep 26;301(5641):1921-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute and Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14512631" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Argonaute Proteins ; Biotinylation ; Caenorhabditis elegans/genetics/metabolism ; Caenorhabditis elegans Proteins/chemistry ; Cell Line ; Chemical Precipitation ; Drosophila Proteins/chemistry/genetics/*isolation & purification/*metabolism ; Drosophila melanogaster/*genetics/metabolism ; Electrophoretic Mobility Shift Assay ; Endoribonucleases/genetics/isolation & purification/*metabolism ; Kinetics ; Molecular Sequence Data ; Mutation ; Protein Structure, Tertiary ; RNA Helicases/genetics/*isolation & purification/*metabolism ; *RNA Interference ; RNA, Double-Stranded/metabolism ; RNA, Messenger/metabolism ; RNA, Small Interfering/*metabolism ; RNA-Binding Proteins/chemistry/genetics/isolation & purification/*metabolism ; RNA-Induced Silencing Complex/isolation & purification/metabolism ; Recombinant Proteins/metabolism ; Ribonuclease III
    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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  • 105
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    Keeping G proteins at bay: a complex between G protein-coupled receptor kinase 2 and Gbetagamma (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-24
    Description: The phosphorylation of heptahelical receptors by heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptor kinases (GRKs) is a universal regulatory mechanism that leads to desensitization of G protein signaling and to the activation of alternative signaling pathways. We determined the crystallographic structure of bovine GRK2 in complex with G protein beta1gamma2 subunits. Our results show how the three domains of GRK2-the RGS (regulator of G protein signaling) homology, protein kinase, and pleckstrin homology domains-integrate their respective activities and recruit the enzyme to the cell membrane in an orientation that not only facilitates receptor phosphorylation, but also allows for the simultaneous inhibition of signaling by Galpha and Gbetagamma subunits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lodowski, David T -- Pitcher, Julie A -- Capel, W Darrell -- Lefkowitz, Robert J -- Tesmer, John J G -- HL16037/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2003 May 23;300(5623):1256-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12764189" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Cattle ; Cell Membrane/metabolism ; Crystallography, X-Ray ; Cyclic AMP-Dependent Protein Kinases/*chemistry/*metabolism ; *GTP-Binding Protein beta Subunits ; *GTP-Binding Protein gamma Subunits ; Heterotrimeric GTP-Binding Proteins/*chemistry/*metabolism ; Hydrophobic and Hydrophilic Interactions ; Models, Molecular ; Molecular Sequence Data ; Phosphorylation ; Protein Binding ; Protein Conformation ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Signal Transduction ; beta-Adrenergic Receptor Kinases
    Print ISSN: 0036-8075
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  • 106
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    Activation of integrin alphaIIbbeta3 by modulation of transmembrane helix associations (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-06
    Description: Transmembrane helices of integrin alpha and beta subunits have been implicated in the regulation of integrin activity. Two mutations, glycine-708 to asparagine-708 (G708N)and methionine-701 to asparagine-701, in the transmembrane helix of the beta3 subunit enabled integrin alphaIIbbeta3 to constitutively bind soluble fibrinogen. Further characterization of the G708N mutant revealed that it induced alphaIIbbeta3 clustering and constitutive phosphorylation of focal adhesion kinase. This mutation also enhanced the tendency of the transmembrane helix to form homotrimers. These results suggest that homomeric associations involving transmembrane domains provide a driving force for integrin activation. They also suggest a structural basis for the coincidence of integrin activation and clustering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Renhao -- Mitra, Neal -- Gratkowski, Holly -- Vilaire, Gaston -- Litvinov, Rustem -- Nagasami, Chandrasekaran -- Weisel, John W -- Lear, James D -- DeGrado, William F -- Bennett, Joel S -- HL40387/HL/NHLBI NIH HHS/ -- HL54500/HL/NHLBI NIH HHS/ -- K01 CA096706/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 2003 May 2;300(5620):795-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Biophysics, School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12730600" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Antibodies, Monoclonal/metabolism ; Biopolymers ; CHO Cells ; Cell Adhesion ; Cell Membrane/*chemistry ; Cricetinae ; Cricetulus ; Dimerization ; Fibrinogen/metabolism ; Fluorescein-5-isothiocyanate ; Focal Adhesion Protein-Tyrosine Kinases ; Ligands ; Microscopy, Fluorescence ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Platelet Glycoprotein GPIIb-IIIa Complex/*chemistry/genetics/*metabolism ; Protein Conformation ; *Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein-Tyrosine Kinases/metabolism ; Receptor Aggregation
    Print ISSN: 0036-8075
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  • 107
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    Gating the selectivity filter in ClC chloride channels (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-22
    Description: ClC channels conduct chloride (Cl-) ions across cell membranes and thereby govern the electrical activity of muscle cells and certain neurons, the transport of fluid and electrolytes across epithelia, and the acidification of intracellular vesicles. The structural basis of ClC channel gating was studied. Crystal structures of wild-type and mutant Escherichia coli ClC channels bound to a monoclonal Fab fragment reveal three Cl- binding sites within the 15-angstrom neck of an hourglass-shaped pore. The Cl- binding site nearest the extracellular solution can be occupied either by a Cl- ion or by a glutamate carboxyl group. Mutations of this glutamate residue in Torpedo ray ClC channels alter gating in electrophysiological assays. These findings reveal a form of gating in which the glutamate carboxyl group closes the pore by mimicking a Cl- ion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dutzler, Raimund -- Campbell, Ernest B -- MacKinnon, Roderick -- New York, N.Y. -- Science. 2003 Apr 4;300(5616):108-12. Epub 2003 Mar 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12649487" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Substitution ; Animals ; Antibodies, Monoclonal/immunology ; Binding Sites ; Chloride Channels/*chemistry/genetics/immunology/*physiology ; Chlorides/*metabolism ; Crystallography, X-Ray ; Dimerization ; Escherichia coli/chemistry/metabolism ; Escherichia coli Proteins/chemistry/genetics/immunology/metabolism ; Glutamates/chemistry/metabolism ; Hydrogen Bonding ; Hydrogen-Ion Concentration ; Immunoglobulin Fab Fragments/immunology ; *Ion Channel Gating ; Models, Molecular ; Oocytes ; Patch-Clamp Techniques ; Point Mutation ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Torpedo ; Xenopus
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 108
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    Modulation of alpha-thrombin function by distinct interactions with platelet glycoprotein Ibalpha (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-12
    Description: Thrombin bound to platelets contributes to stop bleeding and, in pathological conditions, may cause vascular thrombosis. We have determined the structure of platelet glycoprotein Ibalpha (GpIbalpha) bound to thrombin at 2.3 angstrom resolution and defined two sites in GpIbalpha that bind to exosite II and exosite I of two distinct alpha-thrombin molecules, respectively. GpIbalpha occupancy may be sequential, as the site binding to alpha-thrombin exosite I appears to be cryptic in the unoccupied receptor but exposed when a first thrombin molecule is bound through exosite II. These interactions may modulate alpha-thrombin function by mediating GpIbalpha clustering and cleavage of protease-activated receptors, which promote platelet activation, while limiting fibrinogen clotting through blockade of exosite I.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Celikel, Reha -- McClintock, Richard A -- Roberts, James R -- Mendolicchio, G Loredana -- Ware, Jerry -- Varughese, Kottayil I -- Ruggeri, Zaverio M -- HL-31950/HL/NHLBI NIH HHS/ -- HL-42846/HL/NHLBI NIH HHS/ -- HL-48728/HL/NHLBI NIH HHS/ -- HL-55375/HL/NHLBI NIH HHS/ -- R01 HL042846/HL/NHLBI NIH HHS/ -- RR0833/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2003 Jul 11;301(5630):218-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Roon Research Center for Arteriosclerosis and Thrombosis, Division of Experimental Thrombosis and Hemostasis, 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/12855810" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Blood Coagulation ; Blood Platelets/chemistry/metabolism ; Crystallization ; Crystallography, X-Ray ; Fibrinogen/metabolism ; Humans ; Hydrogen Bonding ; Ligands ; Models, Molecular ; Mutation ; Platelet Aggregation ; Platelet Glycoprotein GPIb-IX Complex/*chemistry/genetics/*metabolism ; Protein Binding ; Protein Conformation ; Protein Structure, Tertiary ; Recombinant Proteins/chemistry/metabolism ; Thrombin/*chemistry/*metabolism
    Print ISSN: 0036-8075
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  • 109
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    Accumulation of phosphorylated repressor for gibberellin signaling in an F-box mutant (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-03-22
    Description: Gibberellin (GA) regulates growth and development in plants. We isolated and characterized a rice GA-insensitive dwarf mutant, gid2. The GID2 gene encodes a putative F-box protein, which interacted with the rice Skp1 homolog in a yeast two-hybrid assay. In gid2, a repressor for GA signaling, SLR1, was highly accumulated in a phosphorylated form and GA increased its concentration, whereas SLR1 was rapidly degraded by GA through ubiquitination in the wild type. We conclude that GID2 is a positive regulator of GA signaling and that regulated degradation of SLR1 is initiated through GA-dependent phosphorylation and finalized by an SCF(GID2)-proteasome pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sasaki, Akie -- Itoh, Hironori -- Gomi, Kenji -- Ueguchi-Tanaka, Miyako -- Ishiyama, Kanako -- Kobayashi, Masatomo -- Jeong, Dong-Hoon -- An, Gynheung -- Kitano, Hidemi -- Ashikari, Motoyuki -- Matsuoka, Makoto -- New York, N.Y. -- Science. 2003 Mar 21;299(5614):1896-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BioScience Center, Nagoya University, Nagoya 464-8601, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12649483" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Amino Acid Sequence ; Codon, Terminator ; Enzyme Induction ; Genes, Plant ; Gibberellins/*metabolism/pharmacology ; Ligases/metabolism ; Molecular Sequence Data ; Mutation ; Open Reading Frames ; Oryza/genetics/growth & development/*metabolism ; Peptide Hydrolases/metabolism ; Phenotype ; Phosphorylation ; Plant Proteins/chemistry/*genetics/*metabolism ; *Proteasome Endopeptidase Complex ; Protein Structure, Tertiary ; Seeds/metabolism ; *Signal Transduction ; Ubiquitin/metabolism ; Ubiquitin-Protein Ligases ; alpha-Amylases/biosynthesis
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  • 110
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    Immunology. The paracaspase connection (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Li -- Lenardo, Michael J -- New York, N.Y. -- Science. 2003 Nov 28;302(5650):1515-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14645834" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Animals ; Apoptosis ; B-Lymphocytes/*immunology/metabolism ; Caspases ; Cell Nucleus/metabolism ; Cytokines/metabolism ; Gene Expression Regulation ; I-kappa B Kinase ; Lymphocyte Activation ; Lymphoma, B-Cell, Marginal Zone/chemistry/genetics/*metabolism ; Mice ; NF-kappa B/*metabolism ; Neoplasm Proteins/chemistry/genetics/*metabolism ; Phosphorylation ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases/metabolism ; Receptors, Antigen, B-Cell/metabolism ; Receptors, Antigen, T-Cell/metabolism ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Translocation, Genetic
    Print ISSN: 0036-8075
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  • 111
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    Beta-arrestin 2 mediates endocytosis of type III TGF-beta receptor and down-regulation of its signaling (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-06
    Description: beta-Arrestins bind to activated seven transmembrane-spanning (7TMS) receptors (G protein-coupled receptors) after the receptors are phosphorylated by G protein-coupled receptor kinases (GRKs), thereby regulating their signaling and internalization. Here, we demonstrate an unexpected and analogous role of beta-arrestin 2 (betaarr2) for the single transmembrane-spanning type III transforming growth factor-beta (TGF-beta) receptor (TbetaRIII, also referred to as betaglycan). Binding of betaarr2 to TbetaRIII was also triggered by phosphorylation of the receptor on its cytoplasmic domain (likely at threonine 841). However, such phosphorylation was mediated by the type II TGF-beta receptor (TbetaRII), which is itself a kinase, rather than by a GRK. Association with betaarr2 led to internalization of both receptors and down-regulation of TGF-beta signaling. Thus, the regulatory actions of beta-arrestins are broader than previously appreciated, extending to the TGF-beta receptor family as well.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Wei -- Kirkbride, Kellye C -- How, Tam -- Nelson, Christopher D -- Mo, Jinyao -- Frederick, Joshua P -- Wang, Xiao-Fan -- Lefkowitz, Robert J -- Blobe, Gerard C -- CA 75368/CA/NCI NIH HHS/ -- CA 91816/CA/NCI NIH HHS/ -- HL 16037/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2003 Sep 5;301(5638):1394-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Duke University Medical Center, Departments of Medicine and Biochemistry, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12958365" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Arrestins/genetics/*metabolism ; Cell Line ; Cell Membrane/metabolism ; Cytoplasm/metabolism ; Down-Regulation ; *Endocytosis ; Humans ; Keratinocytes/metabolism ; Mice ; Mice, Knockout ; Molecular Sequence Data ; Mutagenesis ; Phosphorylation ; Protein Structure, Tertiary ; Protein-Serine-Threonine Kinases ; Proteoglycans/chemistry/genetics/*metabolism ; RNA, Small Interfering ; Receptors, Transforming Growth Factor beta/chemistry/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; Transfection ; Transforming Growth Factor beta ; Transforming Growth Factor beta1
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  • 112
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    A zinc clasp structure tethers Lck to T cell coreceptors CD4 and CD8 (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-09-23
    Description: The T cell coreceptors CD4 and CD8 both associate via their cytoplasmic tails with the N-terminus of the Src-family tyrosine kinase Lck. These interactions require zinc and are critical for T cell development and activation. We examined the folding and solution structures of ternary CD4-Lck-Zn2+ and CD8alpha-Lck-Zn2+ complexes. The coreceptor tails and the Lck N-terminus are unstructured in isolation but assemble in the presence of zinc to form compactly folded heterodimeric domains. The cofolded complexes have similar "zinc clasp" cores that are augmented by distinct structural elements. A dileucine motif required for clathrin-mediated endocytosis of CD4 is masked by Lck.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kim, Peter W -- Sun, Zhen-Yu J -- Blacklow, Stephen C -- Wagner, Gerhard -- Eck, Michael J -- CA080942/CA/NCI NIH HHS/ -- HL61001/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2003 Sep 19;301(5640):1725-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14500983" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Antigens, CD4/*chemistry/metabolism ; Antigens, CD8/*chemistry/metabolism ; Calorimetry ; Cytoplasm/chemistry ; Dimerization ; Dipeptides/chemistry ; Humans ; Hydrophobic and Hydrophilic Interactions ; Lymphocyte Activation ; Lymphocyte Specific Protein Tyrosine Kinase p56(lck)/*chemistry/metabolism ; Models, Molecular ; Molecular Sequence Data ; Nuclear Magnetic Resonance, Biomolecular ; Phosphorylation ; Phosphoserine/metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Sequence Alignment ; T-Lymphocytes/immunology/physiology ; Zinc/*chemistry/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 113
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    Evolution of key cell signaling and adhesion protein families predates animal origins (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-07-19
    Description: The evolution of animals from a unicellular ancestor involved many innovations. Choanoflagellates, unicellular and colonial protozoa closely related to Metazoa, provide a potential window into early animal evolution. We have found that choanoflagellates express representatives of a surprising number of cell signaling and adhesion protein families that have not previously been isolated from nonmetazoans, including cadherins, C-type lectins, several tyrosine kinases, and tyrosine kinase signaling pathway components. Choanoflagellates have a complex and dynamic tyrosine phosphoprotein profile, and cell proliferation is selectively affected by tyrosine kinase inhibitors. The expression in choanoflagellates of proteins involved in cell interactions in Metazoa demonstrates that these proteins evolved before the origin of animals and were later co-opted for development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉King, Nicole -- Hittinger, Christopher T -- Carroll, Sean B -- GM-20734/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2003 Jul 18;301(5631):361-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute (HHMI), University of Wisconsin, 1525 Linden Drive, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12869759" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bacterial Proteins/chemistry ; Biological Evolution ; Cadherins/chemistry/genetics/metabolism ; Cell Adhesion ; *Cell Adhesion Molecules/chemistry/genetics/metabolism ; Eukaryota/chemistry/*genetics/growth & development/metabolism ; *Evolution, Molecular ; Expressed Sequence Tags ; Fungal Proteins/chemistry ; Lectins, C-Type/chemistry/genetics/metabolism ; Molecular Sequence Data ; Phosphorylation ; Phosphotyrosine/metabolism ; Phylogeny ; Protein Structure, Tertiary ; *Protein-Tyrosine Kinases/chemistry/genetics/metabolism ; Proteome ; *Protozoan Proteins/chemistry/genetics/metabolism ; Sequence Alignment ; *Signal Transduction
    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)
    Location Call Number Expected Availability
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