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  • Molecular Sequence Data  (3)
  • 2010-2014
  • 2000-2004  (3)
  • 2001  (3)
  • 1
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    G-protein signaling through tubby proteins (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2001-05-26
    Beschreibung: Dysfunction of the tubby protein results in maturity-onset obesity in mice. Tubby has been implicated as a transcription regulator, but details of the molecular mechanism underlying its function remain unclear. Here we show that tubby functions in signal transduction from heterotrimeric GTP-binding protein (G protein)-coupled receptors. Tubby localizes to the plasma membrane by binding phosphatidylinositol 4,5-bisphosphate through its carboxyl terminal "tubby domain." X-ray crystallography reveals the atomic-level basis of this interaction and implicates tubby domains as phosphorylated-phosphatidyl- inositol binding factors. Receptor-mediated activation of G protein alphaq (Galphaq) releases tubby from the plasma membrane through the action of phospholipase C-beta, triggering translocation of tubby to the cell nucleus. The localization of tubby-like protein 3 (TULP3) is similarly regulated. These data suggest that tubby proteins function as membrane-bound transcription regulators that translocate to the nucleus in response to phosphoinositide hydrolysis, providing a direct link between G-protein signaling and the regulation of gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Santagata, S -- Boggon, T J -- Baird, C L -- Gomez, C A -- Zhao, J -- Shan, W S -- Myszka, D G -- Shapiro, L -- New York, N.Y. -- Science. 2001 Jun 15;292(5524):2041-50. Epub 2001 May 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ruttenberg Cancer Center, Structural Biology Program, Department of Physiology and Biophysics, Mount Sinai School of Medicine of New York University, 1425 Madison Avenue New York, NY 10029, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11375483" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Active Transport, Cell Nucleus ; Adaptor Proteins, Signal Transducing ; Amino Acid Sequence ; Animals ; Cell Membrane/metabolism ; Cell Nucleus/*metabolism ; Cells, Cultured ; Crystallography, X-Ray ; GTP-Binding Protein alpha Subunits, Gq-G11 ; Gene Expression Regulation ; Heterotrimeric GTP-Binding Proteins/*metabolism ; Humans ; Isoenzymes/*metabolism ; Membrane Lipids/metabolism ; Mice ; Models, Biological ; Molecular Sequence Data ; Nuclear Localization Signals ; Obesity/genetics/metabolism ; Phosphatidylinositol 4,5-Diphosphate/*metabolism ; Phosphatidylinositol Phosphates/metabolism ; Phospholipase C beta ; Phosphorylation ; Protein Structure, Tertiary ; Proteins/chemistry/genetics/*metabolism ; Receptor, Serotonin, 5-HT2C ; Receptors, Muscarinic/metabolism ; Receptors, Serotonin/metabolism ; Recombinant Fusion Proteins/metabolism ; *Signal Transduction ; Transcription Factors/chemistry/genetics/*metabolism ; Type C Phospholipases/*metabolism
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    An iron-regulated ferric reductase associated with the absorption of dietary iron (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2001-03-07
    Beschreibung: The ability of intestinal mucosa to absorb dietary ferric iron is attributed to the presence of a brush-border membrane reductase activity that displays adaptive responses to iron status. We have isolated a complementary DNA, Dcytb (for duodenal cytochrome b), which encoded a putative plasma membrane di-heme protein in mouse duodenal mucosa. Dcytb shared between 45 and 50% similarity to the cytochrome b561 family of plasma membrane reductases, was highly expressed in the brush-border membrane of duodenal enterocytes, and induced ferric reductase activity when expressed in Xenopus oocytes and cultured cells. Duodenal expression levels of Dcytb messenger RNA and protein were regulated by changes in physiological modulators of iron absorption. Thus, Dcytb provides an important element in the iron absorption pathway.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McKie, A T -- Barrow, D -- Latunde-Dada, G O -- Rolfs, A -- Sager, G -- Mudaly, E -- Mudaly, M -- Richardson, C -- Barlow, D -- Bomford, A -- Peters, T J -- Raja, K B -- Shirali, S -- Hediger, M A -- Farzaneh, F -- Simpson, R J -- New York, N.Y. -- Science. 2001 Mar 2;291(5509):1755-9. Epub 2001 Feb 1.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Medicine, Guy's, King's and St. Thomas' School of Medicine, King's College London, Rayne Institute, Denmark Hill Campus, 123 Coldharbour Lane, London SE5 9NU, UK. andrew.t.mckie@kcl.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11230685" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Anemia/enzymology ; Animals ; Anoxia ; Cell Line ; Cloning, Molecular ; Cytochrome b Group/chemistry/genetics/*metabolism ; DNA, Complementary ; Duodenum/enzymology/*metabolism ; Enterocytes/enzymology/metabolism ; Enzyme Induction ; Ferric Compounds/*metabolism ; *Intestinal Absorption ; Intestinal Mucosa/enzymology/*metabolism ; Iron, Dietary/administration & dosage/*metabolism ; Male ; Mice ; Microvilli/enzymology/metabolism ; Molecular Sequence Data ; Nitroblue Tetrazolium/metabolism ; Oocytes ; Oxidation-Reduction ; Oxidoreductases/chemistry/genetics/*metabolism ; RNA, Messenger/genetics/metabolism ; Tetrazolium Salts/metabolism ; Thiazoles/metabolism ; *Transfection ; Up-Regulation ; Xenopus
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
  • 3
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    Cell cycle regulation of myosin-V by calcium/calmodulin-dependent protein kinase II (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publikationsdatum: 2001-08-18
    Beschreibung: Organelle transport by myosin-V is down-regulated during mitosis, presumably by myosin-V phosphorylation. We used mass spectrometry phosphopeptide mapping to show that the tail of myosin-V was phosphorylated in mitotic Xenopus egg extract on a single serine residue localized in the carboxyl-terminal organelle-binding domain. Phosphorylation resulted in the release of the motor from the organelle. The phosphorylation site matched the consensus sequence of calcium/calmodulin-dependent protein kinase II (CaMKII), and inhibitors of CaMKII prevented myosin-V release. The modulation of cargo binding by phosphorylation is likely to represent a general mechanism regulating organelle transport by myosin-V.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karcher, R L -- Roland, J T -- Zappacosta, F -- Huddleston, M J -- Annan, R S -- Carr, S A -- Gelfand, V I -- GM-52111/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2001 Aug 17;293(5533):1317-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Structural Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11509731" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Amino Acid Sequence ; Amino Acid Substitution ; Animals ; Biological Transport ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/antagonists & inhibitors/*metabolism ; Calmodulin-Binding Proteins/chemistry/genetics/*metabolism ; Cell Extracts ; Egtazic Acid/analogs & derivatives/pharmacology ; Enzyme Inhibitors/pharmacology ; Interphase ; Mass Spectrometry ; Melanophores/metabolism/ultrastructure ; Melanosomes/*metabolism ; *Mitosis ; Molecular Motor Proteins/*metabolism ; Molecular Sequence Data ; Mutation ; *Myosin Type V ; Nerve Tissue Proteins/chemistry/genetics/*metabolism ; Ovum ; Peptides/pharmacology ; Phosphopeptides/analysis/metabolism ; Phosphorylation ; Phosphoserine/metabolism ; Recombinant Fusion Proteins/metabolism ; Transfection ; Xenopus
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Publiziert von American Association for the Advancement of Science (AAAS)
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    AKTUELLE ARTIKEL
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