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  • 1
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    RGS-PX1, a GAP for GalphaS and sorting nexin in vesicular trafficking (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-12-01
    Description: Heterotrimeric GTP-binding proteins (G proteins) control cellular functions by transducing signals from the outside to the inside of cells. Regulator of G protein signaling (RGS) proteins are key modulators of the amplitude and duration of G protein-mediated signaling through their ability to serve as guanosine triphosphatase-activating proteins (GAPs). We have identified RGS-PX1, a Galpha(s)-specific GAP. The RGS domain of RGS-PX1 specifically interacted with Galpha(s), accelerated its GTP hydrolysis, and attenuated Galpha(s)-mediated signaling. RGS-PX1 also contains a Phox (PX) domain that resembles those in sorting nexin (SNX) proteins. Expression of RGS-PX1 delayed lysosomal degradation of the EGF receptor. Because of its bifunctional role as both a GAP and a SNX, RGS-PX1 may link heterotrimeric G protein signaling and vesicular trafficking.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zheng, B -- Ma, Y C -- Ostrom, R S -- Lavoie, C -- Gill, G N -- Insel, P A -- Huang, X Y -- Farquhar, M G -- AG14563/AG/NIA NIH HHS/ -- CA58689/CA/NCI NIH HHS/ -- DK17780/DK/NIDDK NIH HHS/ -- GM56904/GM/NIGMS NIH HHS/ -- HL53773/HL/NHLBI NIH HHS/ -- HL63885/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 2001 Nov 30;294(5548):1939-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA 92093-0651, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11729322" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenergic beta-2 Receptor Agonists ; Amino Acid Sequence ; Animals ; COS Cells ; Carrier Proteins/chemistry/*metabolism ; Cattle ; Cell Line ; Cyclic AMP/metabolism ; Endosomes/chemistry/metabolism ; GTP-Binding Protein alpha Subunits, Gs/antagonists & inhibitors/*metabolism ; GTPase-Activating Proteins/chemistry/*metabolism ; Guanosine Triphosphate/metabolism ; Humans ; Mitogen-Activated Protein Kinases/metabolism ; Molecular Sequence Data ; Protein Binding ; Protein Interaction Mapping ; Protein Structure, Tertiary ; Protein Transport ; RGS Proteins/chemistry/*metabolism ; Receptor, Epidermal Growth Factor/metabolism ; Receptors, Adrenergic, beta-2/genetics/metabolism ; Sequence Alignment ; Signal Transduction ; Sorting Nexins ; Substrate Specificity ; *Vesicular Transport Proteins
    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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  • 2
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    A pit stop at the ER (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-03-02
    Description: Although ligand activation of receptor signaling is well understood, less is known about how a cell switches off signaling by the activated receptor. In his Perspective, Gill discusses new work (Haj et al.) that visualizes one step in the process of deactivating a ligand-activated receptor tyrosine kinase--the dephosphorylation of the internalized receptor by a phosphatase in the endoplasmic reticulum.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gill, Gordon N -- New York, N.Y. -- Science. 2002 Mar 1;295(5560):1654-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of California, San Diego, La Jolla, CA 92093-0650, USA. ggill@ucsd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11872824" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/enzymology ; Endocytosis ; Endoplasmic Reticulum/*enzymology ; Endosomes/enzymology/metabolism ; Energy Transfer ; Fluorescence ; Ligands ; Lysosomes/metabolism ; Mice ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphorylation ; Protein Transport ; Protein Tyrosine Phosphatase, Non-Receptor Type 1 ; Protein Tyrosine Phosphatases/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-cbl ; Receptor Protein-Tyrosine Kinases/chemistry/*metabolism ; Receptor, Epidermal Growth Factor/chemistry/*metabolism ; Receptors, Platelet-Derived Growth Factor/chemistry/*metabolism ; Ubiquitin/metabolism ; *Ubiquitin-Protein Ligases
    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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    Ligand-induced transformation by a noninternalizing epidermal growth factor receptor (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-02-23
    Description: Identification of a mutant epidermal growth factor (EGF) receptor that does not undergo downregulation has provided a genetic probe to investigate the role of internalization in ligand-induced mitogenesis. Contact-inhibited cells expressing this internalization-defective receptor exhibited a normal mitogenic response at significantly lower ligand concentrations than did cells expressing wild-type receptors. A transformed phenotype and anchorage-independent growth were observed at ligand concentrations that failed to elicit these responses in cells expressing wild-type receptors. These findings imply that activation of the protein tyrosine kinase activity at the cell membrane is sufficient for the growth-enhancing effects of EGF. Thus, downregulation can serve as an attenuation mechanism, without which transformation ensues.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wells, A -- Welsh, J B -- Lazar, C S -- Wiley, H S -- Gill, G N -- Rosenfeld, M G -- DDK 13149/DK/NIDDK NIH HHS/ -- DDK 18477/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1990 Feb 23;247(4945):962-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of California-San Diego, La Jolla 92093.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2305263" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Division ; Cell Line ; Down-Regulation ; *Endocytosis ; Enzyme Activation ; Epidermal Growth Factor/pharmacology ; Genetic Vectors ; Moloney murine leukemia virus/genetics ; Mutation ; Phenotype ; Protein-Tyrosine Kinases/metabolism ; Receptor, Epidermal Growth Factor/genetics/*metabolism ; Transfection
    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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    Small CTD phosphatases function in silencing neuronal gene expression (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-02-01
    Description: Neuronal gene transcription is repressed in non-neuronal cells by the repressor element 1 (RE-1)-silencing transcription factor/neuron-restrictive silencer factor (REST/NRSF) complex. To understand how this silencing is achieved, we examined a family of class-C RNA polymerase II (RNAPII) carboxyl-terminal domain (CTD) phosphatases [small CTD phosphatases (SCPs) 1 to 3], whose expression is restricted to non-neuronal tissues. We show that REST/NRSF recruits SCPs to neuronal genes that contain RE-1 elements, leading to neuronal gene silencing in non-neuronal cells. Phosphatase-inactive forms of SCP interfere with REST/NRSF function and promote neuronal differentiation of P19 stem cells. Likewise, small interfering RNA directed to the single Drosophila SCP unmasks neuronal gene expression in S2 cells. Thus, SCP activity is an evolutionarily conserved transcriptional regulator that acts globally to silence neuronal genes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yeo, Michele -- Lee, Soo-Kyung -- Lee, Bora -- Ruiz, Esmeralda C -- Pfaff, Samuel L -- Gill, Gordon N -- DK13149/DK/NIDDK NIH HHS/ -- NS37116/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2005 Jan 28;307(5709):596-600.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15681389" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basic Helix-Loop-Helix Transcription Factors ; Cell Differentiation ; Cell Line ; Chromatin Immunoprecipitation ; DNA-Binding Proteins/metabolism ; Down-Regulation ; Drosophila/genetics/metabolism ; Drosophila Proteins/genetics/metabolism ; Gene Expression Profiling ; Gene Expression Regulation ; *Gene Silencing ; Humans ; In Situ Hybridization ; Mice ; Nerve Tissue Proteins/metabolism ; Neurons/cytology/*physiology ; Nuclear Proteins ; Phosphoprotein Phosphatases/genetics/*metabolism ; Phosphorylation ; RNA Interference ; Regulatory Sequences, Nucleic Acid ; Repressor Proteins/*metabolism ; TCF Transcription Factors ; Transcription Factor 7-Like 1 Protein ; Transcription Factors/*metabolism ; Tretinoin/pharmacology
    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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    Enhanced degradation of EGF receptors by a sorting nexin, SNX1 (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-05-17
    Description: The vectorial movement of proteins requires specific recognition by components of the vesicular trafficking machinery. A protein, sorting nexin-1 (SNX1), was identified in a human cell line that bound to a region of the epidermal growth factor receptor (EGFR) containing the lysosomal targeting code. SNX1 contains a region of homology to a yeast vacuolar sorting protein, and overexpression of SNX1 decreased the amount of EGFR on the cell surface as a result of enhanced rates of constitutive and ligand-induced degradation. Thus, SNX1 is likely to play a role in sorting EGFR to lysosomes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kurten, R C -- Cadena, D L -- Gill, G N -- CA58689/CA/NCI NIH HHS/ -- F32DK08666/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1996 May 17;272(5264):1008-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of California, San Diego, La Jolla 92093-0650, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8638121" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Carrier Proteins/chemistry/genetics/*metabolism ; Cell Line ; Cell Membrane/*metabolism ; Down-Regulation ; Endocytosis ; Epidermal Growth Factor/pharmacology ; HeLa Cells ; Humans ; Ligands ; Lysosomes/*metabolism ; Molecular Sequence Data ; Molecular Weight ; Receptor, Epidermal Growth Factor/*metabolism ; Transfection ; *Vesicular Transport 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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  • 6
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    Expression cloning of human EGF receptor complementary DNA: gene amplification and three related messenger RNA products in A431 cells (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-05-25
    Description: In order to further define the mechanisms by which polypeptide growth factors regulate gene transcription and cellular growth, expression cloning techniques were used to select human epidermal growth factor (EGF) receptor complementary DNA clones. The EGF 3' coding domain shows striking homology to the transforming gene product of avian erythroblastosis virus (v-erbB). Over-expression of EGF receptors in A431 cell lines correlates with increased EGF receptor mRNA levels and amplification (up to 110 times) of the apparently singular EGF receptor gene. There appear to be three cytoplasmic polyadenylated RNA products of EGF receptor gene expression in A431 cells, one of which contains only 5' (EGF binding domain) sequences and is postulated to encode the secreted EGF receptor-related protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lin, C R -- Chen, W S -- Kruiger, W -- Stolarsky, L S -- Weber, W -- Evans, R M -- Verma, I M -- Gill, G N -- Rosenfeld, M G -- New York, N.Y. -- Science. 1984 May 25;224(4651):843-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6326261" target="_blank"〉PubMed〈/a〉
    Keywords: Base Sequence ; Cell Line ; Cloning, Molecular ; DNA/*genetics ; Gene Amplification ; Gene Expression Regulation ; Polymorphism, Genetic ; RNA, Messenger/genetics ; Receptor, Epidermal Growth Factor ; Receptors, Cell Surface/*genetics
    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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    Loss of division potential in culture: aging or differentiation? (1980)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1980-06-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hornsby, P J -- Gill, G N -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1482-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384793" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenal Cortex/physiology ; *Aging ; *Cell Differentiation ; *Cell Division ; Cells, Cultured ; Fibroblasts/physiology ; Humans ; Life Expectancy
    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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  • 8
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    Production of an epidermal growth factor receptor-related protein (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-04-20
    Description: Human epidermoid carcinoma A431 cells in culture produce a soluble 105-kilodalton protein which, by the criteria of epidermal growth factor (EGF) binding, recognition by monoclonal and polyclonal antibodies to the EGF receptor, amino-terminal sequence analysis and carbohydrate content, is related to the cell surface domain of the EGF receptor. The high rate of production and the finding that with biosynthetic labeling the specific activity of this 105-kilodalton protein exceeds that of the intact receptor indicate that it is not derived from membrane-bound mature receptor but is separately produced by the cell. These cells thus separately synthesize an EGF receptor that is inserted into the membrane and an EGF receptor-related protein that is secreted.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weber, W -- Gill, G N -- Spiess, J -- AM13149/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1984 Apr 20;224(4646):294-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6324343" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Antibodies, Monoclonal/immunology ; Carbohydrates/analysis ; Carcinoma, Squamous Cell/*metabolism ; Cell Line ; Epidermal Growth Factor/metabolism ; Glycoproteins/analysis/*biosynthesis ; Humans ; Kinetics ; Molecular Weight ; Receptor, Epidermal Growth Factor ; Receptors, Cell Surface/analysis/immunology/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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  • 9
    Electronic Resource
    Electronic Resource
    Coexpression of both .alpha. and .beta. subunits is required for assembly of regulated casein kinase II (1991)
    s.l. : American Chemical Society
    Biochemistry 30 (1991), S. 11133-11140 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00110a016
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    Paper (German National Licenses)
    Fulltext
  • 10
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    Structural features that specify tyrosine kinase activity deduced from homology modeling of the epidermal growth factor receptor. (1993)
    National Academy of Sciences
    Details
    Publication Date: 1993-06-01
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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