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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
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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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
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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