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  • 1
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    Formation and activation of a cyclin E-cdk2 complex during the G1 phase of the human cell cycle (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-09-18
    Description: Human cyclin E, originally identified on the basis of its ability to function as a G1 cyclin in budding yeast, associated with a cell cycle-regulated protein kinase in human cells. The cyclin E-associated kinase activity peaked during G1, before the appearance of cyclin A, and was diminished during exit from the cell cycle after differentiation or serum withdrawal. The major cyclin E-associated kinase in human cells was Cdk2 (cyclin-dependent kinase 2). The abundance of the cyclin E protein and the cyclin E-Cdk2 complex was maximal in G1 cells. These results provide further evidence that in all eukaryotes assembly of a cyclin-Cdk complex is an important step in the biochemical pathway that controls cell proliferation during G1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koff, A -- Giordano, A -- Desai, D -- Yamashita, K -- Harper, J W -- Elledge, S -- Nishimoto, T -- Morgan, D O -- Franza, B R -- Roberts, J M -- New York, N.Y. -- Science. 1992 Sep 18;257(5077):1689-94.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1388288" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes/metabolism ; *CDC2-CDC28 Kinases ; Cell Line ; Cyclin-Dependent Kinase 2 ; *Cyclin-Dependent Kinases ; Cyclins/*metabolism ; Flow Cytometry ; G1 Phase/*physiology ; Humans ; Immunoblotting ; Immunosorbent Techniques ; Protein Kinases/*metabolism ; *Protein-Serine-Threonine Kinases ; Rats
    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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    Negative regulation of G1 in mammalian cells: inhibition of cyclin E-dependent kinase by TGF-beta (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-04-23
    Description: Transforming growth factor-beta (TGF-beta) is a naturally occurring growth inhibitory polypeptide that arrests the cell cycle in middle to late G1 phase. Cells treated with TGF-beta contained normal amounts of cyclin E and cyclin-dependent protein kinase 2 (Cdk2) but failed to stably assemble cyclin E-Cdk2 complexes or accumulate cyclin E-associated kinase activity. Moreover, G1 phase extracts from TGF-beta-treated cells did not support activation of endogenous cyclin-dependent protein kinases by exogenous cyclins. These effects of TGF-beta, which correlated with the inhibition of retinoblastoma protein phosphorylation, suggest that mammalian G1 cyclin-dependent kinases, like their counterparts in yeast, are targets for negative regulators of the cell cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koff, A -- Ohtsuki, M -- Polyak, K -- Roberts, J M -- Massague, J -- New York, N.Y. -- Science. 1993 Apr 23;260(5107):536-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA 98104.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8475385" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *CDC2-CDC28 Kinases ; Cell Extracts ; Cell Line ; Cyclin-Dependent Kinase 2 ; *Cyclin-Dependent Kinases ; Cyclins/*metabolism/pharmacology ; Enzyme Activation/drug effects ; *G1 Phase ; Mink ; Phosphorylation ; Protein Kinases/*metabolism ; *Protein-Serine-Threonine Kinases ; Retinoblastoma Protein/metabolism ; Transforming Growth Factor beta/*pharmacology
    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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  • 3
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    A link between cyclin A expression and adhesion-dependent cell cycle progression (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-12-03
    Description: Cell adhesion has an essential role in regulating proliferation during the G1 phase of the cell cycle, and loss of this adhesion requirement is a classic feature of oncogenic transformation. The appearance of cyclin A messenger RNA and protein in late G1 was dependent on cell adhesion in both NRK and NIH 3T3 fibroblasts. In contrast, the expression of Cdc2, Cdk2, cyclin D1, and cyclin E was independent of adhesion in both cell lines. Transfection of NRK cells with a cyclin A complementary DNA resulted in adhesion-independent accumulation of cyclin A protein and cyclin A-associated kinase activity. These transfected cells also entered S phase and complete multiple rounds of cell division in the absence of cell adhesion. Thus, cyclin A is a target of the adhesion-dependent signals that control cell proliferation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guadagno, T M -- Ohtsubo, M -- Roberts, J M -- Assoian, R K -- GM48224/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1993 Dec 3;262(5139):1572-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8248807" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; CDC2 Protein Kinase/biosynthesis ; *CDC2-CDC28 Kinases ; Cell Adhesion/*physiology ; Cell Cycle/*physiology ; Cell Line ; Cyclin-Dependent Kinase 2 ; *Cyclin-Dependent Kinases ; Cyclins/*biosynthesis ; Fibroblasts/cytology/metabolism ; Gene Expression Regulation ; Humans ; Mice ; Protein Kinases/biosynthesis ; *Protein-Serine-Threonine Kinases ; Rats ; 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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