The p21 Cdk-interacting protein Cip1 is a potent inhibitor of G1 cyclin-dependent kinases - ScienceDirect
摘要:
The cyclin-dependent kinase Cdk2 associates with cyclins A, D, and E and has been implicated in the control of the G1 to S phase transition in mammals. To identify potential Cdk2 regulators, we have employed an improved two-hybrid system to isolate human genes encoding Cdk-interacting proteins (Cips). CIP1 encodes a novel 21 kd protein that is found in cyclin A, cyclin D1, cyclin E, and Cdk2 immunoprecipitates. p21CIP1 is a potent, tight-binding inhibitor of Cdks and can inhibit the phosphorylation of Rb by cyclin A-Cdk2, cyclin E-Cdk2, cyclin D1-Cdk4, and cyclin D2-Cdk4 complexes. Cotransfection experiments indicate that CIP1 and SV40 T antigen function in a mutually antagonistic manner to control cell cycle progression.
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关键词:
Humans Protein-Serine-Threonine Kinases Cyclin-Dependent Kinases CDC2-CDC28 Kinases Cyclins Retinoblastoma Protein Antigens, Polyomavirus Transforming Recombinant Proteins Protein Kinase Inhibitors Cloning, Molecular
DOI:
10.1016/0092-8674(93)90499-G
被引量:
年份:
1993














































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