The cell cycle inhibitor p21CIP is phosphorylated by cyclin A-CDK2 complexes

Biochemical and Biophysical Research Communications
M JaumotO Bachs

Abstract

We report here experimental evidence indicating that the p21CIP, the universal inhibitor of cyclin-dependent protein kinases, general inhibitor CDKs is a substrate oof cyclin A-cdk2. The evidence comes from phosphorylation experiments in which the endogenous p21CIP present in using the original cyclin A-cdk2 complexes immunoprecipitated from HeLa cells extracts can be phosphorylated by the cdk2 of the same complexes. In vitro experiments showing that reconstituted GSTcyclin A-GSTcdk2 complexes from phosphorylate recombinant GSTp21CIP confirms that p21CIP is a cyclin A-cdk2 substrate.

Citations

Mar 31, 2005·Molecular and Cellular Biology·Bipin C Dash, Wafik S El-Deiry
Feb 18, 2011·American Journal of Physiology. Renal Physiology·Rawad HodeifyPeter M Price
Dec 5, 2013·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·T BriocheJ Viña
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