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Regulation of CDK4

Author(s): Bockstaele Laurence | Coulonval Katia | Kooken Hugues | Paternot Sabine | Roger Pierre

Journal: Cell Division
ISSN 1747-1028

Volume: 1;
Issue: 1;
Start page: 25;
Date: 2006;
Original page

Abstract Cyclin-dependent kinase (CDK)4 is a master integrator that couples mitogenic and antimitogenic extracellular signals with the cell cycle. It is also crucial for many oncogenic transformation processes. In this overview, we address various molecular features of CDK4 activation that are critical but remain poorly known or debated, including the regulation of its association with D-type cyclins, its subcellular location, its activating Thr172-phosphorylation and the roles of Cip/Kip CDK "inhibitors" in these processes. We have recently identified the T-loop phosphorylation of CDK4, but not of CDK6, as a determining target for cell cycle control by extracellular factors, indicating that CDK4-activating kinase(s) might have to be reconsidered.
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