NCIt definition : Cyclin-dependent kinase 4 (303 aa, 34 kDa) is encoded by the human CDK4 gene. This
protein may be involved in cell cycle regulation.;
NCIt note : A serine/threonine protein kinase involved in cell cycle control, Cdk4 may complex
with D-type G1 Cyclins and belongs to the CDC2/CDKX subfamily. CDK4/CDK6 phosphorylates
Rb in early G1, displacing histone deacetylase and blocking transcriptional repression.
CDK4 is inhibited by p16 (Cyclin-Dependent Kinase Inhibitor-2).;