a member of the highly conserved cyclin family, whose members are characterized by a dramatic periodicity in protein abundance through the cell cycle. Cyclins function as regulators of CDK kinases. Forms a complex with and functions as a regulatory subunit of CDK4 or CDK6, whose activity is required for cell cycle G1/S transition. This protein has been shown to interact with tumor suppressor protein Rb and the expression of this gene is regulated positively by Rb. Note: This description may include information from UniProtKB.
Protein type: Activator; Cell cycle regulation; Nuclear receptor co-regulator; Oncoprotein
Molecular Function: cyclin-dependent protein kinase activity; enzyme binding; histone deacetylase binding; protein binding; protein kinase binding; transcription corepressor activity; transcription factor binding
Biological Process: G1 DNA damage checkpoint; G1/S transition of mitotic cell cycle; negative regulation of transcription from RNA polymerase II promoter; positive regulation of cell cycle; positive regulation of cyclin-dependent protein kinase activity; positive regulation of protein amino acid phosphorylation; response to DNA damage stimulus; response to drug