FEATURES

FAMILY

DESCRIPTION

Also known as CCND3_HUMAN, CCND3. Regulatory component of the cyclin D3-CDK4 (DC) complex that phosphorylates and inhibits members of the retinoblastoma (RB) protein family including RB1 and regulates the cell-cycle during G(1)/S transition (PubMed:8114739). Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complex and the subsequent transcription of E2F target genes which are responsible for the progression through the G(1) phase (PubMed:8114739). Hypophosphorylates RB1 in early G(1) phase (PubMed:8114739). Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals (PubMed:8114739). Component of the ternary complex, cyclin D3/CDK4/CDKN1B, required for nuclear translocation and activity of the cyclin D-CDK4 complex (PubMed:16782892). Shows transcriptional coactivator activity with ATF5 independently of CDK4 (PubMed:15358120). Interacts with the CDK4 and CDK6 protein kinases to form a serine/threonine kinase holoenzyme complex (PubMed:9106657, PubMed:19237555, PubMed:8114739). The cyclin subunit imparts substrate specificity to the complex (PubMed:8114739). Interacts with ATF5 (PubMed:15358120). Interacts with EIF3K (PubMed:15327989). Component of the ternary complex cyclin D/CDK4/CDKN1B required for nuclear translocation and modulation of CDK4-mediated kinase activity (PubMed:16782892). Can form similar complexes with either CDKN1A or CDKN2A (PubMed:9106657, PubMed:16782892).

EXTERNAL LINKS

CCND3

G1/S-specific cyclin-D3

CCND3

Molecular Synopsis