Anti-Cyclin D1 antibody [rCCND1/4752]

Target data

Function

The protein expressed by the CCND1 gene acts as a regulatory component of the cyclin D1-CDK4 (DC) complex, which phosphorylates and inhibits retinoblastoma (RB) protein family members, including RB1, regulating the cell cycle during the G(1)/S transition. Phosphorylation of RB1 allows the transcription factor E2F to dissociate from the RB/E2F complex, enabling transcription of E2F target genes responsible for G(1) phase progression. In early G(1) phase, it hypophosphorylates RB1. Cyclin D-CDK4 complexes integrate various mitogenic and antimitogenic signals. The protein also serves as a substrate for SMAD3, phosphorylating it in a cell-cycle-dependent manner to repress its transcriptional activity, and forms part of the cyclin D1/CDK4/CDKN1B complex necessary for nuclear translocation and activity. Additionally, it exhibits transcriptional corepressor activity with INSM1 on the NEUROD1 and INS promoters, independent of the cell cycle. This supplementary information is collated from multiple sources and compiled automatically.