Anti-Cyclin D1 (Clone: ABM47F5)

Cyclin D1 (CCND1) is an important positive regulator of the G1/S phase of the cell cycle. It regulate cell cycle transition from G1 phase to S phase It is a well-established human oncogene which is frequently amplified or overexpressed in cancers (25409185). Cyclin D1b is one of two proteins translated from Cyclin D1 transcripts (isoforms a and b) that are generated due to gene polymorphism. Low Cyclin D1b expression in cervical cancer tissue, with an expression level in moderately or poorly differentiated tissues was significantly lower than that in well-differentiated tissues (25120779). Diseases associated with CCND1 include multiple myeloma and mantle cell lymphoma. Protein function: Regulatory component of the cyclin D1-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. 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. Hypophosphorylates RB1 in early G(1) phase. Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals. Also substrate for SMAD3, phosphorylating SMAD3 in a cell-cycle-dependent manner and repressing its transcriptional activity. Component of the ternary complex, cyclin D1/CDK4/CDKN1B, required for nuclear translocation and activity of the cyclin D-CDK4 complex. Exhibits transcriptional corepressor activity with INSM1 on the NEUROD1 and INS promoters in a cell cycle-independent manner. [The UniProt Consortium]