CDK4 Antibody – Polyclonal

The protein encoded by this gene is a member of the Ser/Thr protein kinase family. This protein is highly similar to the gene products of S. cerevisiae cdc28 and S. pombe cdc2. It is a catalytic subunit of the protein kinase complex that is important for cell cycle G1 phase progression. The activity of this kinase is restricted to the G1-S phase, which is controlled by the regulatory subunits D-type cyclins and CDK inhibitor p16(INK4a). This kinase was shown to be responsible for the phosphorylation of retinoblastoma gene product (Rb). Mutations in this gene as well as in its related proteins including D-type cyclins, p16(INK4a) and Rb were all found to be associated with tumorigenesis of a variety of cancers. Multiple polyadenylation sites of this gene have been reported. [provided by RefSeq, Jul 2008]

CDK4: a protein kinase of the CDK family that is important for cell cycle G1 phase progression. Its activity is restricted to the G1-S phase. Controlled by the regulatory subunits D-type cyclins and CDK inhibitor p16(INK4a). Phosphorylates the retinoblastoma gene product (Rb). Point mutations found in somatic and familial melanoma. Amplified in sarcomas, glioma and lymphoma. Amplified, methylated or deleted in head and neck squamous cell carcinoma. Overexpression drives epithelial tumors in mice. Disruption makes mice resistant to cancer. Inhibitor: PD332991.

Protein type: Protein kinase, CMGC; EC 2.7.11.22; Protein kinase, Ser/Thr (non-receptor); Kinase, protein; Cell cycle regulation; CMGC group; CDK family; CDK/CDK4 subfamily; CDK4 subfamily

Chromosomal Location of Human Ortholog: 12q14

Cellular Component: chromatin; cyclin-dependent protein kinase holoenzyme complex; cytosol; nuclear membrane; nucleolus; nucleoplasm; nucleus; perinuclear region of cytoplasm; tight junction; transcription factor complex

Molecular Function: ATP binding; cyclin binding; cyclin-dependent protein kinase activity; cyclin-dependent protein kinase regulator activity; protein binding; protein complex binding

Biological Process: cell division; circadian rhythm; G1/S transition of mitotic cell cycle; lens development in camera-type eye; organ regeneration; positive regulation of apoptosis; positive regulation of cell cycle; positive regulation of cell proliferation; positive regulation of cell size; positive regulation of fibroblast proliferation; positive regulation of translation; protein amino acid phosphorylation; regulation of gene expression; regulation of protein kinase activity; response to drug; response to hyperoxia; response to lead ion; response to testosterone stimulus; response to toxin; signal transduction

Disease: Melanoma, Cutaneous Malignant, Susceptibility To, 3