p16INK4a Mouse Monoclonal Antibody [A4A5] (HA600026)

UNIPROT #

P42771

PROTEIN NAME

p16INK4a

SYNONYMS

ARF antibody;CDK4 inhibitor p16 INK4 antibody;CDK4I antibody;CDKN2 antibody;CDKN2A antibody;Cell cycle negative regulator beta antibody;CMM2 antibody;Cyclin dependent kinase 4 inhibitor A antibody;Cyclin dependent kinase inhibitor 2A antibody;INK4 antibody;INK4a antibody;Melanoma p16 inhibits CDK4 antibody;MLM antibody;MTS 1 antibody;MTS1 antibody;Multiple tumor suppressor 1 antibody;p16 antibody;p16 INK4a antibody;p16INK4a antibody;p19 antibody;P19ARF antibody;TP16 antibody

SUBCELLULAR LOCATION

Cytoplasm, Nucleus.

FUNCTION

This gene generates several transcript variants which differ in their first exons. At least three alternatively spliced variants encoding distinct proteins have been reported, two of which encode structurally related isoforms known to function as inhibitors of CDK4 kinase. The remaining transcript includes an alternate first exon located 20 Kb upstream of the remainder of the gene; this transcript contains an alternate open reading frame (ARF) that specifies a protein which is structurally unrelated to the products of the other variants. This ARF product functions as a stabilizer of the tumor suppressor protein p53 as it can interact with, and sequester, the E3 ubiquitin-protein ligase MDM2, a protein responsible for the degradation of p53. In spite of the structural and functional differences, the CDK inhibitor isoforms and the ARF product encoded by this gene, through the regulatory roles of CDK4 and p53 in cell cycle G1 progression, share a common functionality in cell cycle G1 control. This gene is frequently mutated or deleted in a wide variety of tumors, and is known to be an important tumor suppressor gene.