Mdm2 p53 Binding Protein Homolog (MDM2)

HDMX; hdm2; Mouse Double Minute 2,Human Homolog Of p53-Binding Protein; Oncoprotein Mdm2

SPN	P959
HGNC	6973
MGI	96952
PubMed	15953616
RGD	1305332
UniProt	Q00987
Wiki	Mdm2

Mdm2 is an important negative regulator of the p53 tumor suppressor. It is the name of a gene as well as the protein encoded by that gene. Mdm2 protein functions both as an E3 ubiquitin ligase that recognizes the N-terminal trans-activation domain (TAD) of the p53 tumor suppressor and an inhibitor of p53 transcriptional activation.The key target of Mdm2 is the p53 tumor suppressor. Mdm2 has been identified as a p53 interacting protein that represses p53 transcriptional activity.

Mdm2 achieves this repression by binding to and blocking the N-terminal trans-activation domain of p53. Mdm2 is a p53 responsive gene—that is, its transcription can be activated by p53. Thus when p53 is stabilized, the transcription of Mdm2 is also induced, resulting in higher Mdm2 protein levels.

Reference

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