Oncoprotein MDM2, a major ubiquitin E3 ligase of tumor suppressor p53; overexpression of MDM2 in human cancers is associated with a poor prognosis.
- A gene that encodes a protein involved in the regulation of the p53 tumor suppressor. The p53 protein plays a crucial role in controlling cell cycle progression, DNA repair, and apoptosis (programmed cell death). MDM2 functions primarily as an E3 ubiquitin ligase, which means it tags p53 for degradation, thereby regulating its levels in the cell.
-MDM2 is often overexpressed in various tumors, leading to the inhibition of p53 activity. This can result in uncontrolled cell proliferation, evasion of apoptosis, and increased genomic instability, all of which contribute to tumorigenesis.
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