Covalent modification of the oncogene product Mdm2 by the ubiquitin-related protein SUMO1 protects it from ubiquitination and enhances its E3 ligase activity towards p53 in vitro. Disappearance of ...
These proteins, called MDM2 and MDMX, become overactive in cancer and break down p53. Researchers have developed drugs to block MDM2 or MDMX, but targeting just one of these proteins is often not ...
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