Hdm2 E3 Ligase Inhibitor

Hdm2 E3 ligase inhibitor 1 (Compound 1) is a reversible inhibitor for Hdm2 (an E3 ubiquitin ligase)-mediated ubiquitination of the p53 protein with an IC50 of 12.7 μM. Hdm2 E3 ligase inhibitor 1 binds Hdm2, blocks Hdm2-catalyzed ubiquitin transfer from preligated Ub-Ubc4 to p53, inhibits p53 ubiquitination, stabilizes p53 protein in tumor cell and exhibits antitumor efficacy[1].

[1] Lai Z, et al., Differentiation of Hdm2-mediated p53 ubiquitination and Hdm2 autoubiquitination activity by small molecular weight inhibitors. Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):14734-9. DOI:10.1073/pnas.212428599