期刊
PROTEIN SCIENCE
卷 19, 期 12, 页码 2418-2429出版社
WILEY
DOI: 10.1002/pro.523
关键词
apoptosis; IAP family; Smac-mimetics; oncology; cIAP1; BIR3 domain
资金
- Fondazione Cariplo [2009 2534]
Inhibitor of apoptosis proteins (IAPs) are negative regulators of apoptosis As IAPs are overexpressed in many tumors, where they confer chemoresistance, small molecules inactivating IAPs have been proposed as anticancer agents Accordingly, a number of IAP-binding proapoptotic compounds that mimic the sequence corresponding to the N-terminal tetrapeptide of Smac/DIABLO, the natural endogenous IAPs inhibitor, have been developed Here, we report the crystal structures of the BIR3 domain of cIAP1 in complex with Smac037, a Smac-mimetic known to bind potently to the XIAP-BIR3 domain and to induce degradation of cIAP1, and in complex with the novel Smac-mimetic compound Smac066 Thermal stability and fluorescence polarization assays show the stabilizing effect and the high affinity of both Smac037 and Smac066 for cIAP1- and cIAP2-BIR3 domains
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