Dimerized Linear Mimics of a Natural Cyclopeptide (TMC-95A) Are Potent Noncovalent Inhibitors of the Eukaryotic 20S Proteasome
作者:Audrey Desvergne、Emilie Genin、Xavier Maréchal、Nerea Gallastegui、Laure Dufau、Nicolas Richy、Michael Groll、Joëlle Vidal、Michèle Reboud-Ravaux
DOI:10.1021/jm4002007
日期:2013.4.25
Noncovalent proteasome inhibitors introduce an alternative mechanism of inhibition to that of covalent inhibitors used in cancer therapy. Starting from a noncovalent linear mimic of TMC-95A, a series of dimerized inhibitors using polyaminohexanoic acid spacers has been designed and optimized to target simultaneously two of the six active sites of the eukaryotic 20S proteasome. The homodimerized compounds
与癌症治疗中使用的共价抑制剂相比,非共价蛋白酶体抑制剂引入了另一种抑制机制。从TMC-95A的非共价线性模拟开始,已设计并优化了一系列使用聚氨基己酸间隔基的二聚化抑制剂,以同时靶向真核20S蛋白酶体的六个活性位点中的两个。均二聚的化合物可有效抑制胰凝乳蛋白酶样(K i= 6-11 nM)和类胰蛋白酶的活性,而后酸活性的修饰较差。通过与酵母20S蛋白酶体复合的抑制剂的X射线晶体学确定非共价结合模式。评价了对人细胞中蛋白酶体活性的抑制。多价抑制剂概念的使用产生了高效且选择性的非共价化合物(不抑制钙蛋白酶和组织蛋白酶),与共价结合剂如硼替佐米和卡非佐米相比具有潜在的治疗优势。