作者:Zhaozhao Li、Anne-Cécile Ortega-Vilain、Girish S. Patil、Der-Lun Chu、J. E. Foreman、David D. Eveleth、James C. Powers
DOI:10.1021/jm950541c
日期:1996.1.1
best calpain I inhibitor in this study was Z-Leu-Nva-CONH-CH2-2-pyridyl (Ki = 19 nM). The peptide alpha-keto amide Z-Leu-Abu-CONH-(CH2)2-3-indolyl was the best inhibitor for cathepsin B (Ki = 31 nM). Some compounds acted as specific calpain inhibitors, with comparable activity on both calpains I and II and a lack of activity on cathepsin B (e.g., 40, 42, 48, 70). Others were specific inhibitors for
合成了一系列具有一般结构R1-L-Leu-D,L-AA-CONH-R2的新的二肽基α-酮酰胺,并将其评估为半胱氨酸蛋白酶钙蛋白酶I,钙蛋白酶II和组织蛋白酶B的抑制剂。它们结合在一起10个不同的N保护基(R1),P1(AA)中的3个氨基酸残基和α-酮酰胺氮(R2)上的44个不同的取代基。通常,钙蛋白酶II比钙蛋白酶I对这些抑制剂更敏感,其中许多抑制剂的离解常数(Ki)在10-100 nM之间。钙蛋白酶I也被有效地抑制,但是与钙蛋白酶II相比,抑制剂的数量较少时,观察到的Ki值非常低。在这项研究中,大多数化合物对组织蛋白酶B的抑制作用均较弱。钙蛋白酶II的最佳抑制剂是Z-Leu-Abu-CONH-CH2-CHOH-C6H5(Ki = 15 nM),Z-Leu-Abu-CONH-CH2-2-吡啶基(Ki = 17 nM)和Z-Leu-Abu-CONH-CH2-C6H3(3,5(OMe)2)(Ki