Synthesis, biological evaluation and molecular modelling of N-heterocyclic dipeptide aldehydes as selective calpain inhibitors
作者:Matthew A. Jones、James D. Morton、James M. Coxon、Stephen B. McNabb、Hannah Y.-Y. Lee、Steven G. Aitken、Janna M. Mehrtens、Lucinda J.G. Robertson、Axel T. Neffe、Shigeru Miyamoto、Roy Bickerstaffe、Karl Gately、Jacqueline M. Wood、Andrew D. Abell
DOI:10.1016/j.bmc.2008.05.048
日期:2008.7
A series of N-heterocyclic dipeptide aldehydes 4-13 have been synthesised and evaluated as inhibitors of ovine calpain 1 (o-CAPN1) and ovine calpain 2 (o-CAPN2). 5-Formyl-pyrrole 9 (IC(50) values of 290 and 25nM against o-CAPN1 and o-CAPN2, respectively) was the most potent and selective o-CAPN2 inhibitor, displaying >11-fold selectivity. The amino acid sequences of o-CAPN1 and o-CAPN2 have been determined
已经合成了一系列的N-杂环二肽醛4-13,并作为绵羊钙蛋白酶1(o-CAPN1)和绵羊钙蛋白酶2(o-CAPN2)的抑制剂进行了评估。5-甲酰基-吡咯9(对o-CAPN1和o-CAPN2的IC(50)值分别为290和25nM)是最有效和最具选择性的o-CAPN2抑制剂,显示出> 11倍的选择性。已经确定了o-CAPN1和o-CAPN2的氨基酸序列。由于缺乏关于绵羊钙蛋白酶的结构信息,因此基于人钙蛋白酶1(h-CAPN1)X射线晶体结构(o-CAPN1和o-CAPN2)的活性位点裂开了计算机同源模型(PDB代码) 1ZCM)。这些模型用于合理化所观察到的化合物4-13的SAR和观察到的9的选择性。