由光学纯的N-(叔丁氧羰基)-4-氨基-3-羟基-6-甲基庚酸(Boc-Sta)合成羧基蛋白酶抑制剂胃蛋白酶抑制素的类似物,胃蛋白酶和肾素的抑制作用为决心。另外,合成了新的氨基酸(3S,4S)-4-氨基-3-羟基-5-苯基戊酸[AHPPA],并建立了3和4位的立体化学。三肽异戊酰基-L-戊酰基-(3S,4S)-4-氨基-3-羟基-6-甲基庚酰基-L-丙氨酸异戊酰胺[Iva-Val-(3S,4S)-Sta-Ala-NHiC5H11]和Iva-发现Val-(3S,4S)-AHPPA-Ala-NHiC5H11是胃蛋白酶的有效抑制剂,Ki分别为1 x 10(-9)和0.9 x 10(-9)M。将(3S)-羟基的手性更改为3R或缩短肽链可减少与胃蛋白酶的结合力100倍以上。
Design and Synthesis of Unsymmetrical Peptidyl Urea Inhibitors of Aspartic Peptidases
作者:Natalie A. Dales、Regine S. Bohacek、Kenneth A. Satyshur、Daniel H. Rich
DOI:10.1021/ol0160912
日期:2001.7.1
synthesis, and enzyme inhibition of a new class of aspartic peptidase inhibitors is described. Unsymmetrical ureas were designed from computer-generated structures. Using mechanism-based and substrate-based design techniques, potent pepsin inhibitors were developed and the binding mode was established. Two X-ray crystal structures of enzyme-bound inhibitors revealed a new binding mode that is closely related