Synthesis and Evaluation of Peptidyl Michael Acceptors That Inactivate Human Rhinovirus 3C Protease and Inhibit Virus Replication
作者:Jian-she Kong、Shankar Venkatraman、Kelly Furness、Sanjay Nimkar、Timothy A. Shepherd、Q. May Wang、Jeffrey Aubé、Robert P. Hanzlik
DOI:10.1021/jm980114+
日期:1998.7.1
vinylogous methionine sulfone ester in place of the corresponding glutamine derivative in 1 also reduced activity substantially. Compounds 1 and 2 and several of their analogues inhibited HRV replication in cell culture by 50% at low micromolar concentrations while showing little or no evidence of cytotoxicity at 10-fold higher concentrations. Peptidyl Michael acceptors and their analogues may prove
人鼻病毒是引起普通感冒的主要原因,它含有RNA的正链,可在感染的细胞中翻译成大的多聚蛋白。后者的裂解产生复制所需的成熟病毒蛋白,大部分被病毒编码的半胱氨酸蛋白酶(3Cpro)催化,该酶对-Q近似GP-裂解位点具有高度选择性。我们合成了乙烯基谷氨酰胺或蛋氨酸砜酯的肽基衍生物(例如Boc-Val-Leu-Phe-vGln-OR:R = Me,1; R = Et,2),并将其评估为HRV-14 3C蛋白酶的抑制剂( 3Cpro)。化合物1和2以及几种相关的四肽和五肽类似物以3微摩尔IC50值迅速灭活了3Cpro。电喷雾质谱法证实了1、2和其他几种类似物对3Cpro灭活的预期1:1化学计量。化合物2也被证明可用于3Cpro的活性部位滴定,由于缺乏合适的试剂,迄今为止这是不可能的。与1、2和同类物相比,缺少P4残基的肽基迈克尔受体对3Cpro的活性大大降低或可忽略不计,这与先前针对3Cpro底物建立