申请人:——
公开号:US20020128434A1
公开(公告)日:2002-09-12
Cysteine protease inhibitors which deactivate the protease by covalently bonding to the cysteine protease and releasing the enolate of a 1,3-dicarbonyl (or its enolic form). The cysteine protease inhibitors of the present invention accordingly comprise a first portion which targets a desired cysteine protease and positions the inhibitor near the thiolate anion portion of the active site of the protease, and a second portion which covalently bonds to the cysteine protease and irreversibly deactivates that protease by providing a carbonyl or carbonyl-equivalent which is attacked by the thiolate anion of the active site of the cysteine protease to sequentially cleave a &bgr;-dicarbonyl enol ether leaving group.
半胱氨酸蛋白酶抑制剂通过共价键结合半胱氨酸蛋白酶并释放1,3-二羰基(或其烯醇形式)的烯醇酸使蛋白酶失活。因此,本发明的半胱氨酸蛋白酶抑制剂包括第一部分,该部分针对所需的半胱氨酸蛋白酶并将抑制剂定位于蛋白酶活性位点的巯基阴离子部分附近,以及第二部分,该部分与半胱氨酸蛋白酶共价键结合,并通过提供被半胱氨酸蛋白酶活性位点上的巯基阴离子攻击的羰基或羰基等效物,不可逆地使该蛋白酶失活,以顺序裂解β-二羰基烯醇醚离基。