作者:Joseph P. Meara、Daniel H. Rich
DOI:10.1021/jm950445b
日期:1996.1.1
Analogs of the epoxysuccinyl peptide cysteine proteinase inhibitor, EP-475 (2a), in which the free carboxylate has been replaced by hydroxamic acid, amide, methyl ketone, hydroxyl, and ethyl ester functionalities, have been synthesized. Individual rate constants of inhibition of papain were determined for these inhibitors. The results show that a carbonyl-containing functionality is necessary for good
合成了环氧琥珀酰肽半胱氨酸蛋白酶抑制剂的类似物EP-475(2a),其中的游离羧酸盐已被异羟肟酸,酰胺,甲基酮,羟基和乙酯官能团取代。确定这些抑制剂对木瓜蛋白酶的抑制率。结果表明,含羰基的官能团对于良好的活性是必需的。确定了不可电离的EP-475(2a)类似物对木瓜蛋白酶抑制作用的pH依赖性。发现抑制作用取决于木瓜蛋白酶的两个酸性离子化(pKas分别为3.93和4.09)。讨论了环氧琥珀酰肽与木瓜蛋白酶的作用机理。