Effect of conformational mobility and hydrogen-bonding interactions on the selectivity of some guanidinoaryl-substituted mechanism-based inhibitors of trypsin-like serine proteases
作者:Roopa Rai、John A. Katzenellenbogen
DOI:10.1021/jm00101a006
日期:1992.11
alpha-aryl-substituted iodo lactone Ib, which was previously shown to be a selective suicide substrate of urokinase and plasmin, provides an interesting comparison. The alpha-benzamido-substituted lactones 3 and 4, which afford an additional site for active-site hydrogen bonding, were found to be very potent alternate substrate inhibitors of trypsin and urokinase. In addition, the iodo lactone 4 permanently
以前,我们已经报道过一些胍基取代的α-和β-芳基烯醇内酯I和II表现为某些胰蛋白酶样蛋白酶的选择性,基于机理的抑制剂(Rai,R .; Katzenellenbogen,JAJ Med。Chem。,已提交)。在这项研究中,我们描述了一些相关的胍基取代的烯醇内酯的合成和动力学评估,这些构象具有更高的构象迁移率并在活性位点提供了额外的氢键位。α-芳基取代的内酯1和2在胍基芳基键合中的构象迁移性比I高,选择性地抑制了胰蛋白酶样酶,并且它们是α-胰凝乳蛋白酶和人嗜中性粒细胞弹性蛋白酶(HNE)相对较弱的灭活剂。碘烯醇内酯2可永久灭活胰蛋白酶,尿激酶,组织纤溶酶原激活物和纤溶酶,在与胰蛋白酶和尿激酶的相互作用中显示出异常高的特异性。由密切相关的,构象较少的移动性α-芳基取代的碘代内酯Ib表现出的选择性模式提供了有趣的比较,该位置以前被证明是尿激酶和纤溶酶的选择性自杀底物。发现提供α-苯甲酰胺基取代的