Multipolar interactions in the D pocket of thrombin: large differences between tricyclic imide and lactam inhibitors
作者:Eliane Schweizer、Anja Hoffmann-Röder、Jacob A. Olsen、Paul Seiler、Ulrike Obst-Sander、Björn Wagner、Manfred Kansy、David W. Banner、François Diederich
DOI:10.1039/b602585d
日期:——
thrombin, imides (+/-)-1-(+/-)-8 and lactams (+/-)-9-(+/-)-13, were analysed to evaluate contributions of orthogonal multipolar interactions with the backbone C=O moiety of Asn98 to the free enthalpy of protein-ligand complexation. The lactam derivatives are much more potent and more selective inhibitors (K(i) values between 0.065 and 0.005 microM, selectivity for thrombin over trypsin between 361- and 1609-fold)
分析了丝氨酸蛋白酶凝血酶的两个三环抑制剂,酰亚胺(+/-)-1-(+/-)-8和内酰胺(+/-)-9-(+/-)-13,以评估其贡献与Asn98的主链C = O部分的正交多极相互作用对蛋白质-配体络合的自由焓的影响。内酰胺衍生物比酰亚胺化合物(Ki值在0.057和23.7 microM之间,选择性更好)(K(i)值在0.065和0.005 microM之间,凝血酶对胰蛋白酶的选择性在361和1609倍之间)。凝血酶比胰蛋白酶高3到67倍)。内酰胺衍生物中额外的异丙基取代基有利地占据了凝血酶的P型口袋,从而解释了效力和选择性的提高。填充D口袋的苄基环上取代基的性质强烈影响酰亚胺系列的结合力,Ki值按以下顺序增加:F