The nature of interaction between the carboxylate of substrates and the guanidinium moiety of Arg-145 in carboxypeptidase A probed by inhibitors of the enzyme
摘要:
Replacement of the alpha-proton of 2-benzyl-3-hydoroxypropanoic acid a competitive inhibitor of carboxypeptidase A with a fluoro group brought about a 2-fold increase in K-i value (0.61 mM --> 1.19 mM), while pK(a) value decreased by 1.4 units (4.36 --> 2.95), suggesting that the carboxylate of the inhibitor and that of substrates as well are hydrogen bonded to the guanidinium moiety of Arg-145 of the enzyme. Copyright (C) 1996 Elsevier Science Ltd
The nature of interaction between the carboxylate of substrates and the guanidinium moiety of Arg-145 in carboxypeptidase A probed by inhibitors of the enzyme
摘要:
Replacement of the alpha-proton of 2-benzyl-3-hydoroxypropanoic acid a competitive inhibitor of carboxypeptidase A with a fluoro group brought about a 2-fold increase in K-i value (0.61 mM --> 1.19 mM), while pK(a) value decreased by 1.4 units (4.36 --> 2.95), suggesting that the carboxylate of the inhibitor and that of substrates as well are hydrogen bonded to the guanidinium moiety of Arg-145 of the enzyme. Copyright (C) 1996 Elsevier Science Ltd
A novel class of synthetically important glycidic esters has been obtained via an asymmetric epoxidation of trans‐α‐cyano‐α,β‐unsaturated esters catalysed by a multifunctional Cinchona alkaloid‐derived thiourea/tert‐butyl hydroperoxide (TBHP) system. The glycidic esters, isolated in excellent yield with complete trans‐diastereocontrol and high enantioselectivity, proved to be versatile building blocks
The nature of interaction between the carboxylate of substrates and the guanidinium moiety of Arg-145 in carboxypeptidase A probed by inhibitors of the enzyme
作者:Dong H. Kim、Jeong- il Park
DOI:10.1016/s0960-894x(96)00541-0
日期:1996.12
Replacement of the alpha-proton of 2-benzyl-3-hydoroxypropanoic acid a competitive inhibitor of carboxypeptidase A with a fluoro group brought about a 2-fold increase in K-i value (0.61 mM --> 1.19 mM), while pK(a) value decreased by 1.4 units (4.36 --> 2.95), suggesting that the carboxylate of the inhibitor and that of substrates as well are hydrogen bonded to the guanidinium moiety of Arg-145 of the enzyme. Copyright (C) 1996 Elsevier Science Ltd