Rational Design, Synthesis, and Crystallographic Analysis of a Hydroxyethylene-Based HIV-1 Protease Inhibitor Containing a Heterocyclic P1'-P2' Amide Bond Isostere
作者:Scott K. Thompson、Krishna H. M. Murthy、Baoguang Zhao、Evon Winborne、David W. Green、Seth M. Fisher、Renee L. DesJarlais、Thaddeus A. Jr. Tomaszek、Thomas D. Meek
DOI:10.1021/jm00045a015
日期:1994.9
factor, R (= sigma parallel Fo magnitude of/Fc parallel/sigma magnitude of), of 0.194. The inhibitor is held in the enzyme by a set of hydrophobic and polar interactions. N-3 of the imidazole ring participates in a novel hydrogen-bonding interaction with the bound water molecule, demonstrating the effectiveness of the imidazole ring as an isosteric replacement for the P1'--P2' amide bond in hydroxyethylene-based
已经完成了HIV-1蛋白酶高效抑制剂的合理设计和合成。抑制剂SB 206343基于源自MVT-101 / HIV-1蛋白酶复合物结构的模型,并包含一个4(5)-酰基咪唑环,可等位取代P1'-P2'酰胺键。 。它是一种竞争性抑制剂,在pH 6.0下的表观抑制常数为0.6 nM。已通过X射线衍射技术以2.3 A的分辨率确定了结合在HIV-1蛋白酶活性位点上的SB 206343的三维结构,并细化为晶体学差异因子R(=σ平行fo // Fc平行/ sigma值),为0.194。抑制剂通过一系列疏水和极性相互作用保持在酶中。咪唑环的N-3参与与结合的水分子的新型氢键相互作用,证明了咪唑环作为等规替代羟基乙烯基HIV-1蛋白酶中P1'-P2'酰胺键的有效性抑制剂。在咪唑环的N-1与Gly-127的羰基之间以及咪唑的酰基羰基氧与Asp-129的酰胺氮之间还存在氢键相互作用,这说明了4(5)的拟肽性质-酰