Synthesis andIn Vitro Evaluation of 2-Aminoquinazolin-4(3H)-one-Based Inhibitors for tRNA-Guanine Transglycosylase (TGT)
作者:Emmanuel A. Meyer、Maya Furler、François Diederich、Ruth Brenk、Gerhard Klebe
DOI:10.1002/hlca.200490122
日期:2004.6
tRNA-Guaninetransglycosylase (TGT) plays a key role in the post-transcriptional modification of tRNA. It has been linked with the pathogenicity of shigellae, the causative agents of bacillary dysentery (shigellosis). Here, we report structureactivity relationships (SARs) for a new series of 2-aminoquinazolin-4(3H)-one-basedinhibitors of TGT, resulting from structure-based design (Fig. 2). Versatile
tRNA鸟嘌呤转糖基酶(TGT)在tRNA的转录后修饰中起关键作用。它与志贺氏菌的致病性有关,志贺氏菌是细菌性痢疾(志贺氏菌病)的病原体。在这里,我们报告了基于结构设计的一系列新的基于2-氨基喹唑啉-4(3 H)-one的TGT抑制剂的结构活性关系(SAR)(图2)。通用的合成方案允许2-氨基喹唑啉-4(3 H)-一个核心的选择性功能化(方案1 – 6)在第6位具有H键供体基团(用于将H键结合到Leu231的C = O基团上),在第8位具有亲脂性残基,可以进入一个浅的新发现的由Val282,Val45和Leu68排列的亲脂性口袋。通过晶体结构分析确定了这些配体中几种在TGT活性位点的结合模式(图4和6)。观察到了显着的S效应,抑制剂1c(K i = 100 nM)的抑制剂8c的(苯硫基)甲基残基中的S原子被O原子取代(在1h内,K i = 5.6μM)或CH 2(在1i中,K i=3.6μ