Inhibition of the Mycobacterium tuberculosis enoyl acyl carrier protein reductase InhA by arylamides
作者:Xin He、Akram Alian、Paul R. Ortiz de Montellano
DOI:10.1016/j.bmc.2007.08.013
日期:2007.11
drug-resistant clinical isolates. The crystal structure of InhA complexed with one representative inhibitor reveals the binding mode of the inhibitor within the InhA active site. Further optimization through a microtiter synthesis strategy followed by in situ activity screening led to the discovery of a potent InhA inhibitor with in vitro IC(50)=90 nM, representing a 34-fold potency improvement over the lead compound
InhA是结核分枝杆菌的烯酰基酰基载体蛋白还原酶(ENR),是参与结核分枝杆菌II型脂肪酸生物合成途径的关键酶之一。我们在此报告通过高通量筛选发现的一系列芳基酰胺,它们是一类新型的有效InhA抑制剂。这些直接的InhA抑制剂不需要分枝杆菌的酶促活化作用,因此可以规避对耐药结核前药(如INH和ETA)的耐药机制,这种机制在耐药性临床分离株中最常见。与一种代表性抑制剂复合的InhA的晶体结构揭示了该抑制剂在InhA活性位点内的结合模式。