A Slow, Tight Binding Inhibitor of InhA, the Enoyl-Acyl Carrier Protein Reductase from Mycobacterium tuberculosis
作者:Sylvia R. Luckner、Nina Liu、Christopher W. am Ende、Peter J. Tonge、Caroline Kisker
DOI:10.1074/jbc.m109.090373
日期:2010.5
diphenyl ethers with nanomolar affinity for InhA. However, these compounds are rapid reversible inhibitors of the enzyme, and based on the knowledge that long drug target residence times are an important factor for in vivo drug activity, we set out to generate a slow onset inhibitor of InhA using structure-based drug design. 2-(o-Tolyloxy)-5-hexylphenol (PT70) is a slow, tight binding inhibitor of InhA
结核分枝杆菌中的烯醇ACP还原酶InhA是开发新型抗结核药物的诱人靶标,该疾病每年导致超过200万人死亡。InhA是目前用于治疗肺部感染的一线药物异烟肼的靶标。直接靶向InhA且不需要被分枝杆菌过氧化氢酶-过氧化物酶KatG激活的化合物是用于治疗由异烟肼耐药菌株引起的感染的有前途的候选药物。以前我们报道了几种对InhA具有纳摩尔亲和力的二苯醚的合成。但是,这些化合物是该酶的快速可逆抑制剂,并且基于以下认识:较长的药物靶标停留时间是体内药物活性的重要因素,我们着手使用基于结构的药物设计产生一种缓慢发作的InhA抑制剂。2-(邻甲苯氧基)-5-己基酚(PT70)是InhA的一种缓慢,紧密结合的抑制剂,K(1)值为22 pm。PT70优先结合InhA x NAD(+)复合物,在靶标上的停留时间为24分钟,比其衍生的快速可逆抑制剂的停留时间长14,000倍。InhA,NAD(+)和PT70之间的三元复合物的1