Rational Design of Selective and Bioactive Inhibitors of the <i>Mycobacterium tuberculosis</i> Proteasome
作者:Kyle A. Totaro、Dominik Barthelme、Peter T. Simpson、Xiuju Jiang、Gang Lin、Carl F. Nathan、Robert T. Sauer、Jason K. Sello
DOI:10.1021/acsinfecdis.6b00172
日期:2017.2.10
The 20S core particle of the proteasome in Mycobacterium tuberculosis (Mtb) is a promising, yet unconventional, drug target. This multimeric peptidase is not essential, yet degrades proteins that have become damaged and toxic via reactions with nitric oxide (and/or the associated reactive nitrogen intermediates) produced during the host immune response. Proteasome inhibitors could render Mtb susceptible
结核分枝杆菌(Mtb)中蛋白酶体的20S核心颗粒是有前途的但非常规的药物靶标。该多聚体肽酶不是必需的,而是通过与宿主免疫应答过程中产生的一氧化氮(和/或相关的反应性氮中间体)反应,降解已受损且有毒的蛋白质。蛋白酶体抑制剂可以使Mtb对免疫系统敏感,但只有在不抑制人类必需的20S对应物的情况下,它们才在治疗上可行。Mtb的选择性抑制剂设计和合成20S是基于其独特的底物偏好和模仿丁香脂素的真核蛋白酶体的模拟底物的共价抑制剂的结构。与亲本丁香脂素不同,设计的类似物弱抑制人类20S(Hs 20S)蛋白酶体,比人类对应物优先抑制Mtb 20S多达74倍。此外,它们可以穿透分枝杆菌的细胞包膜并使Mtb易受一氧化氮介导的压力的影响。重要的是,它们不会在体外抑制人细胞系的生长,因此可能是结核药物开发的起点。