乙氧酰胺
英哈
硫代酰胺
肺结核
麻风分枝杆菌
NAD+激酶
结核分枝杆菌
作用机理
双乙酰
异烟肼
药品
药理学
医学
化学
麻风病
生物化学
立体化学
免疫学
乙胺丁醇
酶
体外
病理
作者
Feng Wang,Robert Langley,Gülçin Gülten,Lynn G. Dover,Gurdyal S. Besra,William R. Jacobs,James C. Sacchettini
摘要
Thioamide drugs, ethionamide (ETH) and prothionamide (PTH), are clinically effective in the treatment of Mycobacterium tuberculosis, M. leprae, and M. avium complex infections. Although generally considered second-line drugs for tuberculosis, their use has increased considerably as the number of multidrug resistant and extensively drug resistant tuberculosis cases continues to rise. Despite the widespread use of thioamide drugs to treat tuberculosis and leprosy, their precise mechanisms of action remain unknown. Using a cell-based activation method, we now have definitive evidence that both thioamides form covalent adducts with nicotinamide adenine dinucleotide (NAD) and that these adducts are tight-binding inhibitors of M. tuberculosis and M. leprae InhA. The crystal structures of the inhibited M. leprae and M. tuberculosis InhA complexes provide the molecular details of target–drug interactions. The purified ETH-NAD and PTH-NAD adducts both showed nanomolar Kis against M. tuberculosis and M. leprae InhA. Knowledge of the precise structures and mechanisms of action of these drugs provides insights into designing new drugs that can overcome drug resistance.
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