1.
Tuberculosis (Edinb)
; 115: 63-66, 2019 03.
Artigo
em Inglês
| MEDLINE
| ID: mdl-30948178
RESUMO
The Mycobacterium tuberculosis mec+-cysO-cysM gene cluster was shown to be part of a novel cysteine biosynthesis pathway in vitro, but little is known about its essentiality or role in M. tuberculosis physiology. In this study, we generate a knock out of the mec+-cysO-cysM gene cluster in M. tuberculosis and show that the gene cluster is not essential under a variety of conditions, suggesting redundancy in pathways for cysteine biosynthesis in M. tuberculosis. The cysteine biosynthesis gene cluster is essential for resistance for clofazimine, a peroxide-producing anti-leprosy drug. Therefore, although under most conditions the pathway is not essential, it likely has an important role in defense against oxidative stress in M. tuberculosis.