Structural Basis of Mycobacterium tuberculosis Transcription and Transcription Inhibition.
Mol Cell
; 66(2): 169-179.e8, 2017 Apr 20.
Article
em En
| MEDLINE
| ID: mdl-28392175
ABSTRACT
Mycobacterium tuberculosis (Mtb) is the causative agent of tuberculosis, which kills 1.8 million annually. Mtb RNA polymerase (RNAP) is the target of the first-line antituberculosis drug rifampin (Rif). We report crystal structures of Mtb RNAP, alone and in complex with Rif, at 3.8-4.4 Å resolution. The results identify an Mtb-specific structural module of Mtb RNAP and establish that Rif functions by a steric-occlusion mechanism that prevents extension of RNA. We also report non-Rif-related compounds-Nα-aroyl-N-aryl-phenylalaninamides (AAPs)-that potently and selectively inhibit Mtb RNAP and Mtb growth, and we report crystal structures of Mtb RNAP in complex with AAPs. AAPs bind to a different site on Mtb RNAP than Rif, exhibit no cross-resistance with Rif, function additively when co-administered with Rif, and suppress resistance emergence when co-administered with Rif.
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Base de dados:
MEDLINE
Assunto principal:
Proteínas de Bactérias
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Transcrição Gênica
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RNA Polimerases Dirigidas por DNA
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Regulação Bacteriana da Expressão Gênica
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Mycobacterium tuberculosis
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article