Structural Mechanism for Rifampicin Inhibition of Bacterial RNA Polymerase
Rifampicin (Rif) is one of the most potent and broad spectrum antibiotics against bacterial pathogens and is a key component of anti-tuberculosis therapy, stemming from its inhibition of the bacterial RNA polymerase (RNAP). We determined the crystal structure of Thermus aquaticus core RNAP complexed...
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Veröffentlicht in: | Cell 2001-03, Vol.104 (6), p.901-912 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Rifampicin (Rif) is one of the most potent and broad spectrum antibiotics against bacterial pathogens and is a key component of anti-tuberculosis therapy, stemming from its inhibition of the bacterial RNA polymerase (RNAP). We determined the crystal structure of
Thermus aquaticus core RNAP complexed with Rif. The inhibitor binds in a pocket of the RNAP β subunit deep within the DNA/RNA channel, but more than 12 Å away from the active site. The structure, combined with biochemical results, explains the effects of Rif on RNAP function and indicates that the inhibitor acts by directly blocking the path of the elongating RNA when the transcript becomes 2 to 3 nt in length. |
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ISSN: | 0092-8674 1097-4172 |
DOI: | 10.1016/S0092-8674(01)00286-0 |