期刊
JOURNAL OF ANTIBIOTICS
卷 68, 期 4, 页码 271-278出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ja.2014.133
关键词
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资金
- National Institutes of Health [AI084411]
- University of Tennessee
- NIH Shared Instrumentation Grant
Capuramycin (1) and its analogs are strong translocase I (MurX/MraY) inhibitors. In our structure-activity relationship studies of capuramycin analogs against Mycobacterium tuberculosis (Mtb), we observed for the first time that a capuramycin analog, UT-01320 (3) killed nonreplicating (dormant) Mtb at low concentrations under low oxygen conditions, whereas selective MurX inhibitors killed only replicating Mtb under aerobic conditions. Interestingly, 3 did not exhibit MurX enzyme inhibitory activity even at high concentrations, however, 3 inhibited bacterial RNA polymerases with the IC50 values of 100-150 nM range. A new RNA polymerase inhibitor 3 displayed strong synergistic effects with a MurX inhibitor SQ 641 (2), a promising preclinical tuberculosis drug.
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