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pubmed-article:19477414pubmed:abstractTextMycobacterium tuberculosis infection remains a major global health problem complicated by escalating rates of antibiotic resistance. Despite the established role of mycolic acid cyclopropane modification in pathogenesis, the feasibility of targeting this enzyme family for antibiotic development is unknown. We show through genetics and chemical biology that mycolic acid methyltransferases are essential for M. tuberculosis viability, cell wall structure, and intrinsic resistance to antibiotics. The tool compound dioctylamine, which we show acts as a substrate mimic, directly inhibits the function of multiple mycolic acid methyltransferases, resulting in loss of cyclopropanation, cell death, loss of acid fastness, and synergistic killing with isoniazid and ciprofloxacin. These results demonstrate that mycolic acid methyltransferases are a promising antibiotic target and that a family of virulence factors can be chemically inhibited with effects not anticipated from studies of each individual enzyme.lld:pubmed
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pubmed-article:19477414pubmed:dateRevised2010-12-3lld:pubmed
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pubmed-article:19477414pubmed:articleTitleMycolic acid cyclopropanation is essential for viability, drug resistance, and cell wall integrity of Mycobacterium tuberculosis.lld:pubmed
pubmed-article:19477414pubmed:affiliationMemorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.lld:pubmed
pubmed-article:19477414pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:19477414pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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