Abstract
Although isoniazid (isonicortinic acid hydrazide, INH) is widely used for the treatment of tuberculosis, its molecular target has remained elusive. In response to INH treatment, saturated hexacosanoic acid (C26:0) accumulated on a 12-kilodalton acyl carrier protein (AcpM) that normally carried mycolic acid precursors as long as C50. A protein species purified from INH-treated Mycobacterium tuberculosis was shown to consist of a covalent complex of INH, AcpM, and a β-ketoacyl acyl carrier protein in synthase, KasA. Amino acid- altering mutations in the KasA protein were identified in INH-resistant patient isolates that lacked other mutations associated with resistance to this drug.
Original language | English (US) |
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Pages (from-to) | 1607-1610 |
Number of pages | 4 |
Journal | Science |
Volume | 280 |
Issue number | 5369 |
DOIs | |
State | Published - Jun 5 1998 |
ASJC Scopus subject areas
- General