445383-75-5Relevant academic research and scientific papers
ANTIBACTERIAL FAB I INHIBITORS
-
Page/Page column 21, (2008/06/13)
Disclosed herein are antibacterial compounds that inhibit fabl, a NADH-dependent enoyl [acyl carrier protein] reductase enzyme in the fatty acid biosynthesis pathway. The compounds are represented by structural formulas Ia and Ib: R1 and R2 are independently monocyclic aryl or heteroaryl groups, wherein the groups represented by R1 and R2 are optionally substituted with one or more acyclic substituents; R3 is -H or an optionally substituted C1-C8 aliphatic, C3-C8 cycloaliphatic, aryl, or heteroaryl group. X1 is a bond or a C1-C3 alkylene chain that is optionally substituted with a C1-C4 alkyl or an acidic group. X2 is an aryl, heteroaryl or C3-C8 cycloaliphatic ring, wherein the group represented by X2 is optionally substituted with triazole, tetrazole, and/or one or more acyclic substituents.
Identification and Characterization of Inhibitors of Bacterial Enoyl-Acyl Carrier Protein Reductase
Ling, Losee L.,Xian, Jun,Ali, Syed,Geng, Bolin,Fan, Jun,Mills, Debra M.,Arvanites, Anthony C.,Orgueira, Hernan,Ashwell, Mark A.,Carmel, Gilles,Xiang, Yibin,Moir, Donald T.
, p. 1541 - 1547 (2007/10/03)
Bacterial enoyl-acyl carrier protein reductase (ENR) catalyzes an essential step in fatty acid biosynthesis. ENR is an attractive target for narrow-spectrum antibacterial drug discovery because of its essential role in metabolism and its sequence conservation across many bacterial species. In addition, the bacterial ENR sequence and structural organization are distinctly different from those of mammalian fatty acid biosynthesis enzymes. High-throughput screening to identify inhibitors of Escherichia coli ENR yielded four structurally distinct classes of hits. Several members of one of these, the 2-(alkylthio)-4,6-diphenylpyridine-3-carbonitriles ( thiopyridines ), inhibited both purified ENR (50% inhibitory concentration [IC50] = 3 to 25 μM) and the growth of Staphylococcus aureus and Bacillus subtilis (MIC = 1 to 64 μg/ml). The effect on cell growth is due in part to inhibition of fatty acid biosynthesis as judged by inhibition of incorporation of [14C] acetate into fatty acids and by the increased sensitivity of cells that underexpress an ENR-encoding gene (four- to eightfold MIC shift). Synthesis of a variety of compounds in this chemical series revealed a correlation between IC 50 and MIC, and the results provided initial structure-activity relationships. Preliminary structure-activity relationships, potency on purified ENR, and activity on bacterial cells indicate that members of the thiopyridine chemical series are effective fatty acid biosynthesis inhibitors suitable for further antibacterial development.
