101. Structural and biological evaluation of a novel series of benzimidazole inhibitors of Francisella tularensis enoyl-ACP reductase (FabI).
- Author
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Mehboob, Shahila, Song, Jinhua, Hevener, Kirk E., Su, Pin-Chih, Boci, Teuta, Brubaker, Libby, Truong, Lena, Mistry, Tina, Deng, Jiangping, Cook, James L., Santarsiero, Bernard D., Ghosh, Arun K., and Johnson, Michael E.
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STRUCTURE-activity relationship in pharmacology , *BENZIMIDAZOLES , *ENZYME inhibitors , *FRANCISELLA tularensis , *ENOYL-acyl carrier protein reductase (NADH) , *GRAM-negative bacterial diseases - Abstract
Francisella tularensis , the causative agent of tularemia, presents a significant biological threat and is a Category A priority pathogen due to its potential for weaponization. The bacterial FASII pathway is a viable target for the development of novel antibacterial agents treating Gram-negative infections. Here we report the advancement of a promising series of benzimidazole FabI (enoyl-ACP reductase) inhibitors to a second-generation using a systematic, structure-guided lead optimization strategy, and the determination of several co-crystal structures that confirm the binding mode of designed inhibitors. These compounds display an improved low nanomolar enzymatic activity as well as promising low microgram/mL antibacterial activity against both F. tularensis and Staphylococcus aureus and its methicillin-resistant strain (MRSA). The improvements in activity accompanying structural modifications lead to a better understanding of the relationship between the chemical structure and biological activity that encompasses both enzymatic and whole-cell activity. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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