Gupta, Rajesh Kumar ; Thakur, Tejender S. ; Desiraju, Gautam R. ; Tyagi, Jaya Sivaswami (2009) Structure-based design of devr inhibitor active against nonreplicating mycobacterium tuberculosis Journal of Medicinal Chemistry, 52 (20). pp. 6324-6334. ISSN 0022-2623
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jm900358q
Related URL: http://dx.doi.org/10.1021/jm900358q
Abstract
Antitubercular treatment is directed against actively replicating organisms. There is an urgent need to develop drugs targeting persistent subpopulations of Mycobacterium tuberculosis. The DevR response regulator is believed to play a key role in bacterial dormancy adaptation during hypoxia. We developed a homology-based model of DevR and used it for the rational design of inhibitors. A phenylcoumarin derivative (compound 10) identified by in silico pharmacophore-based screening of 2.5 million compounds employing protocols with some novel features including a water-based pharmacophore query, was characterized further. Compound 10 inhibited DevR binding to target DNA, down-regulated dormancy genes transcription, and drastically reduced survival of hypoxic but not nutrient-starved dormant bacteria or actively growing organisms. Our findings suggest that compound 10 "locks"DevR in an inactive conformation that is unable to bind cognate DNA and induce the dormancy regulon. These results provide proof-of-concept for DevR as a novel target to develop molecules with sterilizing activity against tubercle bacilli.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 10931 |
Deposited On: | 09 Nov 2010 04:29 |
Last Modified: | 09 Oct 2011 07:32 |
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