Journal
SCIENCE
Volume 321, Issue 5892, Pages 1078-1080Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1160354
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Funding
- NIH [RO3 NS053582, RO1 AI053067, RO1 GM31278, PO1-AI055637-03, UO1-AI77853, R21 AI067827]
- Ellison Medical Foundation
- Burroughs Wellcome Fund
- Robert A. Welch Foundation
- UT Southwestern Medical Center
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Many bacterial pathogens rely on a conserved membrane histidine sensor kinase, QseC, to respond to host adrenergic signaling molecules and bacterial signals in order to promote the expression of virulence factors. Using a high- throughput screen, we identified a small molecule, LED209, that inhibits the binding of signals to QseC, preventing its autophosphorylation and consequently inhibiting QseC- mediated activation of virulence gene expression. LED209 is not toxic and does not inhibit pathogen growth; however, this compound markedly inhibits the virulence of several pathogens in vitro and in vivo in animals. Inhibition of signaling offers a strategy for the development of broad- spectrum antimicrobial drugs.
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