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J. Bacteriol. doi:10.1128/JB.00736-07
Copyright (c) 2007, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

A Transcriptome Analysis of the Vibrio fischeri LuxR-LuxI Regulon

Department of Microbiology, University of Iowa, Iowa City, IA 52242, Department of Microbiology, University of Washington, Seattle, WA 98195, Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, Department of Medical Microbiology and Immunology, University of Wisconsin, Madison, WI 53706

^* To whom correspondence should be addressed. Email: epgreen{at}u.washington.edu.

	Abstract

The Vibrio fischeri quorum-sensing signal N-3-oxohexanoyl-L-homoserine lactone (3OC6-HSL) activates expression of the seven-gene luminescence operon. We used microarrays to unveil 18 additional 3OC6-HSL-controlled genes, 3 of which had been identified by other means, previously. We show most of these genes are regulated by the 3OC6-HSL-responsive transcriptional regulator, LuxR, directly. This demonstrates that V. fischeri quorum sensing regulates a substantial number of genes other than those involved in light production.

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