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Journal of Bacteriology, November 2007, p. 8387-8391, Vol. 189, No. 22
0021-9193/07/$08.00+0     doi:10.1128/JB.00736-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Transcriptome Analysis of the Vibrio fischeri LuxR-LuxI Regulon{triangledown}

Luis Caetano M. Antunes,1,2 Amy L. Schaefer,2 Rosana B. R. Ferreira,1,2 Nan Qin,3 Ann M. Stevens,3 Edward G. Ruby,4 and E. Peter Greenberg2*

Department of Microbiology, University of Iowa, Iowa City, Iowa 52242,1 Department of Microbiology, University of Washington, Seattle, Washington 98195,2 Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia 24061,3 Department of Medical Microbiology and Immunology, University of Wisconsin, Madison, Wisconsin 537064

Received 10 May 2007/ Accepted 27 August 2007

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.

* Corresponding author. Mailing address: Department of Microbiology, HSC K-359, University of Washington School of Medicine, 1959 NE Pacific St., Seattle, WA 98195. Phone: (206) 616-2881. Fax: (206) 616-2938. E-mail: epgreen{at}u.washington.edu

{triangledown} Published ahead of print on 7 September 2007.

Journal of Bacteriology, November 2007, p. 8387-8391, Vol. 189, No. 22
0021-9193/07/$08.00+0     doi:10.1128/JB.00736-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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