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Journal of Bacteriology, July 2007, p. 5387-5392, Vol. 189, No. 14
0021-9193/07/$08.00+0     doi:10.1128/JB.00553-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

QseA and GrlR/GrlA Regulation of the Locus of Enterocyte Effacement Genes in Enterohemorrhagic Escherichia coli{triangledown}

Regan M. Russell, Faith C. Sharp, David A. Rasko, and Vanessa Sperandio*

Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9048

Received 11 April 2007/ Accepted 1 May 2007

Transcription of the locus of enterocyte effacement (LEE) genes in enterohemorrhagic Escherichia coli (EHEC) is regulated by the LEE-encoded Ler and GrlR/GrlA proteins as well as the non-LEE-encoded regulator QseA. This work demonstrates that GrlR/GrlA activate LEE2 transcription in a Ler-independent fashion, whereas transcription of grlRA is activated by QseA in both Ler-dependent and -independent manners.

* Corresponding author. Mailing address: University of Texas Southwestern Medical Center, Department of Microbiology, 5323 Harry Hines Blvd., Dallas, TX 75390-9048. Phone: (214) 648-1603. Fax: (214) 648-5905. E-mail: vanessa.sperandio{at}u-tsouthwestern.edu

{triangledown} Published ahead of print on 11 May 2007.

Journal of Bacteriology, July 2007, p. 5387-5392, Vol. 189, No. 14
0021-9193/07/$08.00+0     doi:10.1128/JB.00553-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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