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Journal of Bacteriology, October 2004, p. 6656-6660, Vol. 186, No. 19
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.19.6656-6660.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

DNA Binding Activity of the Escherichia coli Nitric Oxide Sensor NorR Suggests a Conserved Target Sequence in Diverse Proteobacteria

Nicholas P. Tucker,1 Benoît D'Autréaux,1 David J. Studholme,2 Stephen Spiro,3* and Ray Dixon1

John Innes Centre, Colney, Norwich,1 Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom,2 School of Biology, Georgia Institute of Technology, Atlanta, Georgia3

Received 6 May 2004/ Accepted 7 July 2004

The Escherichia coli nitric oxide sensor NorR was shown to bind to the promoter region of the norVW transcription unit, forming at least two distinct complexes detectable by gel retardation. Three binding sites for NorR and two integration host factor binding sites were identified in the norR-norV intergenic region. The derived consensus sequence for NorR binding sites was used to search for novel members of the E. coli NorR regulon and to show that NorR binding sites are partially conserved in other members of the proteobacteria.

* Corresponding author. Mailing address: School of Biology, Georgia Institute of Technology, 310 Ferst Dr., Atlanta, GA 30332-0230. Phone: (404) 385-6313. Fax: (404) 894-0519. E-mail: stephen.spiro{at}biology.gatech.edu.

Journal of Bacteriology, October 2004, p. 6656-6660, Vol. 186, No. 19
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.19.6656-6660.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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