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Journal of Bacteriology, August 2005, p. 5841-5845, Vol. 187, No. 16
0021-9193/05/$08.00+0     doi:10.1128/JB.187.16.5841-5845.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

The Leptospira interrogans lexA Gene Is Not Autoregulated

Jordi Cuñé,1 Paul Cullen,2 Gerard Mazon,3 Susana Campoy,3 Ben Adler,2 and Jordi Barbe1,3*

Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain,1 Australian Bacterial Pathogenesis Program, Department of Microbiology, Monash University, Victoria 3800, Australia,2 Centre de Recerca en Sanitat Animal, Bellaterra, 08193 Barcelona, Spain3

Received 17 March 2005/ Accepted 30 May 2005

Footprinting and mutagenesis experiments demonstrated that Leptospira interrogans LexA binds the palindrome TTTGN5CAAA found in the recA promoter but not in the lexA promoter. In silico analysis revealed that none of the other canonical SOS genes is under direct control of LexA, making the leptospiral lexA gene the first described which is not autoregulated.

* Corresponding author. Mailing address: Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, Bellaterra, 08193 Barcelona, Spain. Phone: 34-93-581 1837. Fax: 34-93-581 2387. E-mail: jordi.barbe{at}uab.es.

Journal of Bacteriology, August 2005, p. 5841-5845, Vol. 187, No. 16
0021-9193/05/$08.00+0     doi:10.1128/JB.187.16.5841-5845.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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