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Journal of Bacteriology, September 2006, p. 6411-6414, Vol. 188, No. 17
0021-9193/06/$08.00+0     doi:10.1128/JB.00716-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Blue Light Activates the {sigma}B-Dependent Stress Response of Bacillus subtilis via YtvA

Marcela Ávila-Pérez, Klaas J. Hellingwerf, and Remco Kort*

Department of Molecular Microbial Physiology, Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands

Received 18 May 2006/ Accepted 9 June 2006

Here we present evidence for a physiologically relevant light response mediated by the LOV domain-containing protein YtvA in the soil bacterium Bacillus subtilis. The loss and overproduction of YtvA abolish and enhance, respectively, the increase in {sigma}B-controlled ctc promoter activity at moderate light intensities. These effects were absent in the dark and in red light but present under blue-light illumination. Thus, activation of the general stress response in B. subtilis is modulated by blue light.

* Corresponding author. Mailing address: Department of Molecular Microbial Physiology, Swammerdam Institute for Life Sciences, Faculty of Science, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands. Phone: 31 20 525 7062. Fax: 31 20 525 7056. E-mail: rkort{at}science.uva.nl.

Journal of Bacteriology, September 2006, p. 6411-6414, Vol. 188, No. 17
0021-9193/06/$08.00+0     doi:10.1128/JB.00716-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



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