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Journal of Bacteriology, July 2009, p. 4473-4477, Vol. 191, No. 13
0021-9193/09/$08.00+0     doi:10.1128/JB.00262-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

In Vivo Sensitivity of Blue-Light-Dependent Signaling Mediated by AppA/PpsR or PrrB/PrrA in Rhodobacter sphaeroides{triangledown}

Sebastian Metz, Andreas Jäger, and Gabriele Klug*

Institut für Mikro- und Molekularbiologie, University of Giessen, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany

Received 27 February 2009/ Accepted 21 April 2009

Formation of photosynthesis complexes in Rhodobacter sphaeroides is regulated in a redox- and light-dependent manner by the AppA/PpsR and PrrB/PrrA systems. While on the one hand, blue light is sensed by the flavin adenine dinucleotide-binding BLUF domain of AppA, on the other, light is absorbed by bacteriochlorophyll signals through PrrB/PrrA. We show that much smaller quantities initiate the AppA-mediated response to blue light than the bacteriochlorophyll-mediated response.

* Corresponding author. Mailing address: Institut für Mikro- und Molekularbiologie, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany. Phone: (49) 641 99 355 42. Fax: (49) 641 99 3555 49. E-mail: Gabriele.Klug{at}mikro.bio.uni-giessen.de

{triangledown} Published ahead of print on 24 April 2009.

Journal of Bacteriology, July 2009, p. 4473-4477, Vol. 191, No. 13
0021-9193/09/$08.00+0     doi:10.1128/JB.00262-09
Copyright © 2009, American Society for Microbiology. All Rights Reserved.





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