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Journal of Bacteriology, June 2008, p. 4069-4074, Vol. 190, No. 11
0021-9193/08/$08.00+0     doi:10.1128/JB.00018-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Photoregulation of Cellular Morphology during Complementary Chromatic Adaptation Requires Sensor-Kinase-Class Protein RcaE in Fremyella diplosiphon{triangledown}

Juliana R. Bordowitz1,3 and Beronda L. Montgomery1,2,3*

Department of Energy—Plant Research Laboratory,1 Department of Biochemistry and Molecular Biology,2 Cell and Molecular Biology Graduate Program, Michigan State University, East Lansing, Michigan 488243

Received 4 January 2008/ Accepted 26 March 2008

We used wild-type UTEX481; SF33, a shortened-filament mutant strain that shows normal complementary chromatic adaptation pigmentation responses; and FdBk14, an RcaE-deficient strain that lacks light-dependent pigmentation responses, to investigate the molecular basis of the photoregulation of cellular morphology in the cyanobacterium Fremyella diplosiphon. Detailed microscopic and biochemical analyses indicate that RcaE is required for the photoregulation of cell and filament morphologies of F. diplosiphon in response to red and green light.

* Corresponding author. Mailing address: MSU-DOE Plant Research Laboratory, Michigan State University, 106 Plant Biology Building, East Lansing, MI 48824-1312. Phone: (517) 353-7802. Fax: (517) 353-9168. E-mail: montg133{at}msu.edu

{triangledown} Published ahead of print on 4 April 2008.

Journal of Bacteriology, June 2008, p. 4069-4074, Vol. 190, No. 11
0021-9193/08/$08.00+0     doi:10.1128/JB.00018-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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