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Journal of Bacteriology, December 2008, p. 8234-8237, Vol. 190, No. 24
0021-9193/08/$08.00+0     doi:10.1128/JB.01126-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Identification of Two Genes, sll0804 and slr1306, as Putative Components of the CO2-Concentrating Mechanism in the Cyanobacterium Synechocystis sp. Strain PCC 6803 {triangledown}

Shulu Zhang, Kevin W. Spann, Laurie K. Frankel, James V. Moroney, and Terry M. Bricker*

Department of Biological Sciences, Biochemistry and Molecular Biology Section, Louisiana State University, Baton Rouge, Louisiana 70803

Received 11 August 2008/ Accepted 3 October 2008

Insertional transposon mutations in the sll0804 and slr1306 genes were found to lead to a loss of optimal photoautotrophy in the cyanobacterium Synechocystis sp. strain PCC 6803 grown under ambient CO2 concentrations (350 ppm). Mutants containing these insertions (4BA2 and 3ZA12, respectively) could grow photoheterotrophically on glucose or photoautotrophically at elevated CO2 concentrations (50,000 ppm). Both of these mutants exhibited an impaired affinity for inorganic carbon. Consequently, the Sll0804 and Slr1306 proteins appear to be putative components of the carbon-concentrating mechanism in Synechocystis sp. strain PCC 6803.

* Corresponding author. Mailing address: Department of Biological Sciences, Biochemistry and Molecular Biology Section, Louisiana State University, Baton Rouge, LA 70803. Phone: (225) 578-1555. Fax: (225) 578-7258. E-mail: btbric{at}lsu.edu

{triangledown} Published ahead of print on 17 October 2008.

Journal of Bacteriology, December 2008, p. 8234-8237, Vol. 190, No. 24
0021-9193/08/$08.00+0     doi:10.1128/JB.01126-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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