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Journal of Bacteriology, May 2002, p. 2815-2820, Vol. 184, No. 10
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.10.2815-2820.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Coordination of Ubiquinol Oxidase and Cytochrome cbb3 Oxidase Expression by Multiple Regulators in Rhodobacter capsulatus

Danielle L. Swem and Carl E. Bauer*

Department of Biology, Indiana University, Bloomington, Indiana 47405

Received 7 August 2001/ Accepted 24 January 2002

Rhodobacter capsulatus utilizes two terminal oxidases for aerobic respiration, cytochrome cbb3 and ubiquinol oxidase. To determine the transcription factors involved in terminal oxidase expression, ccoN-lacZ and cydA-lacZ protein fusions were assayed in a variety of regulatory mutants. The results of this and previous studies indicate that cytochrome cbb3 expression is controlled by regB-regA, fnrL, and hvrA and that ubiquinol oxidase expression is controlled by regB-regA, fnrL, hvrA, crtJ, and aerR.

* Corresponding author. Mailing address: Department of Biology, Jordan Hall, Bloomington, IN 47405. Phone: (812) 855-6595. Fax: (812) 856-4178. E-mail: cbauer{at}bio.indiana.edu.

Journal of Bacteriology, May 2002, p. 2815-2820, Vol. 184, No. 10
0021-9193/02/$04.00+0     DOI: 10.1128/JB.184.10.2815-2820.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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