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Expression of the trxC Gene of Rhodobacter capsulatus: Response to Cellular Redox Status Is Mediated by the Transcriptional Regulator OxyR

Tanja Zeller, Kuanyu Li, and Gabriele Klug^*

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

Received 9 May 2006/ Accepted 7 August 2006

Despite the importance of thioredoxins in cellular functions, little is known about the regulation of trx genes. To understand the molecular mechanisms involved in the regulation of the Rhodobacter capsulatus trxC gene, the expression of this gene was investigated. We describe OxyR-dependent redox regulation of the trxC gene that adjusts the levels of thioredoxins in the cell.

Published ahead of print on 17 August 2006.

Present address: Innere Medizin III (Kardiologische Forschung), Universitätsklinikum des Saarlandes, 66421 Homburg/Saar, Germany.

Present address: Cell Biology and Metabolism Branch, National Institute of Child Health and Human Development, Bethesda, MD 20892.

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