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Journal of Bacteriology, September 1999, p. 5505-5508, Vol. 181, No. 17
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

First Evidence for the Presence of a Hydrogenase in the Sulfur-Reducing Bacterium Desulfuromonas acetoxidans

Marianne Brugna,1 Wolfgang Nitschke,1 René Toci,2 Mireille Bruschi,1 and Marie-Thérèse Giudici-Orticoni1,*

Laboratoire de Bioénergétique et Ingénierie des Protéines, UPR 9036 CNRS,1 and Laboratoire de Chimie Bactérienne, UPR 9043 CNRS,2 Institut de Biologie Structurale et Microbiologie, 13402 Marseille Cedex 20, France

Received 15 March 1999/Accepted 22 June 1999

Hydrogenases, which are ubiquitous in sulfate-reducing bacteria, were previously thought to be absent from Desulfuromonas acetoxidans. For the first time, a hydrogenase from the strict anaerobic sulfur-respiring bacterium D. acetoxidans, grown on ethanol-malate, was detected and enriched. To assay the role of the hydrogenase in the energetic metabolism of D. acetoxidans, we examined the reactivity of the enzyme with polyheme cytochromes from the same bacterium.

* Corresponding author. Mailing address: Laboratoire de Bioénergétique et Ingénierie des Protéines, UPR 9036 CNRS, Institut de Biologie Structurale et Microbiologie, 31 chemin J. Aiguier, 13402 Marseille Cedex 20, France. Phone: 33 4 91 16 45 50. Fax: 33 4 91 16 45 78. E-mail: giudici{at}ibsm.cnrs-mrs.fr.

Journal of Bacteriology, September 1999, p. 5505-5508, Vol. 181, No. 17
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.




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