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Journal of Bacteriology, August 2004, p. 5543-5546, Vol. 186, No. 16
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.16.5543-5546.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

The RpoS Sigma Factor in the Dissimilatory Fe(III)-Reducing Bacterium Geobacter sulfurreducens

Cinthia Núñez,1,2* Lorrie Adams,1 Susan Childers,1,3 and Derek R. Lovley1

Department of Microbiology, University of Massachusetts, Amherst, Massachusetts 01003,1 Department of Geological Sciences, University of Idaho, Moscow, Idaho 83844,3 Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México 622102

Received 30 January 2004/ Accepted 10 May 2004

Geobacter sulfurreducens RpoS sigma factor was shown to contribute to survival in stationary phase and upon oxygen exposure. Furthermore, a mutation in rpoS decreased the rate of reduction of insoluble Fe(III) but not of soluble forms of iron. This study suggests that RpoS plays a role in regulating metabolism of Geobacter under suboptimal conditions in subsurface environments.

* Corresponding author. Mailing address: Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, Col. Chamilpa Cuernavaca, Morelos 62210, México. Phone: (52) 777 329-16-29. Fax: (52) 777 317-23-88. E-mail: cinthia{at}ibt.unam.mx.

Journal of Bacteriology, August 2004, p. 5543-5546, Vol. 186, No. 16
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.16.5543-5546.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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