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Journal of Bacteriology, February 2007, p. 1145-1149, Vol. 189, No. 3
0021-9193/07/$08.00+0     doi:10.1128/JB.01061-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

RamB, the Transcriptional Regulator of Acetate Metabolism in Corynebacterium glutamicum, Is Subject to Regulation by RamA and RamB{triangledown}

Annette Cramer,1 Marc Auchter,1 Julia Frunzke,2 Michael Bott,2 and Bernhard J. Eikmanns1*

Department of Microbiology and Biotechnology, University of Ulm, 89069 Ulm,1 Institute of Biotechnology 1, Research Center Jülich, D-52425 Jülich, Germany2

Received 19 July 2006/ Accepted 5 November 2006

In Corynebacterium glutamicum, the transcriptional regulator RamB negatively controls the expression of genes involved in acetate metabolism. Here we show that RamB represses its own expression by direct interaction with a 13-bp motif in the ramB promoter region. Additionally, ramB expression is subject to carbon source-dependent positive control by RamA.

* Corresponding author. Mailing address: Department of Microbiology and Biotechnology, University of Ulm, 89069 Ulm, Germany. Phone: 49 731 50 22707. Fax: 49 731 50 22719. E-mail: bernhard.eikmanns{at}uni-ulm.de.

{triangledown} Published ahead of print on 17 November 2006.

Journal of Bacteriology, February 2007, p. 1145-1149, Vol. 189, No. 3
0021-9193/07/$08.00+0     doi:10.1128/JB.01061-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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