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Journal of Bacteriology, February 2008, p. 1118-1123, Vol. 190, No. 3
0021-9193/08/$08.00+0     doi:10.1128/JB.01521-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

A Highly Conserved Protein of Unknown Function Is Required by Sinorhizobium meliloti for Symbiosis and Environmental Stress Protection{triangledown}

Bryan W. Davies and Graham C. Walker*

Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Received 20 September 2007/ Accepted 17 November 2007

We report here the first characterization of the Sinorhizobium meliloti open reading frame SMc01113. The SMc01113 protein is a member of a highly conserved protein family, universal among bacteria. We demonstrate that the SMc01113 gene is absolutely required for S. meliloti symbiosis with alfalfa and also for the protection of the bacterium from a wide range of environmental stresses.

* Corresponding author. Mailing address: Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139. Phone: (617) 253-6711. Fax: (617) 253-2643. E-mail: gwalker{at}mit.edu

{triangledown} Published ahead of print on 30 November 2007.

Journal of Bacteriology, February 2008, p. 1118-1123, Vol. 190, No. 3
0021-9193/08/$08.00+0     doi:10.1128/JB.01521-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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