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Journal of Bacteriology, January 2004, p. 235-239, Vol. 186, No. 1
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.1.235-239.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Null Mutation of HvrA Compensates for Loss of an Essential relA/spoT-Like Gene in Rhodobacter capsulatus

Shinji Masuda1* and Carl E. Bauer2

Laboratory for Photobiology, RIKEN Photodynamics Research Center, Sendai 980-0845, Japan,1 Department of Biology, Indiana University, Bloomington, Indiana 474052

Received 4 August 2003/ Accepted 3 October 2003

We report that a single relA/spoT-like gene exists on the Rhodobacter capsulatus chromosome, and its mutational loss is lethal. This gene could be mutated only under a mutational background of a null mutation in the nucleoid protein HvrA. This result suggests that there may be a direct link between HvrA-regulated promoters and the ppGpp-related stringent response.

* Corresponding author. Mailing address: Laboratory for Photobiology, RIKEN Photodynamics Research Center, Sendai 980-0845, Japan. Phone: (81) 22-228-2047. Fax: (81) 22-228-2045. E-mail: smasuda{at}postman.riken.go.jp.

Journal of Bacteriology, January 2004, p. 235-239, Vol. 186, No. 1
0021-9193/04/$08.00+0     DOI: 10.1128/JB.186.1.235-239.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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