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J Bacteriol, April 1998, p. 1959-1961, Vol. 180, No. 7
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Occurrence of Homologs of the Escherichia coli lytB Gene in Gram-Negative Bacterial Species

Sheila Potter, Xiaoming Yang, Martin J. Boulanger,dagger and Edward E. Ishiguro*

Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia, Canada V8W 3P6

Received 24 September 1997/Accepted 25 January 1998

The Escherichia coli LytB protein regulates the activity of guanosine 3',5'-bispyrophosphate synthetase I (RelA). A Southern blot analysis of chromosomal DNA with the E. coli lytB gene as a probe revealed the presence of lytB homologs in all of the gram-negative bacterial species examined but not in gram-positive species. The lytB homologs from Enterobacter aerogenes and Pseudomonas fluorescens complemented the E. coli lytB44 mutant allele.

* Corresponding author. Mailing address: Department of Biochemistry and Microbiology, University of Victoria, P.O. Box 3055, Victoria, British Columbia, Canada V8W 3P6. Phone: (250) 721-7071. Fax: (250) 721-8855. E-mail: EISHUV{at}UVVM.UVIC.CA.

dagger Present address: Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada V6T 1W5.




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