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J Bacteriol, April 1998, p. 2224-2227, Vol. 180, No. 8
0021-9193/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Temperature Sensitivity of Bacteriolysis Induced by beta -Lactam Antibiotics in Amino Acid-Deprived Escherichia coli

Dmitrii G. Rodionovdagger and Edward E. Ishiguro*

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

Received 10 October 1997/Accepted 9 February 1998

The temperature-sensitive penicillin tolerance response previously reported in amino acid-deprived Escherichia coli (W. Kusser and E. E. Ishiguro, J. Bacteriol. 169:2310-2312, 1987) was not due to the induction of the heat shock response resulting from a temperature upshift and was therefore unrelated to the findings of another report (J. K. Powell and K. D. Young, J. Bacteriol. 173:4021-4026, 1991) indicating a positive correlation between the expression of heat shock proteins and penicillin tolerance. The thermosensitive event occurred in the lysis induction stage.

* Corresponding author. Mailing address: Department of Biochemistry and Microbiology, University of Victoria, P.O. Box 3055, Victoria, B.C., Canada V8W 3P6. Phone: (250) 721 7071. Fax: (250) 721 8855. E-mail: EISHUV{at}uvvm.uvic.ca.

dagger Present address: Department of Biology, University of Oslo, N-0316 Oslo, Norway.






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