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Journal of Bacteriology, November 1999, p. 7136-7139, Vol. 181, No. 22
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Transcriptional Analysis of the Rubrerythrin and Superoxide Dismutase Genes of Clostridium perfringens

Thomas A. Geissmann, Michael Teuber, and Leo Meile*

Laboratorium für Lebensmittel-Mikrobiologie, Institut für Lebensmittelwissenschaft, Eidgenössische Technische Hochschule, ETH-Zentrum, CH-8092 Zürich, Switzerland

Received 23 July 1999/Accepted 8 September 1999

We cloned and sequenced a 2.7-kb fragment of chromosomal DNA from Clostridium perfringens containing the superoxide dismutase-encoding gene, sod. Previously, rubrerythrin from C. perfringens had been isolated and its gene (rbr) had been cloned (Y. Lehmann, L. Meile, and M. Teuber, J. Bacteriol. 178:7152-7158, 1996). Northern blot experiments revealed a length of approximately 800 bases for each transcript of rbr and sod of C. perfringens. Thus, rbr and sod each represent a monocistronic operon. Their transcription start points were located by primer extension analyses. sod transcription was shown to depend on the growth phase, and it reached a maximum during the transition from log phase to stationary phase. Neither sod nor rbr transcription was influenced by oxidative stress.

* Corresponding author. Mailing address: Food Microbiology, ETH-Zentrum, CH-8092 Zürich, Switzerland. Phone: 0041-1-632 33 62. Fax: 0041-1-632 12 66. E-mail: meile{at}ilw.agrl.ethz.ch.

Journal of Bacteriology, November 1999, p. 7136-7139, Vol. 181, No. 22
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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