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Applied and Environmental Microbiology, February 2003, p. 1287-1289, Vol. 69, No. 2
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.2.1287-1289.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Impaired Temperature Stress Response of a Streptococcus thermophilus deoD Mutant

Mario Varcamonti,1* Maria R. Graziano,1 Romilde Pezzopane,1 Gino Naclerio,2 Slavica Arsenijevic,1 and Maurilio De Felice1

Section of Microbiology, Department of General and Environmental Physiology, University "Federico II," 80134 Naples,1 Department of Environmental Sciences and Technologies, University of Molise, 86170 Isernia, Italy2

Received 31 July 2002/ Accepted 18 November 2002

An insertional deoD mutant of Streptococcus thermophilus strain SFi39 had a reduced growth rate at 20°C and an enhanced survival capacity to heat shock compared to the wild type, indicating that the deoD product is involved in temperature shock adaptation. We report evidence that ppGpp is implicated in this dual response.

* Corresponding author. Mailing address: Section of Microbiology, Department of General and Environmental Physiology, Via Mezzocannone 16, University "Federico II," 80134 Naples, Italy. Phone: (39) 081-2534634. Fax: (39) 081-5514437. E-mail: varcamon{at}unina.it.

Applied and Environmental Microbiology, February 2003, p. 1287-1289, Vol. 69, No. 2
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.2.1287-1289.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.





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