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Applied and Environmental Microbiology, October 1998, p. 4109-4112, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Heat Killing of Bacillus subtilis Spores in Water Is Not Due to Oxidative Damage

Barbara Setlow and Peter Setlow*

Department of Biochemistry, University of Connecticut Health Center, Farmington, Connecticut 06032

Received 22 May 1998/Accepted 23 July 1998

The heat resistance of wild-type spores of Bacillus subtilis or spores (termed alpha -beta -) lacking DNA protective alpha /beta -type small, acid-soluble spore proteins was not altered by anaerobiosis or high concentrations of the free radical scavenging agents ethanethiol and ethanedithiol. Heat-killed wild-type and alpha -beta - spores exhibited no increase in either protein carbonyl content or oxidized bases in DNA. These data strongly suggest that oxidative damage to spore macromolecules does not contribute significantly to spore killing by heat.

* Corresponding author. Mailing address: Department of Biochemistry, University of Connecticut Health Center, 263 Farmington Ave., Farmington, CT 06032. Phone: (860) 679-2607. Fax: (860) 679-3408. E-mail: setlow{at}sun.uchc.edu.

Applied and Environmental Microbiology, October 1998, p. 4109-4112, Vol. 64, No. 10
0099-2240/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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