Small, acid-soluble proteins bound to DNA protect Bacillus subtilis spores from being killed by freeze-drying

Author:

Fairhead H1,Setlow B1,Waites W M1,Setlow P1

Affiliation:

1. Department of Applied Biochemistry and Food Science, University of Nottingham, Loughborough, Leicestershire, United Kingdom.

Abstract

Wild-type spores of Bacillus subtilis were resistant to eight cycles of freeze-drying, whereas about 90% of spores lacking the two major DNA-binding proteins (small, acid-soluble proteins alpha and beta) were killed by three to four cycles of freeze-dryings, with significant mutagenesis and DNA damage accompanying the killing. This role for alpha/beta-type small, acid-soluble proteins in spore resistance to freeze-drying may be important in spore survival in the environment.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Reference15 articles.

1. Mutation induction in bacteria by freeze-drying;Ashwood-Smith M. J.;Cryobiology,1976

2. Bousfield I. J. and A. R. MacKenzie. 1976. Inactivation of bacteria by freeze drying p. 329-344. In F. A. Skinner and W. B. Hugo (ed.) Inhibition and inactivation of vegetative microbes. Academic Press New York.

3. Cryopreservation of microorganisms;Calcott P. H.;Crit. Rev. Biotechnol.,1986

4. Mutagenicity of freezing and thawing;Calcott P. H.;FEMS Microbiol. Lett.,1981

5. Prevention of DNA damage in spores and in vitro by small, acid-soluble proteins from Bacillus species;Fairhead H.;J. Bacteriol.,1993

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