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Appl. Environ. Microbiol., Sep 1996, 3499-3501, Vol 62, No. 9
Copyright © 1996, American Society for Microbiology

Properties of Allyl Alcohol-Resistant Mutants of Clostridium butyricum Grown on Glycerol

S Abbad-Andaloussi, J Amine, P Gerard, E Petitdemange and H Petitdemange
Laboratoire de Chimie Biologique I, Universite Henri Poincare, Nancy I, 54506 Vandoeuvre-les-Nancy Cedex, France, and Laboratoire de Biochimie, Faculte des Sciences, Universite Chouaib Doukkali, El Jadida, Morocco

Mutants of Clostridium butyricum E5 exhibiting resistance to allyl alcohol which produced the same quantities of 1,3-propanediol as the wild-type strain but more acetate than butyrate were isolated. The acetate-butyrate formation plays a major function in the regulation of the internal redox balance. Allyl alcohol resistance can be attributed not to the loss of 1,3-propanediol dehydrogenase but to a shift in the reductive properties of the enzyme. The data support the view that cellular regulation is modified to avoid intracellular accumulation of 3-hydroxypropionaldehyde.




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