Abstract
It is proposed that cyclopropane fatty acid biosynthesis in Lactobacillus plantarum is regulated by in vivo variations in the activities of two enzymes acting sequentially. S-adenosylhomocysteine hydrolase relieves the end-product inhibition of cyclopropane synthetase by degrading a product (S-adenosyl-homocysteine) of the latter enzyme activity. Both enzymes show an abrupt increase and subsequent decrease in activity at a time during the bacterial growth cycle which corresponds to the period of most rapid synthesis of cyclopropane fatty acid in vivo .
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More From: Biochemical and Biophysical Research Communications
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