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Updated: Aug 16, 2026

Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
Published on: January 18, 2014
Expression of the gene encoding glycerol-3-phosphate dehydrogenase (glpD) in Bacillus subtilis is controlled by
1Department of Microbiology, University of Lund, Sweden.
Abstract:
The Bacillus subtilis glpD gene encodes glycerol-3-phosphate (G3P) dehydrogenase. A sigma A type promoter and the transcriptional startpoint for glpD were identified. Between the transcriptional startpoint and glpD there is an inverted repeat followed by a run of T residues. The inverted repeat prevents expression of a reporter gene, xylE, when positioned between this gene and a constitutive promoter. Expression of xylE, like expression of glpD, is induced by G3P and repressed by glucose. Induction also requires the product of the glpP gene. Our results suggest that glpD expression is controlled by antitermination of transcription. The inverted repeat appears to be a target for induction by G3P and GlpP. We speculate that glucose repression is mediated via an inhibitory effect on synthesis or activity of GlpP.
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