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  • Title: Catabolite repression of beta-glucanase synthesis in Bacillus subtilis.
    Author: Krüger S, Stülke J, Hecker M.
    Journal: J Gen Microbiol; 1993 Sep; 139(9):2047-54. PubMed ID: 8245831.
    Abstract:
    beta-Glucanase synthesis in Bacillus subtilis was repressed by glucose and other substrates of glycolysis. Experiments with different pts mutants showed that the phosphoenolpyruvate: sugar phosphotransferase system is not involved in carbon catabolite repression of beta-glucanase synthesis. Carbon catabolite repression of beta-glucanase synthesis was completely abolished in a ccpA mutant. An operator structure similar to those upstream of amyE and the xyl operon was found and was shown by site-directed mutagenesis to be the target for carbon catabolite repression of beta-glucanase synthesis. The presence of this operator on a multi-copy plasmid resulted in a reduced repression of both beta-glucanase and alpha-amylase synthesis. It seems likely that the gene encoding these enzymes are part of one regulon with respect to catabolite repression.
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