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© Mélanie Falord, Tarek Msadek, Jean-Marc Panaud
Staphylococcus aureus "golden staph" in scanning electron microscopy.
Publication : Journal of bacteriology

Induction and metabolite regulation of levanase synthesis in Bacillus subtilis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of bacteriology - 01 Apr 1989

Martin I, Debarbouille M, Klier A, Rapoport G

Link to Pubmed [PMID] – 2495266

J. Bacteriol. 1989 Apr;171(4):1885-92

Levanase expression in Bacillus subtilis was studied by using transcriptional and translational fusions. It was shown that the degradative products of levan or inulin and low concentrations of fructose were able to induce levanase expression. In the wild-type strain and in a constitutive overproducing sacL mutant, levanase synthesis was repressed by glucose or fructose. This catabolite repression was partially abolished in the derepressed alpha-amylase gra-26 mutant. The levanase gene (sacC) appears to be the distal gene of an operon transcribed from a fructose-inducible promoter. Deletion mapping experiments and primer extension analysis revealed a transcriptional start point located 2.7 kilobases upstream from the sacC gene. Two constitutive sacL mutations were shown to be closely linked by transformation to the sacC gene. The sacL6 and sacL8 mutations were mapped in the promoter-proximal region of the operon.

http://www.ncbi.nlm.nih.gov/pubmed/2495266