Regulation of pag gene expression in Bacillus anthracis: use of a pag-lacZ transcriptional fusion.
The production of protective antigen (PA), the common component of the two anthrax toxins, is influenced by the environment. In order to examine factors involved in its regulation, a transcriptional fusion between the promoter region of the PA gene (pag) and the lacZ gene was constructed and introduced into Bacillus anthracis Sterne. Activity of the pag promoter was followed by measuring beta-galactosidase activities under various growth and medium conditions. Expression from the pag promoter was observed throughout exponential-phase and was maximal in early stationary phase. The activity of the pag promoter was stimulated by the addition of glucose in the medium.
Cataldi
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Unité de Toxinologie Moléculaire, URA 557, CNRS, Institut Pasteur, Paris, France.
Fouet
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Mock
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D000942:Antigens, Bacterial; D001408:Bacillus anthracis / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development; D001427:Bacterial Toxins / Q000096:biosynthesis / Q000235:genetics; D003001:Cloning, Molecular; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects; D005798:Genes, Bacterial / Q000187:drug effects; D005947:Glucose / Q000494:pharmacology; D005990:Glycerol / Q000494:pharmacology; D007763:Lac Operon; D011401:Promoter Regions, Genetic; D014158:Transcription, Genetic
D000942:Antigens, Bacterial; D001427:Bacterial Toxins; C030325:anthrax toxin; D005947:Glucose; D005990:Glycerol