Site-directed mutational analysis of the osmotically regulated proU promoter of Salmonella typhimurium |
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Authors: | X Zhang SA Fletcher LN Csonka |
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Affiliation: | Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-1392, USA. |
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Abstract: | We carried out PCR mutagenesis of the proU promoter of Salmonella typhimurium, in order to identify sequences important for its osmotic control. We obtained five mutations in the -35 element: two decreased the promoter strength, one increased it, and the others had no effect. However, none abolished osmotic control, suggesting that the sequence of the -35 element is not crucial for osmotic control. |
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