The tyrosine repressor negatively regulates aroH expression in Escherichia coli.
نویسندگان
چکیده
The levels of the tryptophan-sensitive isoenzyme of 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase of Escherichia coli, encoded by the aroH gene, were elevated in tyrR and/or trpR mutants. The effect of tyrR and trpR lesions on aroH expression was confirmed by using a lacZ reporter system. The mutational elimination of either repressor led to a threefold increase in beta-galactosidase.
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ورودعنوان ژورنال:
- Journal of bacteriology
دوره 173 12 شماره
صفحات -
تاریخ انتشار 1991