Article
Mutations in the Bacillus subtilis glnRA operon that cause nitrogen source-dependent defects in regulation of TnrA activity.
Journal of bacteriology - 1 Aug 2002
Fisher Susan H, Wray Lewis V
Abstract excerpt
The Bacillus subtilis nitrogen transcriptional factor TnrA is inactive in cells grown with excess nitrogen, e.g., glutamine or glutamate plus ammonium, because feedback-inhibited glutamine synthetase (product of glnA) binds to TnrA and blocks its DNA-binding activity. Two conditional mutations that allow TnrA-dependent gene expression in cells grown with glutamate plus ammonium, but not in glutamine-grown cells,...
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