antibiotic resistance in the Gram-negative bacteria Pseudomonas aeruginosa and
Enterobacteriaceae. AmpC expression is induced by the LysR-type transcriptional regulator
(LTTR) AmpR, which activates ampC expression in response to changes in peptidoglycan
(PG) metabolite levels that occur during exposure to β-lactams. Under normal conditions,
AmpR represses ampC transcription by binding the PG precursor UDP-N-acetylmuramic …