Abstract:YgfB was recently identified as an enigmatic factor that contributes to β-lactam resistance of multi drug resistant Pseudomonas aeruginosa. We show here that YgfB upregulates the expression of the chromosomally encoded β-lactamase AmpC by antagonizing the function of the regulator of the programmed cell death pathway AlpA. As an anti-terminator, AlpA induces the expression of the alpBCDE lysis genes and the amidase AmpDh3. AmpDh3 activity in turn reduces the levels of cell wall-derived 1,6-anhydro-N-acetylmura… Show more
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