Title : Production of Norspermidine Contributes to Aminoglycoside Resistance in pmrAB Mutants of Pseudomonas aeruginosa.

Pub. Date : 2019 Oct

PMID : 31383668






2 Functional Relationships(s)
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1 As shown by gene deletion experiments, the decreased susceptibility of the mutants to aminoglycosides was independent from operon arn but required the efflux system MexXY(OprM) and the products of three genes, PA4773-PA4774-PA4775, that are cotranscribed and activated with genes pmrAB Gene PA4773 (annotated as speD2 in PAO1 genome) and PA4774 (speE2) are predicted to encode enzymes involved in biosynthesis of polyamines. Aminoglycosides outer membrane protein OprM Pseudomonas aeruginosa PAO1
2 Altogether, our results suggest that norspermidine decreases the self-promoted uptake pathway of aminoglycosides across the outer membrane and thereby potentiates the activity of efflux pump MexXY(OprM). Aminoglycosides outer membrane protein OprM Pseudomonas aeruginosa PAO1