Extrusion of penem antibiotics by multicomponent efflux systems MexAB-OprM, MexCD-OprJ, and MexXY-OprM of Pseudomonas aeruginosa.
The high intrinsic penem resistance of Pseudomonas aeruginosa is due to the interplay among the outer membrane barrier, the active efflux system MexAB-OprM, and AmpC beta-lactamase. We studied the roles of two other efflux systems, MexCD-OprJ and MexXY-OprM, in penem resistance by overexpressing each system in an AmpC- and MexAB-OprM-deficient background and found that MexAB-OprM is the most important among the three efflux systems for extrusion of penems from the cell interior.
Department of Microbiology, Kyoto Pharmaceutical University, Yamashina, Kyoto 607-8414, Japan.
Kiyomi
K
Okamoto
Naomasa
N
Gotoh
Takeshi
T
Nishino
D001425:Bacterial Outer Membrane Proteins / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics*; D015780:Carbapenems / Q000378:metabolism*; D002352:Carrier Proteins / Q000235:genetics*; D004352:Drug Resistance, Microbial; D016680:Genome, Bacterial; D015151:Immunoblotting; D008565:Membrane Proteins / Q000235:genetics*; D026901:Membrane Transport Proteins / Q000235:genetics*; D008826:Microbial Sensitivity Tests; D009154:Mutation / Q000235:genetics; D010957:Plasmids / Q000235:genetics; D011550:Pseudomonas aeruginosa / Q000187:drug effects* / Q000235:genetics*; D001618:beta-Lactamases / Q000378:metabolism
D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D015780:Carbapenems; D002352:Carrier Proteins; D008565:Membrane Proteins; D026901:Membrane Transport Proteins; C118598:MexA protein, Pseudomonas aeruginosa; C118597:MexB protein, Pseudomonas aeruginosa; C470189:MexC protein, Pseudomonas aeruginosa; C121980:MexD protein, Pseudomonas aeruginosa; C402791:MexXY protein, Pseudomonas aeruginosa; C470190:OprJ protein, Pseudomonas aeruginosa; C402263:OprM protein, Pseudomonas aeruginosa; C048795:AmpC beta-lactamases; D001618:beta-Lactamases