Accession ARO:3000797
DefinitionMexCD-OprJ is a multidrug efflux protein expressed in the Gram-negative Pseudomonas aeruginosa. MexC is the membrane fusion protein; MexD is the inner membrane transporter; and OprJ is the outer membrane channel. MexAB-OprM is associated with resistance to fluoroquinolones, chloramphenicol, and macrolides. MexCD-OprJ is typically quiescent in wild-type cells, with expression following mutation of the nfxB gene that is divergently transcribed from the mexCD-oprJ operon and encodes a repressor of mexCD-oprJ expression. Expression of mexCD–oprJ is controlled by a single known regulator, the NfxB repressor encoded by the nfxB gene, which is transcribed divergently from the efflux genes.
AMR Gene Familyresistance-nodulation-cell division (RND) antibiotic efflux pump
Drug Classdiaminopyrimidine antibiotic, phenicol antibiotic, aminocoumarin antibiotic, tetracycline antibiotic, fluoroquinolone antibiotic, macrolide antibiotic, cephalosporin, penam
Resistance Mechanismantibiotic efflux
Efflux Componentefflux pump complex or subunit conferring antibiotic resistance
Classification12 ontology terms | Show
Parent Term(s)9 ontology terms | Show
+ resistance-nodulation-cell division (RND) antibiotic efflux pump [AMR Gene Family]
+ confers_resistance_to_drug_class fluoroquinolone antibiotic [Drug Class]
+ confers_resistance_to_antibiotic tetracycline [Antibiotic]
+ confers_resistance_to_antibiotic chloramphenicol [Antibiotic]
+ confers_resistance_to_drug_class macrolide antibiotic [Drug Class]
+ confers_resistance_to_antibiotic novobiocin [Antibiotic]
+ confers_resistance_to_drug_class cephalosporin [Drug Class]
+ confers_resistance_to_drug_class penam [Drug Class]
+ confers_resistance_to_antibiotic trimethoprim [Antibiotic]
8 ontology terms | Show

Srikumar R, et al. 1998. Antimicrob Agents Chemother 42(1): 65-71. Expression of Pseudomonas aeruginosa multidrug efflux pumps MexA-MexB-OprM and MexC-MexD-OprJ in a multidrug-sensitive Escherichia coli strain. (PMID 9449262)