Accession ARO:3000806
DefinitionMexG is a membrane protein required for MexGHI-OpmD efflux activity.
AMR Gene Familyresistance-nodulation-cell division (RND) antibiotic efflux pump
Drug Classfluoroquinolone antibiotic, acridine dye, tetracycline antibiotic
Resistance Mechanismantibiotic efflux
Efflux Componentefflux pump complex or subunit conferring antibiotic resistance
ResistomesPseudomonas aeruginosag+wgs, Pseudomonas fluorescensg+wgs
Classification13 ontology terms | Show
Parent Term(s)2 ontology terms | Show

Schweizer HP. 2003. Genet Mol Res 2(1): 48-62. Efflux as a mechanism of resistance to antimicrobials in Pseudomonas aeruginosa and related bacteria: unanswered questions. (PMID 12917802)

Aendekerk S, et al. 2005. Microbiology 151(PT 4): 1113-1125. The MexGHI-OpmD multidrug efflux pump controls growth, antibiotic susceptibility and virulence in Pseudomonas aeruginosa via 4-quinolone-dependent cell-to-cell communication. (PMID 15817779)


Prevalence of MexG among the sequenced genomes, plasmids, and whole-genome shotgun assemblies available at NCBI for 85 important pathogens (see methodological details and complete list of analyzed pathogens). Values reflect percentage of genomes, plasmids, or whole-genome shotgun assemblies that have at least one hit to the AMR detection model. Default view includes percentages calculated based on Perfect plus Strict RGI hits. Select the checkbox to view percentages based on only Perfect matches to AMR reference sequences curated in CARD (note: this excludes resistance via mutation as references in protein variant models are often wild-type, sensitive sequences).

Prevalence: protein homolog model (view sequences)

SpeciesNCBI ChromosomeNCBI PlasmidNCBI WGS
Citrobacter freundii0%0%0%
Klebsiella pneumoniae0%0%0%
Pseudomonas aeruginosa98.6%0%97.91%
Pseudomonas fluorescens3.7%0%91.09%
Show Perfect Only

Detection Models

Model Type: protein homolog model

Model Definition: The protein homolog model is an AMR detection model. Protein homolog models detect a protein sequence based on its similarity to a curated reference sequence. A protein homolog model has only one parameter: a curated BLASTP bitscore cutoff for determining the strength of a match. Protein homolog model matches to reference sequences are categorized on three criteria: perfect, strict and loose. A perfect match is 100% identical to the reference sequence along its entire length; a strict match is not identical but the bitscore of the matched sequence is greater than the curated BLASTP bitscore cutoff. Loose matches are other sequences with a match bitscore less than the curated BLASTP bitscore.

Bit-score Cut-off (blastP): 260

>gb|AAG07592.1|+|mexG [Pseudomonas aeruginosa PAO1]

>gb|AE004091.2|+|4705956-4706402|mexG [Pseudomonas aeruginosa PAO1]