| Accession | ARO:3000026 |
| CARD Short Name | mepA |
| Definition | MepA is an efflux protein regulated by MepR and part of the MepRAB cluster. Its presence in Staphylococcus aureus led to multidrug resistance, while it has also been shown to decrease tigecycline susceptibility. |
| AMR Gene Family | multidrug and toxic compound extrusion (MATE) transporter |
| Drug Class | tetracycline antibiotic, glycylcycline |
| Resistance Mechanism | antibiotic efflux |
| Efflux Component | efflux pump complex or subunit conferring antibiotic resistance |
| Resistomes with Perfect Matches | Staphylococcus aureusg+p+wgs |
| Resistomes with Sequence Variants | Enterobacter hormaecheiwgs, Escherichia coliwgs, Pseudomonas aeruginosawgs, Serratia marcescenswgs, Staphylococcus aureusg+p+wgs, Staphylococcus epidermidiswgs, Staphylococcus hominiswgs, Stenotrophomonas maltophiliawgs, Streptococcus pneumoniaewgs, Vibrio choleraewgs |
| Classification | 8 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + antibiotic molecule + antibiotic efflux [Resistance Mechanism] + tetracycline antibiotic [Drug Class] + determinant of antibiotic resistance + efflux pump complex or subunit conferring antibiotic resistance [Efflux Component] + glycylcycline [Drug Class] |
| Parent Term(s) | 3 ontology terms | Show + confers_resistance_to_antibiotic tigecycline [Antibiotic] + confers_resistance_to_drug_class glycylcycline [Drug Class] + multidrug and toxic compound extrusion (MATE) transporter [AMR Gene Family] |
| Sub-Term(s) | 1 ontology terms | Show + mepR regulates |
| Publications | McAleese F, et al. 2005. Antimicrob Agents Chemother 49(5): 1865-1871. A novel MATE family efflux pump contributes to the reduced susceptibility of laboratory-derived Staphylococcus aureus mutants to tigecycline. (PMID 15855508) Kaatz GW, et al. 2005. Antimicrob Agents Chemother 49(5): 1857-1864. Multidrug resistance in Staphylococcus aureus due to overexpression of a novel multidrug and toxin extrusion (MATE) transport protein. (PMID 15855507) Kaatz GW, et al. 2006. Antimicrob Agents Chemother 50(4): 1276-1281. MepR, a repressor of the Staphylococcus aureus MATE family multidrug efflux pump MepA, is a substrate-responsive regulatory protein. (PMID 16569840) |
Prevalence of mepA among the sequenced genomes, plasmids, and whole-genome shotgun assemblies available at NCBI or IslandViewer for 377 important pathogens (see methodological details and complete list of analyzed pathogens). Values reflect percentage of genomes, plasmids, genome islands, 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).
| Species | NCBI Chromosome | NCBI Plasmid | NCBI WGS | NCBI GI |
|---|---|---|---|---|
| Enterobacter hormaechei | 0% | 0% | 0.09% | 0% |
| Escherichia coli | 0% | 0% | 0.02% | 0% |
| Pseudomonas aeruginosa | 0% | 0% | 0.02% | 0% |
| Serratia marcescens | 0% | 0% | 0.14% | 0% |
| Staphylococcus aureus | 99.9% | 0.12% | 58.8% | 0% |
| Staphylococcus epidermidis | 0% | 0% | 0.09% | 0% |
| Staphylococcus hominis | 0% | 0% | 1.03% | 0% |
| Stenotrophomonas maltophilia | 0% | 0% | 0.17% | 0% |
| Streptococcus pneumoniae | 0% | 0% | 0.01% | 0% |
| Vibrio cholerae | 0% | 0% | 0.07% | 0% |
Model Type: protein homolog model
Model Definition: Protein Homolog Models (PHM) detect protein sequences based on their similarity to a curated reference sequence, using curated BLASTP bitscore cut-offs. Protein Homolog Models apply to all genes that confer resistance through their presence in an organism, such as the presence of a beta-lactamase gene on a plasmid. PHMs include a reference sequence and a bitscore cut-off for detection using BLASTP. A Perfect RGI match is 100% identical to the reference protein sequence along its entire length, a Strict RGI match is not identical but the bit-score of the matched sequence is greater than the curated BLASTP bit-score cutoff, Loose RGI matches have a bit-score less than the curated BLASTP bit-score cut-off.
Bit-score Cut-off (blastP): 850