| Accession | ARO:3000535 |
| Synonym(s) | pvdT |
| CARD Short Name | macB |
| Definition | MacB is an ATP-binding cassette (ABC) transporter that exports macrolides with 14- or 15- membered lactones. It forms an antibiotic efflux complex with MacA and TolC. macB corresponds to 1 locus in Pseudomonas aeruginosa PAO1 and 1 locus in Pseudomonas aeruginosa LESB58. |
| AMR Gene Family | ATP-binding cassette (ABC) antibiotic efflux pump |
| Drug Class | macrolide antibiotic |
| Resistance Mechanism | antibiotic efflux |
| Efflux Component | efflux pump complex or subunit conferring antibiotic resistance |
| Resistomes with Perfect Matches | Neisseria gonorrhoeaeg+wgs |
| Resistomes with Sequence Variants | Neisseria gonorrhoeaeg+wgs |
| Classification | 9 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + antibiotic molecule + determinant of antibiotic resistance + antibiotic efflux [Resistance Mechanism] + macrolide antibiotic [Drug Class] + efflux pump complex or subunit conferring antibiotic resistance [Efflux Component] + ATP-binding cassette (ABC) antibiotic efflux pump [AMR Gene Family] + erythromycin [Antibiotic] |
| Parent Term(s) | 2 ontology terms | Show |
| Publications | Xu Y, et al. 2009. Biochemistry 48(23): 5218-5225. Crystal structure of the periplasmic region of MacB, a noncanonic ABC transporter. (PMID 19432486) Kobayashi N, et al. 2003. FEBS Lett 546(2-3): 241-246. Membrane topology of ABC-type macrolide antibiotic exporter MacB in Escherichia coli. (PMID 12832048) Nishino K, et al. 2005. Mol Microbiol 59(1): 126-141. Virulence and drug resistance roles of multidrug efflux systems of Salmonella enterica serovar Typhimurium. (PMID 16359323) |
Prevalence of macB among the sequenced genomes, plasmids, and whole-genome shotgun assemblies available at NCBI or IslandViewer for 413 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 |
|---|---|---|---|---|
| Neisseria gonorrhoeae | 7.5% | 0% | 1.89% | 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): 1280
