| Accession | ARO:3003582 |
| CARD Short Name | basR |
| Definition | Response regulator for Lipid A modification genes; two-component system involved in polymyxin resistance that senses high extracellular Fe(2+). |
| AMR Gene Family | pmr phosphoethanolamine transferase |
| Drug Class | peptide antibiotic |
| Resistance Mechanism | antibiotic target alteration, antibiotic efflux |
| Efflux Regulator | protein(s) and two-component regulatory system modulating antibiotic efflux |
| Resistomes with Sequence Variants | Pseudomonas aeruginosag+p+wgs, Pseudomonas fluorescensg |
| Classification | 19 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + antibiotic molecule + antibiotic target alteration [Resistance Mechanism] + charge alteration conferring antibiotic resistance + peptide antibiotic [Drug Class] + determinant of antibiotic resistance + gene altering cell wall charge + lipopeptide antibiotic + phosphoethanolamine transferase conferring colistin resistance + antibiotic mixture + polymyxin antibiotic + pmr phosphoethanolamine transferase [AMR Gene Family] + polymyxin B [Antibiotic] + antibiotic efflux [Resistance Mechanism] + PmrF + ugd + arnA + protein(s) and two-component regulatory system modulating antibiotic efflux [Efflux Regulator] |
| Parent Term(s) | 3 ontology terms | Show + protein of two-component regulatory system modulating antibiotic efflux + regulates eptA + part_of basRS |
| Publications | Lean SS, et al. 2014. ISRN Microbiol 2014: 953417. Prevalence and Genetic Characterization of Carbapenem- and Polymyxin-Resistant Acinetobacter baumannii Isolated from a Tertiary Hospital in Terengganu, Malaysia. (PMID 25006521) Lee JY, et al. 2014. Diagn Microbiol Infect Dis 78(3): 271-276. Mutations and expression of PmrAB and PhoPQ related with colistin resistance in Pseudomonas aeruginosa clinical isolates. (PMID 24412662) |
Prevalence of basR among the sequenced genomes, plasmids, and whole-genome shotgun assemblies available at NCBI or IslandViewer for 414 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 | GRDI-AMR2 |
|---|---|---|---|---|---|
| Pseudomonas aeruginosa | 63.96% | 0.29% | 69.68% | 0% | 0% |
| Pseudomonas fluorescens | 2.78% | 0% | 0% | 0% | 0% |
Model Type: protein variant model
Model Definition: Protein Variant Models (PVM) perform a similar search as Protein Homolog Models (PHM), i.e. detect protein sequences based on their similarity to a curated reference sequence, but secondarily screen query sequences for curated sets of mutations to differentiate them from antibiotic susceptible wild-type alleles. PVMs are designed to detect AMR acquired via mutation of house-keeping genes or antibiotic targets, e.g. a mutated gyrase resistant to aminocoumarin antibiotics. PVMs include a protein reference sequence (often from antibiotic susceptible wild-type alleles), a curated bit-score cut-off, and mapped resistance variants. Mapped resistance variants may include any or all of single point mutations, insertions, or deletions curated from the scientific literature. A Strict RGI match has a BLASTP bit-score above the curated BLASTP cutoff value and contains at least one curated mutation from amongst the mapped resistance variants, while a Loose RGI match has a bit-score less than the curated BLASTP bit-score cut-off but still contains at least one curated mutation from amongst the mapped resistance variants.
Bit-score Cut-off (blastP): 375
PubMed: mutation data hand curated from the scientific literature, evaluated as conferring resistance (R). CRyPTIC: mutation data acquired from the CRyPTIC catalog, evaluated as resistant (R), susceptible (S), or undetermined (U). ReSeqTB: mutation data acquired from the ReSeqTB catalog, evaluated as conferring resistance (Minimal, Moderate, High), not conferring resistance (None), or Indeterminate. WHO: mutation data acquired from the WHO 2023 catalog, evaluated as resistant (R), susceptible (S), or undetermined (U).| Mutation | Mutation type | PubMed |
|---|---|---|
| L71R | single resistance variant | PMID:24412662 |
| L157Q | single resistance variant | PMID:24412662 |
| Curator | Description | Most Recent Edit |
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