| Accession | ARO:3003808 |
| CARD Short Name | carO |
| Definition | carO is a transmembrane beta-barrel involved in the influx of carbapenem antibiotics in Acinetobacter baumannii. Disruption of the carO gene by distinct insertion elements results in a loss of carO expression causing resistance to carbapenem antibiotics. Homologs of carO have been identified in genera Acinetobacter, Moraxella and Psychrobacter. |
| AMR Gene Family | CarO porin |
| Drug Class | carbapenem |
| Resistance Mechanism | reduced permeability to antibiotic, resistance by absence |
| Classification | 9 ontology terms | Show + process or component of antibiotic biology or chemistry + antibiotic molecule + mechanism of antibiotic resistance + reduced permeability to antibiotic [Resistance Mechanism] + beta-lactam antibiotic + determinant of antibiotic resistance + resistance by absence [Resistance Mechanism] + protein modulating permeability to antibiotic + carbapenem [Drug Class] |
| Parent Term(s) | 4 ontology terms | Show + confers_resistance_to_antibiotic meropenem [Antibiotic] + confers_resistance_to_antibiotic imipenem [Antibiotic] + gene conferring resistance via absence + CarO porin [AMR Gene Family] |
| Publications | Mussi MA, et al. 2005. Antimicrob Agents Chemother 49(4): 1432-1440. Acquisition of resistance to carbapenems in multidrug-resistant clinical strains of Acinetobacter baumannii: natural insertional inactivation of a gene encoding a member of a novel family of beta-barrel outer membrane proteins. (PMID 15793123) |
Prevalence of carO 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 |
|---|---|---|---|---|
| No prevalence data | ||||
Model Type: protein knockout model
Model Definition: Protein Knockout Models (PKM) reflect resistance by the absence of a gene product, most often deletion of a gene involved in antibiotic import, such as Vibrio cholerae OmpT. Like Protein Homolog Models (PHMs), PKMs include a reference sequence and a bitscore cut-off for detection using BLASTP but instead are designed to only report lack of detection under Perfect or Strict criteria. 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. This model type is still under development and not currently supported by the Resistance Gene Identifier (RGI) software.
Bit-score Cut-off (blastP): 425