| Accession | ARO:3004730 |
| CARD Short Name | tva(A) |
| Definition | A pleuromutilin resistance gene encoding a predicted ABC-F transporter. The presence of inhibitory or sub-inhibitory concentrations of tiamulin showed that tva(A) confers reduced pleuromutilin susceptibility that does not lead to clinical resistance but facilitates the development of higher-level resistance via mutations in genes encoding ribosome-associated functions. |
| AMR Gene Family | Miscellaneous ABC-F subfamily ATP-binding cassette ribosomal protection proteins |
| Drug Class | pleuromutilin antibiotic |
| Resistance Mechanism | antibiotic target protection |
| Classification | 8 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + determinant of antibiotic resistance + antibiotic target protection [Resistance Mechanism] + antibiotic target protection protein + antibiotic molecule + ABC-F ATP-binding cassette ribosomal protection protein + pleuromutilin antibiotic [Drug Class] |
| Parent Term(s) | 2 ontology terms | Show + confers_resistance_to_antibiotic pleuromutilin [Antibiotic] + Miscellaneous ABC-F subfamily ATP-binding cassette ribosomal protection proteins [AMR Gene Family] |
| Publications | Card RM, et al. 2018. Front Microbiol 9:1183 Identification of a New Antimicrobial Resistance Gene Provides Fresh Insights Into Pleuromutilin Resistance in Brachyspira hyodysenteriae, Aetiological Agent of Swine Dysentery. (PMID 29971045) |
Prevalence of tva(A) 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 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): 1000