| Accession | ARO:3003459 |
| CARD Short Name | Mtub_gyrB_FLO |
| Definition | Point mutation in Mycobacterium tuberculosis gyrB resulting in fluoroquinolone resistance. |
| AMR Gene Family | fluoroquinolone resistant gyrB |
| Drug Class | fluoroquinolone antibiotic |
| Resistance Mechanism | antibiotic target alteration |
| Resistomes with Sequence Variants | Mycobacterium aviumg, Mycobacterium tuberculosisg+wgs |
| Classification | 11 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + antibiotic target alteration [Resistance Mechanism] + mutation conferring antibiotic resistance + determinant of antibiotic resistance + antibiotic resistant gene variant or mutant + antibiotic molecule + antibiotic resistant DNA topoisomerase subunit + fluoroquinolone antibiotic [Drug Class] + antibiotic resistant DNA topoisomerase subunit gyrB + fluoroquinolone resistant DNA topoisomerase |
| Parent Term(s) | 13 ontology terms | Show + fluoroquinolone resistant gyrB [AMR Gene Family] + confers_resistance_to_antibiotic enoxacin [Antibiotic] + confers_resistance_to_antibiotic gatifloxacin [Antibiotic] + confers_resistance_to_antibiotic grepafloxacin [Antibiotic] + confers_resistance_to_antibiotic levofloxacin [Antibiotic] + confers_resistance_to_antibiotic lomefloxacin [Antibiotic] + confers_resistance_to_antibiotic moxifloxacin [Antibiotic] + confers_resistance_to_antibiotic nalidixic acid [Antibiotic] + confers_resistance_to_antibiotic norfloxacin [Antibiotic] + confers_resistance_to_antibiotic ofloxacin [Antibiotic] + confers_resistance_to_antibiotic pefloxacin [Antibiotic] + confers_resistance_to_antibiotic sparfloxacin [Antibiotic] + confers_resistance_to_antibiotic trovafloxacin [Antibiotic] |
| Publications | Malik S, et al. 2012. PLoS ONE 7(6):e39754 New insights into fluoroquinolone resistance in Mycobacterium tuberculosis: functional genetic analysis of gyrA and gyrB mutations. (PMID 22761889) Aubry A, et al. 2006. Antimicrob. Agents Chemother. 50(1):104-12 Novel gyrase mutations in quinolone-resistant and -hypersusceptible clinical isolates of Mycobacterium tuberculosis: functional analysis of mutant enzymes. (PMID 16377674) |
Prevalence of Mycobacterium tuberculosis gyrB mutant conferring resistance to fluoroquinolones 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 |
|---|---|---|---|---|
| Mycobacterium avium | 2.44% | 0% | 0% | 0% |
| Mycobacterium tuberculosis | 0.61% | 0% | 1.4% | 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): 1200
Legend:
Published Variants:
PMID in progress (TB): I271M V457L N499T E501D
| PMID: 22761889 | V340L R485C,T539N R485C,T546M D500H N538D N538K N538D,T546M N538T,T546M T539P T539N E540V E540D 39879,G247S+40052,D500N |
| PMID: 16377674 | N510D 39879,A90V+40052,D472H |
ReSeqTB:
| High Confidence | E501D N499T |
| Moderate Confidence | V457L |
| Minimal Confidence | V457L |
| Indeterminate Confidence | I271M |