Accession ARO:3005114
CARD Short NameAAC(6')-Ib-cr4
DefinitionA fluoroquinolone-acetylating aminoglycoside acetyltransferase variant identified from Enterobacter. These proteins confer resistance to both fluoroquinolone and aminoglycoside antibiotics.
AMR Gene FamilyAAC(6'), AAC(6')-Ib-cr
Drug Classaminoglycoside antibiotic, fluoroquinolone antibiotic
Resistance Mechanismantibiotic inactivation
Resistomes with Perfect MatchesEnterobacter hormaecheiwgs
Resistomes with Sequence VariantsAeromonas hydrophilawgs, Enterobacter hormaecheiwgs, Escherichia coliwgs, Klebsiella pneumoniaep+wgs, Klebsiella quasipneumoniaewgs, Providencia rettgeriwgs, Salmonella entericawgs, Serratia marcescenswgs
Classification12 ontology terms | Show
Parent Term(s)5 ontology terms | Show
+ AAC(6')-Ib-cr [AMR Gene Family]
+ confers_resistance_to_antibiotic kanamycin A [Antibiotic]
+ confers_resistance_to_antibiotic amikacin [Antibiotic]
+ confers_resistance_to_antibiotic ciprofloxacin [Antibiotic]
+ confers_resistance_to_antibiotic tobramycin [Antibiotic]

de Toro M, et al. 2013. J Antimicrob Chemother 68(6):1277-80 pMdT1, a small ColE1-like plasmid mobilizing a new variant of the aac(6')-Ib-cr gene in Salmonella enterica serovar Typhimurium. (PMID 23361643)


Prevalence of AAC(6')-Ib-cr4 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).

Prevalence: protein homolog model (view sequences)

SpeciesNCBI ChromosomeNCBI PlasmidNCBI WGSNCBI GI
Aeromonas hydrophila0%0%0.81%0%
Enterobacter hormaechei0%0%0.26%0%
Escherichia coli0%0%0.04%0%
Klebsiella pneumoniae0%0.01%0.1%0%
Klebsiella quasipneumoniae0%0%0.13%0%
Providencia rettgeri0%0%1.91%0%
Salmonella enterica0%0%0.01%0%
Serratia marcescens0%0%0.13%0%
Show Perfect Only

Detection Models

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): 300

>gb|KJX28101.1|+|AAC(6')-Ib-cr4 [Enterobacter hormaechei subsp. steigerwaltii]

>gb|JZKY01000061.1|+|788-1366|AAC(6')-Ib-cr4 [Enterobacter hormaechei subsp. steigerwaltii]