Pseudomonas aeruginosa ampR with mutation conferring resistance to aztreonam

Accession ARO:3007491
CARD Short NamePaer_ampR_ATM
DefinitionampR is a regulatory gene that plays an essential role in regulating antibiotic resistance in P. aeruginosa. Mutation in ampR leads to its loss of control over blaPDC-16, allowing overexpression of blaPDC-16 and further resistance to aztreonam.
AMR Gene FamilyPDC beta-lactamase, ampC-type beta-lactamase
Drug Classcarbapenem, cephalosporin, monobactam, penam
Resistance Mechanismantibiotic inactivation
Classification17 ontology terms | Show
Parent Term(s)3 ontology terms | Show
+ ampC-type beta-lactamase [AMR Gene Family]
+ confers_resistance_to_antibiotic aztreonam [Antibiotic]
+ regulates PDC-16

Ding L, et al. 2023. Microbiol Spectr :e0308022 In Vivo Development of Aztreonam Resistance in Meropenem-Resistant Pseudomonas aeruginosa Owing to Overexpression of the blaPDC-16. (PMID 37070974)


Prevalence of Pseudomonas aeruginosa ampR with mutation conferring resistance to aztreonam 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 variant model

SpeciesNCBI ChromosomeNCBI PlasmidNCBI WGSNCBI GI
No prevalence data

Detection Models

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): 500


  • discovered in clinical, agricultural, or environmental isolates

  • discovered via laboratory selection experiments

  • ReSeqTB

Published Variants:

PMID: 37070974D135N D135G

>gb|P24734.3|-|Pseudomonas aeruginosa ampR with mutation conferring resistance to aztreonam [Pseudomonas aeruginosa PAO1]

>gb|AE004091.2|-|4592990-4593880|Pseudomonas aeruginosa ampR with mutation conferring resistance to aztreonam [Pseudomonas aeruginosa PAO1]