| Accession | ARO:3001865 |
| CARD Short Name | CTX-M-2 |
| Definition | CTX-M-2 is a beta-lactamase found in the Enterobacteriaceae family. |
| AMR Gene Family | CTX-M beta-lactamase |
| Drug Class | cephalosporin |
| Resistance Mechanism | antibiotic inactivation |
| Resistomes with Perfect Matches | Acinetobacter baumanniiwgs, Aeromonas hydrophilawgs, Citrobacter koseriwgs, Enterobacter cloacaeg+p, Enterobacter hormaecheip+wgs, Escherichia colig+p+wgs, Klebsiella aerogeneswgs, Klebsiella pneumoniaeg+p+wgs, Klebsiella quasipneumoniaep+wgs, Leclercia adecarboxylatawgs, Morganella morganiiwgs, Proteus mirabilisg+wgs+gi, Providencia rettgeriwgs, Providencia stuartiiwgs, Pseudomonas aeruginosawgs, Salmonella entericap+wgs, Serratia marcescenswgs, Vibrio choleraep+wgs |
| Resistomes with Sequence Variants | Acinetobacter baumanniiwgs, Aeromonas hydrophilawgs, Citrobacter koseriwgs, Enterobacter cloacaeg+p, Enterobacter hormaecheip+wgs, Escherichia colig+p+wgs, Klebsiella aerogeneswgs, Klebsiella pneumoniaeg+p+wgs, Klebsiella quasipneumoniaep+wgs, Leclercia adecarboxylatawgs, Morganella morganiiwgs, Proteus mirabilisg+wgs+gi, Providencia rettgeriwgs, Providencia stuartiiwgs, Pseudomonas aeruginosawgs, Salmonella entericap+wgs, Serratia marcescenswgs, Vibrio choleraep+wgs |
| Classification | 13 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + determinant of antibiotic resistance + antibiotic molecule + antibiotic inactivation [Resistance Mechanism] + antibiotic inactivation enzyme + hydrolysis of antibiotic conferring resistance + beta-lactam antibiotic + cephem + hydrolysis of beta-lactam antibiotic by serine beta-lactamase + beta-lactamase + class A beta-lactamase + cephalosporin [Drug Class] |
| Parent Term(s) | 1 ontology terms | Show + CTX-M beta-lactamase [AMR Gene Family] |
| Publications | Bauernfeind A, et al. 1996. Antimicrob Agents Chemother 40(2): 509-513. Sequences of beta-lactamase genes encoding CTX-M-1 (MEN-1) and CTX-M-2 and relationship of their amino acid sequences with those of other beta-lactamases. (PMID 8834913) |
Prevalence of CTX-M-2 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 |
|---|---|---|---|---|
| Acinetobacter baumannii | 0% | 0% | 0.04% | 0% |
| Aeromonas hydrophila | 0% | 0% | 0.81% | 0% |
| Citrobacter koseri | 0% | 0% | 3.6% | 0% |
| Enterobacter cloacae | 1.79% | 0.56% | 0% | 0% |
| Enterobacter hormaechei | 0% | 0.06% | 0.09% | 0% |
| Escherichia coli | 0.02% | 0.01% | 0.2% | 0% |
| Klebsiella aerogenes | 0% | 0% | 0.56% | 0% |
| Klebsiella pneumoniae | 0.12% | 0.14% | 0.8% | 0% |
| Klebsiella quasipneumoniae | 0% | 0.42% | 0.13% | 0% |
| Leclercia adecarboxylata | 0% | 0% | 2.33% | 0% |
| Morganella morganii | 0% | 0% | 0.61% | 0% |
| Proteus mirabilis | 0.92% | 0% | 1.16% | 3.7% |
| Providencia rettgeri | 0% | 0% | 0.64% | 0% |
| Providencia stuartii | 0% | 0% | 4.55% | 0% |
| Pseudomonas aeruginosa | 0% | 0% | 0.1% | 0% |
| Salmonella enterica | 0% | 0.11% | 0.16% | 0% |
| Serratia marcescens | 0% | 0% | 0.39% | 0% |
| Vibrio cholerae | 0% | 5.26% | 0.06% | 0% |
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): 500