| Accession | ARO:3001864 |
| Synonym(s) | MEN-1 |
| CARD Short Name | CTX-M-1 |
| Definition | CTX-M-1 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 | Escherichia colig+p+wgs, Escherichia fergusoniiwgs, Klebsiella aerogeneswgs, Klebsiella michiganensisp, Klebsiella oxytocawgs, Klebsiella pneumoniaep+wgs, Proteus mirabiliswgs, Salmonella entericawgs, Shigella flexneriwgs, Shigella sonneiwgs |
| Resistomes with Sequence Variants | Escherichia colig+p+wgs, Escherichia fergusoniiwgs, Klebsiella aerogeneswgs, Klebsiella michiganensisp, Klebsiella oxytocawgs, Klebsiella pneumoniaep+wgs, Proteus mirabiliswgs, Salmonella entericawgs, Shigella flexneriwgs, Shigella sonneiwgs |
| Classification | 13 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + antibiotic inactivation [Resistance Mechanism] + determinant of antibiotic resistance + antibiotic molecule + antibiotic inactivation enzyme + beta-lactam antibiotic + hydrolysis of antibiotic conferring resistance + cephem + beta-lactamase + hydrolysis of beta-lactam antibiotic by serine beta-lactamase + class A beta-lactamase + cephalosporin [Drug Class] |
| Parent Term(s) | 1 ontology terms | Show + CTX-M beta-lactamase [AMR Gene Family] |
| Sub-Term(s) | 2 ontology terms | Show + tazobactam [Adjuvant] is_small_molecule_inhibitor + clavulanic acid [Adjuvant] is_small_molecule_inhibitor |
| 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-1 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 |
|---|---|---|---|---|
| Escherichia coli | 0.1% | 0.32% | 1.37% | 0% |
| Escherichia fergusonii | 0% | 0% | 1.09% | 0% |
| Klebsiella aerogenes | 0% | 0% | 0.56% | 0% |
| Klebsiella michiganensis | 0% | 2.29% | 0% | 0% |
| Klebsiella oxytoca | 0% | 0% | 0.42% | 0% |
| Klebsiella pneumoniae | 0% | 0.01% | 0.1% | 0% |
| Proteus mirabilis | 0% | 0% | 0.33% | 0% |
| Salmonella enterica | 0% | 0% | 0.03% | 0% |
| Shigella flexneri | 0% | 0% | 0.16% | 0% |
| Shigella sonnei | 0% | 0% | 0.15% | 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