| Accession | ARO:3002494 |
| CARD Short Name | SRT-2 |
| Definition | SRT-2, isolated from Serratia marcescens, is a chromosomal beta-lactamase that confers resistance to cefotaxime. |
| AMR Gene Family | SRT beta-lactamase |
| Drug Class | cephalosporin |
| Resistance Mechanism | antibiotic inactivation |
| Resistomes with Perfect Matches | Serratia marcescensg+p+wgs |
| Resistomes with Sequence Variants | Serratia marcescensg+p+wgs |
| Classification | 13 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + determinant of antibiotic resistance + antibiotic inactivation [Resistance Mechanism] + 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 + cephalosporin [Drug Class] + class C beta-lactamase |
| Parent Term(s) | 1 ontology terms | Show + SRT beta-lactamase [AMR Gene Family] |
| Publications | Wu LT, et al. 2004. Diagn Microbiol Infect Dis 49(2): 125-129. Survey of CTX-M-3 extended-spectrum beta-lactamase (ESBL) among cefotaxime-resistant Serratia marcescens at a medical center in middle Taiwan. (PMID 15183862) |
Prevalence of SRT-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 |
|---|---|---|---|---|
| Serratia marcescens | 59.09% | 0.65% | 70.38% | 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): 725