| Accession | ARO:3000892 |
| CARD Short Name | TEM-21 |
| Definition | TEM-21 is an extended-spectrum beta-lactamase found in many species of Gram-negative bacteria. |
| AMR Gene Family | TEM beta-lactamase |
| Drug Class | penam, penem, cephalosporin, monobactam |
| Resistance Mechanism | antibiotic inactivation |
| Classification | 17 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 + penam [Drug Class] + beta-lactamase + penem [Drug Class] + ampicillin [Antibiotic] + class A beta-lactamase + cephalosporin [Drug Class] + monobactam [Drug Class] |
| Parent Term(s) | 2 ontology terms | Show |
| Publications | Tessier F, et al. 1998. Antimicrob Agents Chemother 42(8): 2125-2127. Molecular characterization of a TEM-21 beta-lactamase in a clinical isolate of Morganella morganii. (PMID 9687421) Arlet G, et al. 1995. FEMS Microbiol Lett 134(2-3): 203-208. Molecular characterisation by PCR-restriction fragment length polymorphism of TEM beta-lactamases. (PMID 8586268) Ben Redjeb S, et al. 1990. FEMS Microbiol Lett 55(1-2): 33-38. Two novel transferable extended-spectrum beta-lactamases from Klebsiella pneumoniae in Tunisia. (PMID 2184088) Arlet G, et al. 1999. Antimicrob Agents Chemother 43(4): 969-971. Sequences of the genes for the TEM-20, TEM-21, TEM-22, and TEM-29 extended-spectrum beta-lactamases. (PMID 10103213) |
Prevalence of TEM-21 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 |
|---|---|---|---|---|
| No prevalence data | ||||
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