| Accession | ARO:3001301 |
| CARD Short Name | RlmA(II) |
| Definition | RlmA(II) is a methyltransferase found in Streptococcus pneumoniae and confers resistance to tylosin and mycinamicin. Specifically, this enzyme adds a methyl group to guanosine 748 (E. coli numbering) of 23S ribosomal RNA. |
| AMR Gene Family | non-erm 23S ribosomal RNA methyltransferase (G748) |
| Drug Class | macrolide antibiotic, lincosamide antibiotic |
| Resistance Mechanism | antibiotic target alteration |
| Resistomes with Perfect Matches | Streptococcus pneumoniaeg+wgs |
| Resistomes with Sequence Variants | Streptococcus pneumoniaeg+wgs |
| Classification | 11 ontology terms | Show + process or component of antibiotic biology or chemistry + mechanism of antibiotic resistance + determinant of antibiotic resistance + antibiotic target alteration [Resistance Mechanism] + antibiotic target modifying enzyme + ribosomal alteration conferring antibiotic resistance + antibiotic molecule + rRNA methyltransferase conferring antibiotic resistance + macrolide antibiotic [Drug Class] + 23S ribosomal RNA methyltransferase + lincosamide antibiotic [Drug Class] |
| Parent Term(s) | 4 ontology terms | Show + non-erm 23S ribosomal RNA methyltransferase (G748) [AMR Gene Family] + gene involved in self-resistance to antibiotic + confers_resistance_to_antibiotic tylosin [Antibiotic] + confers_resistance_to_antibiotic mycinamicin [Antibiotic] |
| Publications | Lebars I, et al. 2003. EMBO J 22(2): 183-192. Structure of 23S rRNA hairpin 35 and its interaction with the tylosin-resistance methyltransferase RlmAII. (PMID 12514124) Douthwaite S, et al. 2008. J Mol Biol 378(5): 969-975. Interaction of the tylosin-resistance methyltransferase RlmA II at its rRNA target differs from the orthologue RlmA I. (PMID 18406425) |
Prevalence of RlmA(II) 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 |
|---|---|---|---|---|
| Streptococcus pneumoniae | 99.03% | 0% | 94.02% | 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): 550