Accession ARO:3000326
CARD Short NameErmE
DefinitionErmE is a methyltransferase found in the erythromycin producer Saccharopolyspora erythraea. Like other Erm enzymes, it catalyzes the methylation of A2058 of the 23S ribosomal RNA. The gene is found within the erythromycin biosynthetic cluster and is responsible for self-resistance.
AMR Gene FamilyErm 23S ribosomal RNA methyltransferase
Drug Classstreptogramin antibiotic, macrolide antibiotic, streptogramin A antibiotic, streptogramin B antibiotic, lincosamide antibiotic
Resistance Mechanismantibiotic target alteration
Classification14 ontology terms | Show
Parent Term(s)25 ontology terms | Show
+ Erm 23S ribosomal RNA methyltransferase [AMR Gene Family]
+ confers_resistance_to_antibiotic erythromycin [Antibiotic]
+ confers_resistance_to_antibiotic roxithromycin [Antibiotic]
+ confers_resistance_to_antibiotic telithromycin [Antibiotic]
+ confers_resistance_to_antibiotic clarithromycin [Antibiotic]
+ confers_resistance_to_antibiotic tylosin [Antibiotic]
+ confers_resistance_to_antibiotic spiramycin [Antibiotic]
+ confers_resistance_to_antibiotic azithromycin [Antibiotic]
+ confers_resistance_to_antibiotic dirithromycin [Antibiotic]
+ confers_resistance_to_antibiotic dalfopristin [Antibiotic]
+ confers_resistance_to_antibiotic griseoviridin [Antibiotic]
+ confers_resistance_to_antibiotic madumycin II [Antibiotic]
+ confers_resistance_to_antibiotic virginiamycin M1 [Antibiotic]
+ confers_resistance_to_antibiotic ostreogrycin B3 [Antibiotic]
+ confers_resistance_to_antibiotic patricin A [Antibiotic]
+ confers_resistance_to_antibiotic patricin B [Antibiotic]
+ confers_resistance_to_antibiotic pristinamycin IA [Antibiotic]
+ confers_resistance_to_antibiotic pristinamycin IB [Antibiotic]
+ confers_resistance_to_antibiotic quinupristin [Antibiotic]
+ confers_resistance_to_antibiotic pristinamycin IC [Antibiotic]
+ confers_resistance_to_antibiotic vernamycin C [Antibiotic]
+ confers_resistance_to_antibiotic virginiamycin S2 [Antibiotic]
+ confers_resistance_to_antibiotic lincomycin [Antibiotic]
+ confers_resistance_to_antibiotic clindamycin [Antibiotic]
+ confers_resistance_to_antibiotic oleandomycin [Antibiotic]

Villsen ID, et al. 1999. J Mol Biol 286(2): 365-374. ErmE methyltransferase recognizes features of the primary and secondary structure in a motif within domain V of 23 S rRNA. (PMID 9973557)

Vester B, et al. 1998. J Mol Biol 282(2): 255-264. ErmE methyltransferase recognition elements in RNA substrates. (PMID 9735285)

Vester B and Douthwaite S. 1994. J Bacteriol 176(22): 6999-7004. Domain V of 23S rRNA contains all the structural elements necessary for recognition by the ErmE methyltransferase. (PMID 7961464)

Katz L, et al. 1987. Gene 55(2-3): 319-325. Expression of the macrolide-lincosamide-streptogramin-B-resistance methylase gene, ermE, from Streptomyces erythraeus in Escherichia coli results in N6-monomethylation and N6,N6-dimethylation of ribosomal RNA. (PMID 3117622)

Liu M, et al. 2002. Antimicrob Agents Chemother 46(6): 1629-1633. Activity of the ketolide telithromycin is refractory to Erm monomethylation of bacterial rRNA. (PMID 12019067)


Prevalence of ErmE 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).

Prevalence: protein homolog model

SpeciesNCBI ChromosomeNCBI PlasmidNCBI WGSNCBI GI
No prevalence data

Detection Models

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): 400

>gb|CAB60001.1|+|ErmE [Saccharopolyspora erythraea NRRL 2338]

>gb|X51891.1|+|190-1335|ErmE [Saccharopolyspora erythraea NRRL 2338]