confers_resistance_to_antibiotic erythromycin confers_resistance_to_antibiotic Erm 23S ribosomal RNA methyltransferase josamycin ErmW antibiotic_resistance ErmW is a methyltransferase found in the mycinamicin producer Micromonospora griseorubida. Like other Erm enzymes, it catalyzes the methylation of A2058 of the 23S ribosomal RNA. The gene is found within the mycinamicin biosynthetic cluster and is responsible for self-resistance. ARO:3001306 ErmW myrB