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  • Title: Methylation of 23S rRNA caused by tlrA (ermSF), a tylosin resistance determinant from Streptomyces fradiae.
    Author: Zalacain M, Cundliffe E.
    Journal: J Bacteriol; 1989 Aug; 171(8):4254-60. PubMed ID: 2753855.
    Abstract:
    Ribosomes from Streptomyces griseofuscus expressing tlrA, a resistance gene isolated from the tylosin producer Streptomyces fradiae, are resistant to macrolide and lincosamide antibiotics in vitro. The tlrA product was found to be a methylase that introduces two methyl groups into a single base within 23S rRNA, generating N6,N6-dimethyladenine at position 2058. This activity is therefore similar to the ermE resistance mechanism in Saccharopolyspora erythraea (formerly Streptomyces erythraeus).
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