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  • Title: Cloning and characterization of two genes from Streptomyces lividans that confer inducible resistance to lincomycin and macrolide antibiotics.
    Author: Jenkins G, Cundliffe E.
    Journal: Gene; 1991 Dec 01; 108(1):55-62. PubMed ID: 1761231.
    Abstract:
    Inducible resistance to lincomycin and macrolides in Streptomyces lividans TK21 results from expression of two linked genes: lrm, encoding a ribosomal RNA methyltransferase that confers high-level resistance to lincomycin with lower levels of resistance to macrolides, and mgt, encoding a glycosyl transferase that specifically inactivates macrolides using UDP-glucose as cofactor. The lrm and mgt genes have been cloned and sequenced. The deduced lrm product is a 26-kDa protein with much similarity to other ribosomal RNA methyltransferases, such as the carB, tlrA and ermE products, whereas the mgt product (predicted to be 42 kDa) resembles a eukaryotic glycosyl transferase. Macrolides that induce the lrm-mgt gene pair are substrates for inactivation by the mgt product, and the lrm product confers ribosomal resistance to such inducers.
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