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. 1981 May;146(2):621–631. doi: 10.1128/jb.146.2.621-631.1981

A family of r-determinants in Streptomyces spp. that specifies inducible resistance to macrolide, lincosamide, and streptogramin type B antibiotics.

Y Fujisawa, B Weisblum
PMCID: PMC217005  PMID: 6163765

Abstract

Inducible resistance to macrolide, lincosamide, and streptogramin type B antibiotics in Streptomyces spp. comprises a family of diverse phenotypes in which characteristic subsets of the macrolide-lincosamide-streptogramin antibiotics induce resistance mediated by mono- or dimethylation of adenine, or both, in 23S ribosomal ribonucleic acid. In these studies, diverse patterns of induction specificity in Streptomyces and associated ribosomal ribonucleic acid changes are described. In Streptomyces fradiae NRRL 2702 erythromycin induced resistance to vernamycin B, whereas in Streptomyces hygroscopicus IFO 12995, the reverse was found: vernamycin B induced resistance to erythromycin. In a Streptomyces viridochromogenes (NRRL 2860) model system studied in detail, tylosin induced resistance to erythromycin associated with N6-monomethylation of 23S ribosomal ribonucleic acid, whereas in Staphylococcus aureus, erythromycin induced resistance to tylosin mediated by N6-dimethylation of adenine. Inducible macrolide-lincosamide-streptogramin resistance was found in S. fradiae NRRL 2702 and S. hygroscopicus IFO 12995, which synthesize the macrolides tylosin and maridomycin, respectively, as well as in the lincosamide producer Streptomyces lincolnensis NRRL 2936 and the streptogramin type B producer Streptomyces diastaticus NRRL 2560. A wide range of different macrolides including chalcomycin, tylosin, and cirramycin induced resistance when tested in an appropriate system. Lincomycin was active as inducer in S. lincolnensis, the organism by which it is produced, and streptogramin type B antibiotics induced resistance in S. fradiae, S. hygroscopicus, and the streptogramin type B producer S. diastaticus. Patterns of adenine methylation found included (i) lincomycin-induced monomethylation in S. lincolnensis (and constitutive monomethylation in a mutant selected with maridomycin), (ii) concurrent equimolar levels of adenine mono- plus dimethylation in S. hygroscopicus, (iii) monomethylation in S. fradiae (and dimethylation in a mutant selected with erythromycin), and (iv) adenine dimethylation in S. diastaticus induced by ostreogrycin B.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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