Improvement of daptomycin production in Streptomyces roseosporus through the acquisition of pleuromutilin resistance

Biomed Res Int. 2013:2013:479742. doi: 10.1155/2013/479742. Epub 2013 Sep 10.

Abstract

Daptomycin, a cyclic lipopeptide antibiotic produced by Streptomyces roseosporus, displays potent activity against a variety of gram-positive pathogens. There is a demand for generating high-producing strains for industrial production of this valuable antibiotic. Ribosome engineering is a powerful strategy to enhance the yield of secondary metabolites. In this study, the effect of a diterpenoid antibiotic pleuromutilin resistance mutation on daptomycin production was assessed. Spontaneous pleuromutilin-resistant derivatives of S. roseosporus were isolated. Sequencing of rplC locus (encoding the ribosomal protein L3) showed a point mutation at nt 455, resulting in the substitution of glycine with valine. G152V mutants showed increased production of daptomycin by approximately 30% in comparison with the wild-type strain. Its effect on daptomycin production was due to enhanced gene transcription of the daptomycin biosynthetic genes. In conclusion, pleuromutilin could be used as a novel ribosome engineering agent to improve the production of desired secondary metabolites.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Daptomycin / biosynthesis*
  • Diterpenes / administration & dosage
  • Diterpenes / metabolism
  • Drug Resistance, Bacterial / drug effects*
  • Genetic Engineering
  • Mutation
  • Pleuromutilins
  • Polycyclic Compounds
  • Ribosomal Protein L3
  • Ribosomal Proteins / genetics
  • Ribosomes / genetics
  • Streptomyces / drug effects
  • Streptomyces / genetics*
  • Streptomyces / growth & development

Substances

  • Diterpenes
  • Polycyclic Compounds
  • Ribosomal Protein L3
  • Ribosomal Proteins
  • Daptomycin