Bioconversion of 12-, 14-, and 16-membered ring aglycones to glycosylated macrolides in an engineered strain of Streptomyces venezuelae

Won Seok Jung, Ah Reum Han, Jay Sung Joong Hong, Sung Ryeol Park, Cha Yong Choi, Je Won Park, Yeo Joon Yoon

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27 Citations (Scopus)

Abstract

To develop a system for combinatorial biosynthesis of glycosylated macrolides, Streptomyces venezuelae was genetically manipulated to be deficient in the production of its macrolide antibiotics by deletion of the entire biosynthetic gene cluster encoding the pikromycin polyketide synthases and desosamine biosynthetic enzymes. Two engineered deoxysugar biosynthetic pathways for the biosynthesis of thymidine diphosphate (TDP)-d-quinovose or TDP-d-olivose in conjunction with the glycosyltransferase-auxiliary protein pair DesVII/DesVIII derived from S. venezuelae were expressed in the mutant strain. Feeding the representative 12-, 14-, and 16-membered ring macrolactones including 10-deoxymethynolide, narbonolide, and tylactone, respectively, to each mutant strain capable of producing TDP-d-quinovose or TDP-d-olivose resulted in the successful production of the corresponding quinovose- and olivose-glycosylated macrolides. In mutant strains where the DesVII/DesVIII glycosyltransferase-auxiliary protein pair was replaced by TylMII/TylMIII derived from Streptomyces fradiae, quinovosyl and olivosyl tylactone were produced; however, neither glycosylated 10-deoxymethynolide nor narbonolide were generated, suggesting that the glycosyltransferase TylMII has more stringent substrate specificity toward its aglycones than DesVII. These results demonstrate successful generation of structurally diverse hybrid macrolides using a S. venezuelae in vivo system and provide further insight into the substrate flexibility of glycosyltransferases.

Original languageEnglish
Pages (from-to)1373-1381
Number of pages9
JournalApplied Microbiology and Biotechnology
Volume76
Issue number6
DOIs
Publication statusPublished - 2007 Oct 1
Externally publishedYes

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Keywords

  • Auxiliary protein
  • Combinatorial biosynthesis
  • Glycosyltransferase
  • Macrolide
  • Streptomyces

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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