Discovery of the Streptoketides by Direct Cloning and Rapid Heterologous Expression of a Cryptic PKS II Gene Cluster from Streptomyces sp. Tü 6314

J Org Chem. 2020 Jan 17;85(2):664-673. doi: 10.1021/acs.joc.9b02741. Epub 2019 Dec 24.

Abstract

Genome sequencing and bioinformatic analysis have identified numerous cryptic gene clusters that have the potential to produce novel natural products. Within this work, we identified a cryptic type II PKS gene cluster (skt) from Streptomyces sp. Tü 6314. Facilitated by linear plus linear homologous recombination-mediated recombineering (LLHR), we directly cloned the skt gene cluster using the Streptomyces site-specific integration vector pSET152. Direct cloning allowed for rapid heterologous expression in Streptomyces coelicolor, leading to the identification and structural characterization of six polyketides (three known compounds and new streptoketides), four of which exhibit anti-HIV activities. Our study shows that the pSET152 vector can be directly used for LLHR, expanding the Rec/ET direct cloning toolbox and providing the possibility for rapid heterologous expression of gene clusters from Streptomyces.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antiviral Agents / chemistry
  • Antiviral Agents / isolation & purification
  • Antiviral Agents / pharmacology
  • Cell Line
  • Chromatography, High Pressure Liquid / methods
  • Cloning, Molecular
  • Gene Expression Regulation, Bacterial*
  • Microbial Sensitivity Tests
  • Multigene Family*
  • Polyketide Synthases / genetics*
  • Polyketides / chemistry
  • Polyketides / isolation & purification*
  • Polyketides / pharmacology
  • Spectrum Analysis / methods
  • Streptomyces / enzymology*
  • Streptomyces / genetics

Substances

  • Antiviral Agents
  • Polyketides
  • Polyketide Synthases