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Overexpression of div8 increases the production and diversity of divergolides in Streptomyces sp. W112

RSC Advances, ISSN: 2046-2069, Vol: 5, Issue: 119, Page: 98209-98214
2015
  • 26
    Citations
  • 0
    Usage
  • 1
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    26
    • Citation Indexes
      26
  • Captures
    1

Article Description

Isolation and structure elucidation of divergolides from Streptomyces sp. HKI0576 revealed unusual ansamycin diversification reactions and the biosynthetic flexibility of the divergolide family. The production of divergolide E in Streptomyces sp. W112 was previously increased by overexpression of div8, which belongs to ATP-binding regulators of the LuxR family. In this study, we have further characterized the products of the div8-overexpressed mutant and five new divergolide congeners (1-5) were elucidated. Among them, 1-3 features conserved divergolide A skeleton, and 4 and 5 are lactone isomers and seco variant of divergolides E and D, respectively. Divergolides O-S (1-5) showed almost no toxicity to tested human cancer cell lines of MDA-MB-231, PC3 and HeLa at 50 μM. Whereas, 4 and 5 significantly inhibited the secretion of SPI-1 effectors.

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