Deleting a Chromatin Remodeling Gene Increases the Diversity of Secondary Metabolites Produced by Colletotrichum higginsianum

J Nat Prod. 2019 Apr 26;82(4):813-822. doi: 10.1021/acs.jnatprod.8b00796. Epub 2019 Feb 18.

Abstract

Colletotrichum higginsianum is the causal agent of crucifer anthracnose disease, responsible for important economic losses in Brassica crops. A mutant lacking the CclA subunit of the COMPASS complex was expected to undergo chromatin decondensation and the activation of cryptic secondary metabolite biosynthetic gene clusters. Liquid-state fermentation of the Δ cclA mutant coupled with in situ solid-phase extraction led to the production of three families of compounds, namely, colletorin and colletochlorin derivatives with two new representatives, colletorin D (1) and colletorin D acid (2), the diterpenoid α-pyrone higginsianin family with two new analogues, higginsianin C (3) and 13- epi-higginsianin C (4), and sclerosporide (5) coupling a sclerosporin moiety with dimethoxy inositol.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon-13 Magnetic Resonance Spectroscopy
  • Chromatin Assembly and Disassembly / genetics*
  • Chromatography, High Pressure Liquid
  • Colletotrichum / genetics
  • Colletotrichum / metabolism*
  • Gene Deletion*
  • Genes, Fungal
  • Proton Magnetic Resonance Spectroscopy