Efficient Biosynthesis of Fungal Polyketides Containing the Dioxabicyclo-octane Ring System

Xu Ming Mao, Zha Jun Zhan, Matthew N. Grayson, Man Cheng Tang, Wei Xu, Yong Quan Li, Wen Bing Yin, Hsiao Ching Lin, Yit Heng Chooi, K. N. Houk, Yi Tang

Research output: Contribution to journalArticlepeer-review

74 Citations (SciVal)


Aurovertins are fungal polyketides that exhibit potent inhibition of adenosine triphosphate synthase. Aurovertins contain a 2,6-dioxabicyclo[3.2.1]octane ring that is proposed to be derived from a polyene precursor through regioselective oxidations and epoxide openings. In this study, we identified only four enzymes required to produce aurovertin E. The core polyketide synthase produces a polyene α-pyrone. Following pyrone O-methylation by a methyltransferase, a flavin-dependent mono-oxygenase and an epoxide hydrolase can iteratively transform the terminal triene portion of the precursor into the dioxabicyclo[3.2.1]octane scaffold. We demonstrate that a tetrahydrofuranyl polyene is the first stable intermediate in the transformation, which can undergo epoxidation and anti-Baldwin 6-endo-tet ring opening to yield the cyclic ether product. Our results further demonstrate the highly concise and efficient ways in which fungal biosynthetic pathways can generate complex natural product scaffolds.

Original languageEnglish
Pages (from-to)11904-11907
Number of pages4
JournalJournal of the American Chemical Society
Issue number37
Early online date4 Sept 2015
Publication statusPublished - 23 Sept 2015

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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