September 22, 2019  |  

Genome mining for fungal polyketide-diterpenoid hybrids: discovery of key terpene cyclases and multifunctional P450s for structural diversification

Authors: Wang, Wei-Guang and Du, Lian-Qiong and Sheng, Shan-Ling and Li, Ao and Li, Yan-Ping and Cheng, Gui-Guang and Li, Gan-Peng and Sun, Guiling and Hu, Qiu-Fen and Matsuda, Yudai

A biosynthetic gene cluster for chevalone E (1) and its oxidized derivatives have been identified within the genome of the endophytic fungus Aspergillus versicolor 0312, by a mining strategy targeting a polyke- tide-diterpenoid hybrid molecule. The biosynthetic pathway has been successfully reconstituted in the heterologous fungus Aspergillus oryzae. Interestingly, two P450 monooxygenases, Cle2 and Cle4, were found to transform 1 into seven new analogues including 7 and 8 that possess a unique five-membered lactone ring. Furthermore, the replacement of the terpene cyclase gene with that from another fungus led to the production of sartorypyrone D (11), which has a monocyclic terpenoid moiety. Finally, some of the compounds obtained in this study synergistically enhanced the cytotoxicity of doxorubicin (DOX) in breast cancer cells.

Journal: Organic chemistry frontiers
DOI: 10.1039/c8qo01124a
Year: 2018

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