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Overexpression of Global Regulator Talae1 Leads to the Discovery of New Antifungal Polyketides From Endophytic Fungus Trichoderma afroharzianum

文献类型： 外文期刊

作者： Ding, Zhuang 1 ; Wang, Xiao 1 ; Kong, Fan-Dong 2 ; Huang, Hui-Ming 3 ; Zhao, Yan-Na 1 ; Liu, Min 1 ; Wang, Zheng-Ping; 1 ;

作者机构： 1.Liaocheng Univ, Inst Biopharmaceut Res, Liaocheng, Shandong, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Hainan Key Lab Res & Dev Nat Prod Li Folk Med, Haikou, Hainan, Peoples R China

3.Liaocheng Univ, Sch Life Sci, Liaocheng, Shandong, Peoples R China

关键词： global regulator; LaeA; polyketides; antifungal activity; endophytic fungi; Trichoderma afroharzianum

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN： 1664-302X

年卷期： 2020 年 11 卷

页码：

收录情况： SCI

摘要： Transcription regulation caused by global regulators exerts important effects on fungal secondary metabolism. By overexpression of the global regulator Talae1 in a Ficus elastica-associated fungus Trichoderma afroharzianum, two structurally new polyketides (1 and 2) that were newly produced in the transformant were isolated and identified. Their structures, including the absolute configurations, were elucidated through a combination of high resolution mass spectrometer (HRMS), NMR, and electronic circular dichroism (ECD) calculations. The growth inhibitory activities of compounds 1 and 2 were evaluated against four bacteria and six plant-pathogenic fungi. Compound 1 showed the highest antifungal activity against Botrytis cinerea and Fusarium oxysporum f. sp. nicotianae with MIC of 8 mu g/ml. To the best of our knowledge, this is the first study to report on the application of the global regulator in T. afroharzianum to activate the biosynthesis of bioactive secondary metabolites.

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