Involvement of BbTpc1, an important Zn(II)(2)Cys(6) transcriptional regulator, in chitin biosynthesis, fungal development and virulence of an insect mycopathogen

文献类型： 外文期刊

第一作者： Qiu, Lei

作者： Qiu, Lei;Zhang, Jing;Song, Ji-Zheng;Hu, Shun-Juan;Zhang, Tong-Sheng;Li, Ze;Wang, Juan-Juan;Song, Ji-Zheng;Cheng, Wen

作者机构：

关键词： Entomopathogenic fungi; Zn(II)(2)Cys(6); Septation patterns; Virulence; Chitin synthesis; Transctiption factor

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）

ISSN： 0141-8130

年卷期： 2021 年 166 卷

页码：

收录情况： SCI

摘要： Chitin is one of the major components of the fungal cell wall and contributes to the mechanical strength and shape of the fungal cell. Zn(II)(2)Cys(6) transcription factors are unique to the fungal kingdom and have a variety of functions in some fungi. However, the mechanisms by which Zn(II)(2)Cys(6) proteins affect entomopathogenic fungi are largely unknown. Here, we characterized the Zn(II)(2)Cys(6) transcription factor BbTpc1 in the insect pathogenic fungus Beauveria bassiana. Disruption of BbTpc1 resulted in a distinct changes in vegetative growth and septa tion patterns, and a significant decrease in conidia and blastospore yield. The Delta BbTpc1 mutant displayed impaired resistance to chemical stresses and heat shock and attenuated virulence in topical and intrahemocoel injection assays. Importantly, the Delta BbTpc1 mutant had an abnormal cell wall with altered wall thickness and chitin synthesis, which were accompanied by transcriptional repression of the chitin synthetase family genes. In addition, comparative transcriptomics revealed that deletion of BbTpc1 altered fungal asexual reproduction via different genetic pathways. These data revealed that BbTpc1 regulates fungal development, chitin synthesis and biological control potential in B. bassiana. (C) 2020 Elsevier B.V. All rights reserved.

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