The transcription factor Ron1 is required for chitin metabolism, asexual development and pathogenicity in Beauveria bassiana, an entomopathogenic fungus
文献类型： 外文期刊
作者： Qiu, Lei 1 ; Song, Ji-Zheng 1 ; Li, Juan 1 ; Zhang, Tong-Sheng 2 ; Li, Ze 2 ; Hu, Shun-Juan 2 ; Liu, Jia-Hua 2 ; Dong, Jing-Chong 2 ; Cheng, Wen 3 ; Wang, Juan-Juan 1 ;
作者机构： 1.Univ Jinan, Sch Biol Sci & Technol, Jinan 250022, Shandong, Peoples R China
2.Qilu Univ Technol, State Key Lab Biobased Mat & Green Papermaking, Shandong Acad Sci, Jinan, Peoples R China
3.Shandong Acad Agr Sci, Maize Res Inst, Jinan, Peoples R China
关键词： Entomopathogenic fungi; Asexual development; Chitin metabolism
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.025； 五年影响因子：7.626 ）
ISSN： 0141-8130
年卷期： 2022 年 206 卷
页码：
收录情况： SCI
摘要： Ndt80-like transcription factor Ron1 is best known for its essential role in the regulation of N-acetylglucosamine (GlcNAc) catabolism. Ron1 was again found to be essential for sensing GlcNAc in Beauveria bassiana. Importantly, our study revealed that Ron1 is involved in the metabolic processes of chitin and asexual development. To further investigate the novel functions of Ron1 in B. bassiana, extracellular chitinase activity in the delta Ron1 mutant was found to decrease by 84.73% compared with wild type. The deletion of Ron1 made it difficult for the fungus to accumulate intracellular GlcNAc. Furthermore, transcriptomic analysis revealed that Ron1 exerted a significant effect on global transcription and positively regulated genes encoding chitin metabolism in respond to chitin nutrition. Yeast one-hybrid assay confirmed that Ron1 could bind to specific cis-acting elements in the promoters of chitinase and hexokinase. In addition, delta Ron1 displayed an impaired chitin component of the cell wall, with a chitin synthetase (ChsVII) predicted to function downstream of Ron1. Finally, the virulence of delta Ron1 mutant was significantly reduced in the Galleria mellonella insect model through cuticle infection or cuticle bypassing infection. These data functionally characterize Ron1 in B. bassiana and expand our understanding of how the transcription factor Ron1 works in pathogens.
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