数字农科院2.0

Disruption of the Trichoderma reesei gul1 gene stimulates hyphal branching and reduces broth viscosity in cellulase production

文献类型： 外文期刊

作者： Zhao Qinqin;Liu Qin;Wang Qi;Qin Yuqi;Zhong Yaohua;Gao Liwei;Liu Guodong;Qu Yinbo

作者机构：

关键词： Trichoderma reesei; Cellulase; Filamentous fungus; Hyphal morphology; Protein production

期刊名称： Journal of industrial microbiology & biotechnology

ISSN： 1476-5535

年卷期： 2021 年 48 卷 1-2 期

页码：

收录情况： JCR（2021版）

摘要： Hyphal morphology is considered to have a close relationship with the production level of secreted proteins by filamentous fungi. In this study, the gul1 gene, which encodes a putative mRNA-binding protein, was disrupted in cellulase-producing fungus Trichoderma reesei. The hyphae of Δgul1 strain produced more lateral branches than the parent strain. Under the condition for cellulase production, disruption of gul1 resulted in smaller mycelial clumps and significantly lower viscosity of fermentation broth. In addition, cellulase production was improved by 22% relative to the parent strain. Transcriptome analysis revealed that a set of genes encoding cell wall remodeling enzymes as well as hydrophobins were differentially expressed in the Δgul1 strain. The results suggest that the regulatory role of gul1 in cell morphogenesis is likely conserved in filamentous fungi. To our knowledge, this is the first report on the engineering of gul1 in an industrially important fungus. © The Author(s) 2021. Published by Oxford University Press on behalf of Society of Industrial Microbiology and Biotechnology.

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