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中国生物工程杂志

China Biotechnology
China Biotechnology  2021, Vol. 41 Issue (1): 52-61    DOI: 10.13523/j.cb.2010028
    
Research Progress of Cellulase Production in Trichoderma reesei
XU Xiao1,CHENG Chi1,**(),YUAN Kai2,XUE Chuang1,2,**()
1 School of Bioengineering, Dalian University of Technology, Engineering Research Center of Application and Transformation for Synthetic Biology, Dalian 116024, China
2 Jiangsu Huaying Shunchang Biotechnology Co., Ltd, Xuzhou 221427, China
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Abstract  

Lignocellulosic biomass is considered an important and sustainable renewable energy source, which contains cellulose as the main component of lignocellulosic biomass. Cellulase is a group of enzymes that can decompose cellulose into glucose. Various microorganisms including fungi, bacteria, actinomycetes and yeasts are known to produce cellulase. Among them, Trichoderma reesei is one of the most widely used cellulolytic organisms that can produce a large amount of intact extracellular cellulase and hemicellulase to degrade lignocellulose. Therefore, T. reesei has become an important host microorganism for the production of commercial enzymes in the field of biotechnology. This article introduces the mechanism of cellulase, and summarizes the development status and the latest research progress of cellulase production by T. reesei. The influences of cellulase production technology including fermentation conditions and cellulase inducers, and the progress of different molecular strategies (such as mutagenesis and genetic modification) on constructing T. reesei with high cellulase-producing abilities were reviewed. In addition, the bottlenecks related to cellulase production are also discussed, in order to provide a more economical production process to widely apply cellulase in industrial production.



Key wordsTrichoderma reesei      Cellulase      Inducer      Genetic modification     
Received: 21 October 2020      Published: 09 February 2021
ZTFLH:  Q819  
Corresponding Authors: Chi CHENG,Chuang XUE     E-mail: cheng.chi@dlut.edu.cn;xue.1@dlut.edu.cn
Cite this article:

XU Xiao, CHENG Chi, YUAN Kai, XUE Chuang. Research Progress of Cellulase Production in Trichoderma reesei. China Biotechnology, 2021, 41(1): 52-61.

URL:

https://manu60.magtech.com.cn/biotech/10.13523/j.cb.2010028     OR     https://manu60.magtech.com.cn/biotech/Y2021/V41/I1/52

Fig.1 Functional mechanism of cellulase
Parental strain Gene manipulation Results Reference
T. reesei artificial transcription factor overexpression CMCase: 54.8 IU/(L·h)(increased by 12.8 times) [38]
T. reesei cre1 repression filter paper activity: 0.7 IU/mL(increased by 1.3 times)
endoglucanase activity: 3.7 IU/mL (increased by 1.8 times)
exoglucanase activity: 0.5 IU/mL(increased by 5.6 times)
[34]
T. reesei xyr1 overexpression CMCase: 68.7 IU/mL(increased by 134%) [40]
T. reesei cbh1 heterelogous expression filter paper activity: 1.7 IU/mL(increased by 2.2 times)
CMCase: 7.5 IU/mL(increased by 1.9 times)
β-glucosidase activity: 1.4 IU/mL(increased by 3.3 times)
[58]
T. reesei replacement of egl1 by ace1 CMCase: 10.7 IU/mL(increased by 90.0%) [59]
T. reesei β-Glucosidase gene heterelogous expression β-glucosidase activity: 34.3 IU/mL(increased by 6 to 8 times)
filter paper activity: 9.9 IU/mL (increased by 30%)
[62]
T. reesei serine kinase gene deletion endoglucanase activity: 9.1 IU/mL(increased by 25%~30%) [63]
Table 1 Successfully overexpressed/repressed genes in T. reesei
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