Journal article
Protein disulfide isomerase homolog TrPDI2 contributing to cellobiohydrolase production in Trichoderma reesei
Enzyme and microbial technology, Vol.77, pp.21-28
09/2015
Handle:
https://hdl.handle.net/2376/117099
PMID: 26138396
Abstract
•Functional protein disulfide isomerase TrPDI2 was identified in Trichoderma reesei.•TrPDI2 participated in cellulase maturation and activity maintenance.•Increase in Trpdi2 expression level enhanced cellobiohydrolase production.•The redox state of TrPDI2 responded to cellulase induction.
The majority of the cysteine residues in the secreted proteins form disulfide bonds via protein disulfide isomerase (PDI)-mediated catalysis, stabilizing the enzyme activity. The role of PDI in cellulase production is speculative, as well as the possibility of PDI as a target for improving enzyme production efficiency of Trichoderma reesei, a widely used producer of enzyme for the production of lignocellulose-based biofuels and biochemicals. Here, we report that a PDI homolog, TrPDI2 in T. reesei exhibited a 36.94% and an 11.81% similarity to Aspergillus niger TIGA and T. reesei PDI1, respectively. The capability of TrPDI2 to recover the activity of reduced and denatured RNase by promoting refolding verified its protein disulfide isomerase activity. The overexpression of Trpdi2 increased the secretion and the activity of CBH1 at the early stage of cellulase induction. In addition, both the expression level and redox state of TrPDI2 responded to cellulase induction in T. reesei, providing sustainable oxidative power to ensure cellobiohydrolase maturation and production. The results suggest that TrPDI2 may contribute to cellobiohydrolase secretion by enhancing the capability of disulfide bond formation, which is essential for protein folding and maturation.
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Details
- Title
- Protein disulfide isomerase homolog TrPDI2 contributing to cellobiohydrolase production in Trichoderma reesei
- Creators
- Guokun Wang - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR ChinaPin Lv - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR ChinaRonglin He - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR ChinaHaijun Wang - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR ChinaLixian Wang - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR ChinaDongyuan Zhang - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR ChinaShulin Chen - Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, PR China
- Publication Details
- Enzyme and microbial technology, Vol.77, pp.21-28
- Publisher
- Elsevier Inc
- Identifiers
- 99900583062101842
- Language
- English
- Resource Type
- Journal article