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Molecular Cloning and Overexpression of an Endo-β-1,4-xylanase Gene from Aspergillus niger in Industrial Saccharomyces cerevisiae YS2 Strain

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Abstract

The aim of this study was to endow an industrial strain of Saccharomyces cerevisiae with the ability to overexpress the xylanase by constructing a homology-driven integration vector. The total mRNA from a xylanase-producing strain of Aspergillus niger IME-216 was extracted and used as the template for the production of endo-β-1,4-xylanase cDNA by reverse transcription. The fusion fragment containing the phosphoglycerate kinase promoter, α-factor signal peptide, xylanase gene encoding the mature peptide, and CYC1 terminator was first generated by overlap extension polymerase chain reaction. Then, the vector pUPX was constructed by inserting the fusion fragment into the S. cerevisiae plasmid pUG6. Then, A 2.2-kb rDNA sequence was further cloned and attached to the SalI-digested pUPX to obtain the integration plasmid pUPXR. The pUPXR was linearized by KpnI, transformed into the industrial strain S. cerevisiae YS2 using the lithium acetate method and integrated into the S. cerevisiae chromosome. The maximum yield of the recombinant xylanase produced by the engineered S. cerevisiae strain YS2_2 was 74.8 U per microliter, which was about 1.5-fold higher than the original 50 U per microliter by Aspergillus niger IME-216 strain under the flask culture at 28 °C for 72 h. The findings of our study can be used for further development of industrial S. cerevisiae strain for producing interested enzymes, or improving the achievement of metabolism, for example, simultaneous fermentation of glucose and xylose to producing bioethanol.

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Acknowledgments

This work was supported by grants from the National Natural Science Foundation of China (nos. 31170108 and 30800735) and the earmarked fund for Modern Agro-industry Technology Research System (CARS-20-4-4).

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Authors and Affiliations

  1. Engineering Research Center of Industrial Microbiology of Ministry of Education, and College of Life Sciences, Fujian Normal University, Fuzhou, 350108, People’s Republic of China

    Baoyu Tian, Yan Xu, Wanling Cai, Qingeng Huang, Yuanyuan Gao, Xin Li & Jianzhong Huang

  2. Key Laboratory of Molecular Biophysics of the Ministry of Education, Department of Genetics and Developmental Biology, College of Life Science and Technology, Center for Human Genome Research, Cardio-X Institute, Huazhong University of Science and Technology, Wuhan, People’s Republic of China

    Yan Xu

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  1. Baoyu Tian
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  2. Yan Xu
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  3. Wanling Cai
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  4. Qingeng Huang
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  5. Yuanyuan Gao
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  6. Xin Li
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  7. Jianzhong Huang
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Correspondence to Baoyu Tian.

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B.Y. Tian and Y. Xu contributed equally to this work.

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Tian, B., Xu, Y., Cai, W. et al. Molecular Cloning and Overexpression of an Endo-β-1,4-xylanase Gene from Aspergillus niger in Industrial Saccharomyces cerevisiae YS2 Strain. Appl Biochem Biotechnol 170, 320–328 (2013). https://doi.org/10.1007/s12010-013-0173-7

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  • DOI: https://doi.org/10.1007/s12010-013-0173-7

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