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Biochemical characterization of xylanase GH11 isolated from Aspergillus niger BCC14405 (XylB) and its application in xylooligosaccharide production

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Abstract

Objective

To develop an endo-β-1,4-xylanase with high specificity for production of prebiotic xylooligosaccharides that optimally works at moderate temperature desirable to reduce the energy cost in the production process.

Results

The xylB gene, encoding for a glycosyl hydrolase family 11 xylanase from a thermoresistant fungus, Aspergillus niger BCC14405 was expressed in a methylotrophic yeast P. pastoris KM71 in a secreted form. The recombinant XylB showed a high specific activity of 3852 and 169 U mg−1 protein on beechwood xylan and arabinoxylan, respectively with no detectable side activities against different forms of cellulose (Avicel Ò PH101 microcrystalline cellulose, phosphoric acid swollen cellulose and carboxymethylcellulose). The enzyme worked optimally at 45 °C, pH 6.0. It showed a specific cleavage pattern by releasing xylobiose (X2) as the major product from xylooligosaccharides (X3 to X6) substrates. The highest XOS yield of 708 mg g−1 substrate comprising X2, X3 and X6 was obtained from beechwood xylan hydrolysis.

Conclusion

The enzyme is potent for XOS production and for saccharification of lignocellulosic biomass.

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Acknowledgements

This work was financially supported by National Science and Technology Development Agency [Grant No. P18-52705]. The authors would like to thank Dr. Nattapol Arunrattanamook for manuscript proofreading and comments.

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Authors and Affiliations

Authors

Contributions

KA: Methodology, Investigation, Writing—original draft. BB: Conceptualization, Methodology, Investigation, Writing—original draft, Writing—review and editing. HL: Methodology, Investigation, Writing—review and editing. WS: Writing—original draft, Writing—review and editing. PK: Writing—original draft, Writing—review and editing. VC: Conceptualization, Investigation, Writing—review and editing, Supervision, Funding acquisition.

Corresponding author

Correspondence to Benjarat Bunterngsook.

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The authors declare that they have no conflicts of interest with the contents of this article.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Aiewviriyasakul, K., Bunterngsook, B., Lekakarn, H. et al. Biochemical characterization of xylanase GH11 isolated from Aspergillus niger BCC14405 (XylB) and its application in xylooligosaccharide production. Biotechnol Lett 43, 2299–2310 (2021). https://doi.org/10.1007/s10529-021-03202-1

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  • DOI: https://doi.org/10.1007/s10529-021-03202-1

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