Abstract
A recombinant xylanase gene (rxynUMB) from Ustilago maydis 521 was expressed in Pichia pastoris, and the enzyme was purified and characterized. Phylogenetic analysis demonstrated that rxynUMB belongs to glycosyl hydrolase family 11. The Trp84, Trp95, Glu93, and Glu189 residues are proposed to be present at the active site. The apparent molecular mass of the recombinant xylananse was approximately 24 kDa, and the optimum pH and temperature were 4.3 and 50 °C, respectively. Xylanase activity was enhanced by 166 and 115 % with Fe2+ and Mn2+, respectively. The biochemical properties of this recombinant xylanase suggest that it may be a useful candidate for a variety of commercial applications.
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Acknowledgments
The research was supported by the International Scientific and Technological Cooperation (13440701700), Agriculture Science Technology Achievement Transformation Fund (133919N1300), Key Project Fund of Shanghai Minhang Science and Technology Committee (2012MH059), Young Foundation of Shanghai Academy of Agricultural Science (2010–2014). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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Supplementary Fig. 1 The optimal sequence derived for the wild-type xylanase gene, xynUMB, from Ustilago maydis 521.
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Han, H., You, S., Zhu, B. et al. Characterization and high expression of recombinant Ustilago maydis xylanase in Pichia pastoris . Biotechnol Lett 37, 697–703 (2015). https://doi.org/10.1007/s10529-014-1716-x
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DOI: https://doi.org/10.1007/s10529-014-1716-x