Abstract
A xylanase gene, xynE2, was cloned from thermoalkaline Anoxybacillus sp. E2 and was expressed in Escherichia coli BL21 (DE3). The gene consisted of 987 bp and encoded a 328-residue xylanase with a calculated molecular weight of 38.8 kDa. On the basis of amino acid sequence similarities, this enzyme was assigned as a member of glycoside hydrolase family 10. Purified recombinant XynE2 showed maximal activity at pH 7.8 and 65°C, and was thermostable at 60°C. The enzyme was highly active and stable over a broad pH range, showing more than 90% of maximal activity at pH 6.6–pH 8.6 and retaining more than 80% of activity at pH 4.6–pH 12.0, 37°C for 1 h, respectively. These favorable properties make XynE2 a good candidate in the pulp and paper industries. This is the first report on gene cloning, expression and characterization of a xylanase from the genus Anoxybacillus.
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Acknowledgment
This work was supported by the National High Technology Research and Development Program of China (863 Program; grant no. 2007AA100601) and the National Key Technology Program of China (grant no. 2006BAD12B05-03).
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Wang, J., Bai, Y., Yang, P. et al. A new xylanase from thermoalkaline Anoxybacillus sp. E2 with high activity and stability over a broad pH range. World J Microbiol Biotechnol 26, 917–924 (2010). https://doi.org/10.1007/s11274-009-0254-5
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DOI: https://doi.org/10.1007/s11274-009-0254-5