Applied Biochemistry and Biotechnology

, Volume 179, Issue 1, pp 126–142 | Cite as

Biochemical and Thermodynamic Characterization of a Novel, Low Molecular Weight Xylanase from Bacillus Methylotrophicus CSB40 Isolated from Traditional Korean Food

  • Sandesh Panthi
  • Yoon Seok Choi
  • Yun Hee Choi
  • MiRi Kim
  • Jin Cheol YooEmail author


A low molecular weight xylanase from Bacillus strain CSB40, isolated from traditional Korean food and produced in beechwood xylan, was biochemically and thermodynamically characterized. It was purified 8.12-fold with a 15.88 % yield using DEAE sepharose fast flow, and it was determined to have a mass of ∼27 kDa via sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and xylan zymography. The purified xylanase was optimally active at 50 °C and pH 6 and stable over a wide range of pH (4.5–12.5). The N-terminal amino acid sequence of xylanase was GIQQGDDGKL. The activation energy for beechwood xylan hydrolysis was 29.39 kJmol−1 with k cat value of 927.582 × 102 s−1. K m and V max were 0.080 mg/ml and 794.63 mmol min−1 mg−1. The analysis of other thermodynamic parameters like ∆H, ∆G, ∆S, Q10, ∆GE-S, and ∆GE-T also supported the spontaneous formation of products, greater hydrolytic efficiency, and feasibility of enzymatic reaction, which also ratifies the novelty of this xylanase. The enzyme was strongly activated by Zn2+ and inhibited by Cu2+. The principal hydrolyzed end-products of this xylanase are xylobiose, xylotriose, and xylotetrose, which can be used in the pharmaceutical industry and as prebiotic in food.


Bacillus methylotrophicus Low molecular weight xylanase Thermodynamic characterization Xylooligosaccharides 



This work was supported by research fund from Chosun University, 2015.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Sandesh Panthi
    • 1
  • Yoon Seok Choi
    • 1
  • Yun Hee Choi
    • 1
  • MiRi Kim
    • 1
  • Jin Cheol Yoo
    • 1
    Email author
  1. 1.Department of PharmacyChosun UniversityGwangjuKorea

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