Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (8): 1608-1616.DOI: 10.1016/S1872-2067(12)60628-7

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Synthesis of vitamin E succinate by interfacial activated Candida rugosa lipase encapsulated in sol-gel materials

Yi Hua,b, Xiangjun Jianga, Suwen Wua, Ling Jianga,b, He Huanga,b   

  1. a College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China;
    b State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China
  • Received:2013-04-22 Revised:2013-05-28 Online:2013-08-16 Published:2013-07-30
  • Supported by:

    This work was supported by the National Science Foundation for Distinguished Young Scholars of China (21225626), the National Natural Science Foundation of China (20906049), and the High Technology Research and Development Program of China (863 Program, 2011AA02A209).

Abstract: Vitamin E succinate was synthesized by interfacial activated Candida rugosa lipase (CRL) encapsulated in sol-gel materials. The effects of various immobilization parameters were investigated. The optimum conditions were found to consist of n-propyltrimethoxysilane/tetraethoxysilane molar ratio=1/1, water/silane molar ratio (R value)=20, lipase loading=0.5 mg/ml sol, and PEG400 loading=12 μl/ml sol. Compared with free enzymes, sol-gel encapsulated enzymes kept its activity of 70.58% and achieved 2.6-fold increased stability after 18 h incubation in phosphate buffer (0.025 mol/L, pH=7.0) at 50℃. Based on the interfacial characteristics of CRL, five kinds of surfactants were used for activation. The results demonstrate that olive oil was the most effective in activating CRL. The esterification activity of vitamin E succinate synthesis by interfacial activated CRL encapsulated in sol-gel materials reached up to 6.7-fold and 1.43-fold that of free enzyme and non-interfacial activated enzyme, respectively.

Key words: Sol-gel, Interfacial activation, Candida rugosa lipase, Vitamin E succinate