食品科学 ›› 2009, Vol. 30 ›› Issue (1): 169-172.doi: 10.7506/spkx1002-6630-200901040

• 生物工程 • 上一篇    下一篇

氨基化硅胶作载体固定化α-淀粉酶的研究

刘海燕1 ,2,李 宁1 ,3,李敬慈1,吴秋华1,段慧云2,杨秀敏1   

  1. 1.河北农业大学理学院 2.河北大学化学与环境科学学院 3.河北农业大学食品科技学院
  • 收稿日期:2007-12-07 修回日期:2008-05-20 出版日期:2009-01-01 发布日期:2010-12-29
  • 通讯作者: 刘海燕 E-mail:LHYBD@126.COM
  • 基金资助:

    河北省科技攻关课题(3276414);河北大学青年基金项目(2006Q4);河北农业大学非生命学科科研发展基金项目

Study on Immobilization ofα-Amylase with 3-Aminopropyl Silica Gel as Carrier

LIU Hai-yan1,2,LI Ning1,3,LI Jing-ci1,WU Qiu-hua1,DUAN Hui-yun2,YANG Xiu-min1   

  1. (1.College of Science, Agricultural University of Hebei, Baoding 071001, China;
    2.College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China;
    3.College of Food Science and Technology, Agricultural University of Hebei, Baoding 071001, China)
  • Received:2007-12-07 Revised:2008-05-20 Online:2009-01-01 Published:2010-12-29
  • Contact: LIU Hai-yan1 E-mail:LHYBD@126.COM

摘要:

采用5 种硅胶作为载体,戊二醛作偶联剂,制备了固定化α- 淀粉酶。对制备固定化α- 淀粉酶的硅胶目数、偶联剂浓度、温度、pH 值的影响因素进行了研究和优化。并对固定化酶和游离酶的酶学性质进行了比较。结果表明:固定化酶的最适温度为75℃,比游离酶提高了10℃,固定化酶的热稳定性优于游离酶。与游离酶相比,其对酸碱的适应性、贮存稳定性、操作稳定性也都有较明显改善。固定化酶的Km 值略低于游离酶,前者为2.13mg/ml,后者为1.02mg/ml。

关键词: α-淀粉酶, 固定化酶, 3-氨丙基硅胶

Abstract:

α-Amylase was immobilized on five 3-aminopropyl silica gels with glutaraldehyde as crosslinking agent. Some factors that affect the activity of immobilized α-amylase were investigated, such as the mesh of silica gel, concentration of glutaraldehyde, reaction temperature and pH. The properties of imm obilized and free α-amylases were also compared. The results indicated that the optimum temperature of the immobilized enzyme is 75℃, which is 10℃ higher than that of the free α-amylase, and its thermal stability is better than that of free enzyme. Compared with free α-amylase, the immobilized α-amylase is also markedly improved in acid and alkaline stability, storage stability and operation stability. Furthermore, the Michealis constant (Km) of immobilized α-amylase is 2.13 mg/ml, while that of free α-amylase is 1.02 mg/ml.

Key words: α-amylase, immobilized enzyme, 3-aminopropyl silica gel

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