食品科学 ›› 2010, Vol. 31 ›› Issue (3): 173-176.doi: 10.7506/spkx1002-6300-201003039

• 生物工程 • 上一篇    下一篇

两种功能化磁性载体固定重组几丁质酶的研究

封 丽1,2,阎瑞香2,冯春雨2,林 燕1,2,李喜宏1,*   

  1. 1.天津科技大学食品工程与生物技术学院 2.国家农产品保鲜工程技术研究中心,天津市农产品采后生理与贮藏保鲜重点实验室
  • 收稿日期:2009-03-20 修回日期:2009-09-15 出版日期:2010-02-01 发布日期:2010-12-29
  • 通讯作者: 李喜宏 E-mail:fengduhappy@yahoo.com.cn
  • 基金资助:

    “十一五”国家科技支撑计划项目(2006BAD22B02)

Immobilization of Recombinant Chitinase with Two Functional Magnetic Carriers

FENG Li1,2 YAN Rui-xiang2 FENG Chun-yu2 LIN Yan1,2 LI Xi-hong1,*   

  1. 1. College of Food Engineering and Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
    2. National Engineering Technology Research Center for Preservation of Agricultural Products, Tianjin Key Laboratory of Postharvest
    Physiology and Storage of Agricultural Products, Tianjin 300384, China
  • Received:2009-03-20 Revised:2009-09-15 Online:2010-02-01 Published:2010-12-29
  • Contact: LI Xi-hong E-mail:fengduhappy@yahoo.com.cn

摘要:

以四氧化三铁磁性微球为核,表面分别接枝氨丙基三乙氧基硅烷(APTES)、甲基丙烯酸缩水甘油酯(GMA),制备两种功能化磁性载体,对粗酶液中的重组几丁质酶进行固定化研究。结果表明:PGMA-Fe3O4单位蛋白载量、纯化倍数均高于APTES-Fe3O4,分别为1689.7436mg/g、6.8013;4℃环境中贮藏10d,PGMA-Fe3O4固定的重组几丁质酶相对酶活力为69.66%;重复利用7次后,相对酶活力在44%以上。

关键词: 重组几丁质酶, 功能化磁性载体, 固定化

Abstract:

Two kinds of functional magnetic carriers (A-type and P-type) were prepared and used for the immobilization of recombinant chitinase. A-type carrier was prepared by 3-aminopropyltriethoxysilane (APTES) and Fe3O4 magnetic microsphere. P-type carrier was prepared by co-polymerization of glycidyl methacrylate (GMA) on the surface of Fe3O4 magnetic microsphere in the presence of polyethylene glycol. Results indicated that P-type carrier had higher protein loading capacity and purification fold compared with A-type carrier, which were 1689.74 mg/g and 6.8013, respectively. The activity of immobilized recombinant chitinase onto P-type carrier could maintain 69.66% at 4 ℃ for 10 days. The activity of immobilized recombinant chitinase onto P-type carrier remained more than 44 % of original activity after being repeatedly used 7 times.

Key words: chitinase, functional magnetic carrier, immobilization

中图分类号: