食品科学 ›› 2009, Vol. 30 ›› Issue (23 ): 290-293.doi: 10.7506/spkx1002-6300-200923065

• 生物工程 • 上一篇    下一篇

转谷氨酰胺酶在尼龙网上的固定化及其酶学性质的研究

刘 颖,张 鹤,石彦国,马永强,张 丹   

  1. 哈尔滨商业大学食品工程学院
  • 收稿日期:2009-08-11 出版日期:2009-12-01 发布日期:2010-12-29
  • 通讯作者: 刘 颖 E-mail:37807071@sohu.com
  • 基金资助:

    国家“863”计划项目(2006AA10Z329)

Immobilization and Enzymatic Properties of Transgluminase on Nylon Net

LIU Ying,ZHANG He,SHI Yan-guo,MA Yong-qiang,ZHANG Dan   

  1. College of Food Engineering, Harbin Commercial University, Harbin 150076, China
  • Received:2009-08-11 Online:2009-12-01 Published:2010-12-29
  • Contact: LIU Ying E-mail:37807071@sohu.com

摘要:

以硫酸二甲酯活化后的尼龙网为载体,戊二醛为交联剂固定转谷氨酰胺酶,并对固定化条件及固定化酶的酶学性质进行研究。结果表明固定化的最适条件为:1cm2 处理后的尼龙网与20ml 7% 的戊二醛交联5h 后,在4℃条件下固定10ml 1.5mg/ml 的转谷氨酰胺酶溶液6h,此条件下酶活回收率达到46%。固定化转谷氨酰胺酶相对于游离酶具有更好的热稳定性,并具有良好的储存性及操作稳定性。

关键词: 转谷氨酰胺酶, 固定化, 尼龙网

Abstract:

Transgluminase was immobilized on nylon net using activated dimethylsulfate as the carrier and glutaraldehyde as the cross-linking agent. Immobilization conditions and enzymatic properties of immobilized enzyme were also investigated. The optimal condition for immobilization was initial crosslinkage reaction of nylon net with 7% glutaraldehyde for 5 hours and final immobilization reaction using 10 ml of 1.5 mg/ml transgluminase on activated carrier for 6 hours. Activity of immobilized transgluminase was 46% under this optimal immobilization condition. Compared to free transgluminase, immobilized transgluminase exhibited better thermo-stability during storage and experimental operations.

Key words: transglutaminase, immobilization, nylon net

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