华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (5): 160-164.doi: 10.3969/j.issn.1000-565X.2011.05.028

• 生物工程 • 上一篇    

亲和超滤载体制备机理及应用胰蛋白酶的纯化

李存芝1 黄雪松1 唐书泽1 李琳2† 张广文1 胡长鹰1   

  1. 1.暨南大学 食品科学与工程系,广东 广州 510632;2.华南理工大学 轻工与食品学院,广东 广州 510640
  • 收稿日期:2011-01-29 修回日期:2011-03-11 出版日期:2011-05-25 发布日期:2011-04-01
  • 通信作者: 李琳(1963-),男,博士,教授,主要从事糖类物质及其药物的制备与生物利用研究.E-mail: felinl@scut.edu.cn E-mail:felinl@scut.edu.cn
  • 作者简介:李存芝(1969-),女,博士,讲师,主要从事食品化学、食品加工研究
  • 基金资助:

    国家自然科学基金资助项目(30871751);暨南大学博士科研启动基金资助项目(51205012)

Preparation and Application of Dextran-Ovomucoid Affinity Ultrafiltration Carrier

Li Cun-zhi1  Huang Xue-song1  Tang Shu-ze1  Li Lin2  Zhang Guang-wen1  Hu Chang-ying1   

  1. 1.Department of Food Science and Engineering,Jinan University,Guangzhou 510632,Guangdong,China;2.School of Light Industry and Food Sciences,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-01-29 Revised:2011-03-11 Online:2011-05-25 Published:2011-04-01
  • Contact: 李琳(1963-),男,博士,教授,主要从事糖类物质及其药物的制备与生物利用研究.E-mail: felinl@scut.edu.cn E-mail:felinl@scut.edu.cn
  • About author:李存芝(1969-),女,博士,讲师,主要从事食品化学、食品加工研究
  • Supported by:

    国家自然科学基金资助项目(30871751);暨南大学博士科研启动基金资助项目(51205012)

摘要:

为探讨葡聚糖-卵粘蛋白亲和超滤载体的制备机理及应用效果,首先用相对分子质量为200万的葡聚糖,经环氧氯丙烷活化,以卵粘蛋白为配基合成水溶性载体,然后用该载体对胰蛋白酶进行亲和超滤纯化并进行相关的紫外、红外光谱分析。结果表明:载体的活化历程为双分子亲核取代反应(SN2);合成的载体对胰蛋白酶的吸附符合Lang-muir吸附等温线方程,纯化倍数达45,活性回收率达80%;葡聚糖-卵粘蛋白载体对胰蛋白酶具有高度的亲和特异性,在亲和超滤过程中对胰蛋白酶具有很好的纯化效果。

关键词: 亲和超滤, 葡聚糖, 卵粘蛋白, 环氧氯丙烷, 胰蛋白酶

Abstract:

In order to reveal the preparation mechanism of dextran-ovomucoid affinity ultrafiltration carrier and evaluate the application effect of the carrier,first,dextran T2000 ( dextran with a relative molecular mass of 2 × 106 ) was employed to synthesize a water-soluble affinity carrier after the epichlorohydrin activation,with ovomucoid as the affinity ligand. Then,the changes of infrared adsorption spectrum and ultraviolet adsorption spectrum of the affinity carrier during the preparation were investigated,and pilot study on trypsin purified by the affinity ultrafiltration was performed. The results show that the activation of dextran can be described as a bimolecular nucleophilic substitution ( SN2) process,that the adsorption isotherm of trypsin by dextran-ovomucoid carrier can be described by the Langmuir isotherm equation,that the purification factor and the activity recovery rate respectively reach 45 times and 80%,and that the affinity of the carrier to trypsin is of high specificity,which may result in excellent purification effect of trypsin by affinity ultrafiltration.

Key words: affinity ultrafiltration, dextran, ovomucoid, epichlorohydrin, trypsin

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