生物技术通报 ›› 2015, Vol. 31 ›› Issue (2): 167-172.doi: 10.13560/j.cnki.biotech.bull.1985.2015.02.025

• 研究报告 • 上一篇    下一篇

葡萄糖淀粉酶在高压静电纺PEI/PVA纳米纤维膜上的离子吸附固定

隋春红1, 王程2, 董顺福1, 韩丽琴1   

  1. 1.吉林医药学院药学院,吉林 132013;
    2.吉林医药学院基础医学院,吉林 132013
  • 收稿日期:2014-07-07 出版日期:2015-02-05 发布日期:2015-02-06
  • 作者简介:隋春红,女,博士,副教授,研究方向:纳米材料;E-mail:suichunhong@163.com
  • 基金资助:
    吉林省教育厅资助项目(吉教科合字[2013]第354号)

Immobilization of Glucoamylase onto the Electrospinning PEI/PVA Composite Nanofiber Membrane via Ionic Adsorption

Sui Chunhong1, Wang Cheng2, Dong Shunfu1, Han Liqin1   

  1. 1. Department of Pharmacy, Jilin Medical College, Jilin 132013; 2. Department of Basic Medical Sciences, Jilin Medical College, Jilin 132013
  • Received:2014-07-07 Published:2015-02-05 Online:2015-02-06

摘要: 旨在应用离子结合法将葡萄糖淀粉酶固定在PEI/PVA纳米纤维膜上并对其理化性质进行研究。采用高压静电纺丝技术制备聚乙烯亚胺(PEI)/聚乙烯醇(PVA)纳米纤维膜,采用热交联方法使其具备水稳定性后,再利用离子吸附法固定葡萄糖淀粉酶。结果显示,利用红外光谱(FT-IR)表征固定有葡萄糖淀粉酶的PEI/PVA纳米纤维膜,表明葡萄糖淀粉酶可成功固定在静电纺丝形成的PEI/PVA纳米纤维膜表面。通过固定化葡萄糖淀粉酶的酶学性质鉴定,发现固定化葡萄糖淀粉酶的最适反应温度为65℃,比游离的葡萄糖淀粉酶提高了6℃;固定化葡萄糖淀粉酶的适用pH值范围明显变宽;热稳定性和存贮稳定性显著增强且可以重复使用。利用离子吸附法能简便地将蛋白质分子固定于纳米纤维膜上,具有一定的应用前景。

关键词: 静电纺丝, PEI/PVA纳米纤维膜, 葡萄糖淀粉酶, 离子吸附, 固定化

Abstract: It was to study the physical and chemical properties of immobilization of glucoamylase on the PEI/PVA nanofibers via ion bonding. Polyethyleneimine(PEI)/polyvinyl alcohol(PVA) composite nanofiber membrane was prepared by electrospinning technology, and thermal crosslinking was applied to make it possess water stability. Glucoamylase was immobilized onto the electrospinning PEI/PVA composite nanofiber membrane via ion adsorption. Results showed that fourier transform infrared spectrum(FT-IR) indicated that glucoamylase can be successfully fixed on the surface of the electrospinning PEI/PVA composite nanofiber membrane. Then, the enzymatic properties of immobilized glucoamylase were identified. The results have shown that the optimum reaction temperature of immobilized glucoamylase is 65℃, 6 degrees higher than free glucoamylase, and the applicable pH range of immobilized glucoamylase is wider than free glucoamylase significantly. In addition, immobilized glucoamylase also has good thermal stability, storage stability and reusability. The use of ion adsorption can help the protein molecules easily fixed onto the nanofiber membrane, so this method processes a certain application.

Key words: electrospinning, PEI/PVA composite nanofiber membrane, glucoamylase, ionic adsorption, immobilization