生物技术通报 ›› 2013, Vol. 0 ›› Issue (4): 210-214.

• 研究报告 • 上一篇    下一篇

融合蛋白LL-37-haFGF 的复性及纯化条件研究

沈娟1,2, 金小宝2, 丁静2, 朱家勇2   

  1. 1. 广东药学院生命科学与生物制药学院,广州 510006 ;2. 广东药学院 广东省生物活性药物研究重点实验室,广州 510006
  • 收稿日期:2012-10-28 修回日期:2013-04-22 出版日期:2013-04-22 发布日期:2013-04-22
  • 作者简介:沈娟,女,博士,讲师,研究方向:药用生物活性物质结构功能与应用;E-mail :shenjuan0412@126.com
  • 基金资助:
    广州市科技支撑计划项目(2010J-E411 ), 广东省教育厅育苗计划( LYM11082)

Study of the Renaturation and Purification of LL-37-haFGF Fusion Protein

Shen Juan1,2, Jin Xiaobao2, Ding Jing2, Zhu Jiayong2   

  1. 1. School of Life Science & Biopharmacology,Guangdong Pharmaceutical University,Guangzhou 510006 ;2. Guangdong Key Laboratory of Pharmaceutical Bioactive Substances,Guangzhou 510006
  • Received:2012-10-28 Revised:2013-04-22 Published:2013-04-22 Online:2013-04-22

摘要: 首次设计开发一种促愈合,抗细菌感染的多肽分子——人源抗菌肽LL-37 修饰haFGF 的融合蛋白,旨在探讨此新 型融合蛋白LL-37-haFGF 的复性及纯化条件。利用重组大肠杆菌表达LL-37-haFGF 并鉴定,初步考察8 种复性添加小分子对其包 涵体复性的作用,经分析表明,添加0.3 mol/L 精氨酸可以大大提高LL-37-haFGF 的复性效率。经镍亲和色谱及CM 阳离子色谱纯 化获得纯品。本研究获得了5.9 mg 纯度为95.43% 的LL-37-haFGF 目的蛋白,为研究其功能奠定了基础,也为类似的双功能多肽的 制备提供了参考依据。

关键词: LL-37, haFGF, 重组融合蛋白, 复性, 纯化

Abstract: A new multifunctional healing peptide was designed and developed for the first time, human antimicrobial peptide LL-37 modified haFGF fusion proteins, which can promote healing and fight infection. This paper discussed renaturation conditions and purification conditions of the new fusion protein named recombinant LL-37-haFGF was expressed by Escherichia coli and identified of effects on the refolding of eight kinds of small molecules added to inclusion bodies were preliminary investigated. The result showed supplementation of 0.3 mol/L arginine can greatly improve renaturation efficiency of LL-37-haFGF. The pure product of was obtained with nickel affinity chromatography and CM cation chromatography. Through this study, we obtained 5.9 mg target protein of high purity 95.43%, laying the function for its functional study, and also providing the reference for the preparation of similar multifunctional polypeptide.

Key words: LL-37, haFGF, Fusion protein, Renaturation, Purification