华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (4): 95-99.

• 生物学 • 上一篇    下一篇

溶菌酶溶液的膜结晶工艺及影响因素

桂林 李琳 胡松青 陈玲 刘国琴   

  1. 华南理工大学 轻工与食品学院,广东 广州 510640
  • 收稿日期:2006-03-24 出版日期:2007-04-25 发布日期:2007-04-25
  • 通信作者: 桂林(1975-),男,博士生,主要从事生物化工方面的研究. E-mail:foodgui@163.com
  • 作者简介:桂林(1975-),男,博士生,主要从事生物化工方面的研究.
  • 基金资助:

    国家自然科学基金资助项目(20276021 )

Technique and Influence Factors of Membrane Crystallization in Lysozyme Solution

Gui Lin  Li Lin  Hu Song-qing  Chen Ling  Liu Guo-qin   

  1. School of Light IndustIγand Food Science , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-03-24 Online:2007-04-25 Published:2007-04-25
  • Contact: 桂林(1975-),男,博士生,主要从事生物化工方面的研究. E-mail:foodgui@163.com
  • About author:桂林(1975-),男,博士生,主要从事生物化工方面的研究.
  • Supported by:

    国家自然科学基金资助项目(20276021 )

摘要: 为研究溶菌酶溶液膜结晶的工艺过程和影响结晶效果的因素,采用超滤法从溶菌酶溶液中脱除溶剂,使溶液达到过饱和,在结晶助剂的作用下,制得了溶菌酶晶体.使用光学显微镜、扫描电镜和红外光谱对晶体进行了检测和分析.结果表明:采用截留分子质量为5ku 的疏水性聚醚砜超滤膜,以切向流方式进行超滤,当结晶助剂NaCl 含量为5% 、溶液流速为1000μrn/ s 时,晶体粒度最大,达0.2mm ,且晶体质量良好,符合X 射线衍射分析的要求.

关键词: 膜, 结晶, 蛋白质, 溶菌酶, 射线衍射

Abstract:

The aim of this paper is to investigate the technique and influence factors of membrane crystallization in lysozyme solution. In the investigation , the supersaturation of lysozyme solution was achieved by removing the sol-vent from the solution via ultrafïltration , and lysozyme crystals were formed in the presence of precipitant. Then ,optical microscopy , SEM and IR were adopted to determine and analyze the obtained crystals. The results show that
the largest crystal with a size of O. 20 mm can be obtained with a NaCl content of 5% and a solution flow rate of 1000μrn/ s in the tangential flow ultrafiltration based on hydrophobic PES ultrafiltration membrane with a molecular weight cut-off of 5 ku , and that the obtained crystals possess good structure suitable for X-ray diffraction analysis.

Key words: membrane, crystallization, protein, lysozyme, X-ray diffraction