食品科学 ›› 2009, Vol. 30 ›› Issue (23 ): 262-265.doi: 10.7506/spkx1002-6300-200923059

• 生物工程 • 上一篇    下一篇

单增李斯特菌鞭毛蛋白提取方法的研究

陈 钢,赖卫华*,段 霞   

  1. 南昌大学 食品科学与技术国家重点实验室
  • 收稿日期:2009-07-03 出版日期:2009-12-01 发布日期:2010-12-29
  • 通讯作者: 赖卫华 E-mail:talktolaiwh@163.com

Extraction of Flagellin from Listeria monocytogenes

CHEN Gang,LAI Wei-hua*,DUAN Xia   

  1. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Received:2009-07-03 Online:2009-12-01 Published:2010-12-29
  • Contact: LAI Wei-hua E-mail:talktolaiwh@163.com

摘要:

本实验对单增李斯特菌鞭毛蛋白提取方法进行研究,分别在23℃和37℃的条件下对单增李斯特菌(血清型IVb)进行扩增培养,发现23℃下单增李斯特菌产鞭毛的能力更强。运用酸解法处理单增李斯特菌后,分别通过超速离心法和硫酸铵沉淀法对鞭毛蛋白进行纯化,SDS-PAGE 电泳以及电镜的实验结果表明,超速离心较硫酸铵沉淀法简便、耗时短、纯度高、产量高,适用于单增李斯特菌鞭毛蛋白的提取。

关键词: 单增李斯特菌, 酸解法, 鞭毛, 超速离心

Abstract:

In this study, the extraction of flagellin from Listeria monocytogenes was studied. Listeria monocytogenes IVb was cultured at 23 ℃ and 37 ℃, respectively. Stronger flagellin-producing capability was observed at 23 ℃ of culture condition. Flagellin was purified through ultra-centrifugation and ammonia sulfate precipitation after acid hydrolysis treatment of Listeria monocytogenes. Results from SDS-PAGE and electronic microscope revealed that ultra-centrifugation combined ammonia sulfate precipitation was an applicable method for flagellin extraction because this simple and time-saving method could provide flagellin with high purity and high yield.

Key words: Listeria monocytogenes, acid hydrolysis, flagellin, ultra-centrifugation

中图分类号: