生物技术通报 ›› 2016, Vol. 32 ›› Issue (7): 59-65.doi: 10.13560/j.cnki.biotech.bull.1985.2016.07.009

• 技术与方法 • 上一篇    下一篇

跨膜蛋白AgrCTM6-7C分离纯化方法的优化

王路路1, 2, 权春善2, 许永斌2, 王冠天2, 刘爽2, 陈莹2   

  1. 1. 大连工业大学,大连 116000;
    2. 大连民族大学生命科学学院 大连民族大学生物技术与资源利用国家民委-教育部重点实验室,大连 116605
  • 收稿日期:2015-10-30 出版日期:2016-07-25 发布日期:2016-07-25
  • 作者简介:王路路,女,硕士研究生,研究方向:细菌双组份信号转导系统;E-mail:wanglulu0813@126.com
  • 基金资助:
    国家自然科学基金项目(21272031),中央高校基本科研基金(DC201502020201)

Optimization of the Purification Method for Transmembrane Protein AgrCTM6-7C

WANG Lu-lu1, 2, QUAN Chun-shan2, XU Yong-bin2, WANG Guan-tian2, LIU Shuang2, CHEN Ying2   

  1. 1. School of Biological Engineering,Dalian Polytechnic University,Dalian 116000;
    2. Key Laboratory of Biotechnology and Resource Utilization,State Ethnic Affairs Commission and Ministry of Education,Department of Life Science,Dalian Nationalities University,Dalian 116605
  • Received:2015-10-30 Published:2016-07-25 Online:2016-07-25

摘要: 旨在通过优化AgrCTM6-7C蛋白的纯化过程,获得高纯度的目的蛋白,为后续研究提供材料。详细探讨了金属离子螯合层析缓冲液中咪唑浓度、离子交换层析缓冲液的pH值对AgrCTM6-7C蛋白纯化效果的影响,并研究了β-巯基乙醇对AgrCTM6-7C蛋白聚集及其激酶活性的影响。经过优化后,在不影响AgrCTM6-7C蛋白激酶活性的前提下,AgrCTM6-7C蛋白在浓度和纯度上均有明显提高,纯度可达98%以上,产量可达15 mg/L。

关键词: 金黄色葡萄球菌, AgrCTM6-7C, 纯化

Abstract: The core objective of this paper is to obtain the protein of AgrCTM6-7C with high purity by optimizing the purification processes,and provide the materials for further research. We investigated the influence of imidazole concentration in buffer used in the metal ion affinity chromatography and buffer with different pH used in the ion exchange chromatography on the purification of AgrCTM6-7C. Moreover,we discussed the effects of β-Mercaptoethanol on protein aggregation and kinase activity of AgrCTM6-7C. The optimized purification method resulted in the obvious increase on the yield and purity of AgrCTM6-7C,producing 15 mg with about 98% purity from one-liter culture medium.

Key words: Staphylococcus aureus, AgrCTM6-7C, purification