生物技术通报 ›› 2015, Vol. 31 ›› Issue (7): 226-230.doi: 10.13560/j.cnki.biotech.bull.1985.2015.07.035

• 研究报告 • 上一篇    

肺炎链球菌SPD1587蛋白的表达纯化及晶体生长研究

黄健1, 黄美容2, 骆诗露1, 朱杰华1, 闵迅1   

  1. (1.遵义医学院附属医院医学检验科,遵义 563003;2.遵义医学院附属医院输血科,遵义 563003)
  • 收稿日期:2015-03-26 出版日期:2015-07-16 发布日期:2015-07-16
  • 作者简介:黄健,男,硕士,研究方向:细菌致病分子机制研究;E-mail:81537648@qq.com
  • 基金资助:
    国家自然科学基金项目(81460317),贵州省社会发展公关计划(2012GZ83293)

Expression, Purification, Crystallization of SPD1587 Protein from Streptococcus pneumoniae

Huang Jian1, Huang Meirong2, Luo Shilu1, Zhu Jiehua1, Min Xun1   

  1. (1. Department of Laboratory Medicine,Affiliated Hospital of Zunyi Medical College,Zunyi 563003;2. Department of Blood Transfusion,Affiliated Hospital of Zunyi Medical College,Zunyi 563003)
  • Received:2015-03-26 Published:2015-07-16 Online:2015-07-16

摘要: SPD1587蛋白是肺炎链球菌D39菌株中的一种转录因子,其在鼻咽部定植和肺部感染过程中发挥着重要作用。生物信息学分析提示其具有与A群链球菌的转录因子Mga蛋白相似的结构,目前其三维结构尚未被解析。成功构建了SPD1587蛋白的全长表达载体PET28a-spd1587,利用大肠杆菌BL21(DE3)菌株进行原核表达,获得了以可溶形式表达的目的蛋白。经Ni-NTA柱亲和层析及DEAE阴离子交换层析纯化后,获得了高纯度的目的蛋白。采用悬滴气相扩散法获得了SPD1587蛋白晶体。

关键词: 肺炎链球菌, SPD1587蛋白, 原核表达, 晶体生长

Abstract: SPD1587 protein is a transcription factor of streptococcus pneumoniae D39 strains, which plays an important role in nasopharyngeal colonization and lung infection. It has a conserved domain that was similar to transcription factors Mga of group A streptococcus, but the protein three-dimensional structure is unclear. In this study, the protein expression vector of PET28a-spd1587 was successfully constructed and a soluble form of SPD1587 protein was acquired in Escherichia coli BL21(DE3)strain. High purity SPD1587 protein was obtained by Ni-NTA affinity chromatography and DEAE negative ion exchange chromatography. The crystal of SPD1587 protein was obtained by the vapor diffusion method.

Key words: Streptococcus pneumoniae, SPD1587 protein, prokaryotic expression, crystal grow