Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (7): 226-230.doi: 10.13560/j.cnki.biotech.bull.1985.2015.07.035

• Research report • Previous Articles    

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 Online:2015-07-16 Published:2015-07-16

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