Crystal structure of the in vivo-assembled Bacillus subtilis Spx/RNA polymerase α subunit C-terminal domain complex Academic Article uri icon


MeSH Major

  • Bacillus subtilis
  • Crystallography, X-Ray
  • DNA-Directed RNA Polymerases


  • The Bacillus subtilis Spx protein is a global transcription factor that interacts with the C-terminal domain of the RNA polymerase alpha subunit (alphaCTD) and regulates transcription of genes involved in thiol-oxidative stress, sporulation, competence, and organosulfur metabolism. Here we determined the X-ray crystal structure of the Spx/alphaCTD complex from an entirely new crystal form than previously reported [Newberry, K.J., Nakano, S., Zuber, P., Brennan, R.G., 2005. Crystal structure of the Bacillus subtilis anti-alpha, global transcriptional regulator, Spx, in complex with the alpha C-terminal domain of RNA polymerase. Proc. Natl. Acad. Sci. USA 102, 15839-15844]. Comparison of the previously reported sulfate-bound complex and our sulfate-free complex reveals subtle conformational changes that may be important for the role of Spx in regulating organosulfur metabolism.

publication date

  • November 2009



  • Academic Article



  • eng

PubMed Central ID

  • PMC2757488

Digital Object Identifier (DOI)

  • 10.1016/j.jsb.2009.07.001

PubMed ID

  • 19580872

Additional Document Info

start page

  • 352

end page

  • 6


  • 168


  • 2