New tetragonal form of reaction centers from Rhodobacter sphaeroides and the involvement of a manganese ion at a crystal contact point

G. Uyeda, A. Cámara-Artigas, J. C. Williams, J. P. Allen

Research output: Contribution to journalArticle


Crystals have been obtained of wild-type reaction centers from Rhodobacter sphaeroides using manganese chloride as a precipitating agent. The crystals belong to the tetragonal space group P4222, with unit-cell parameters a = b = 207.8, c = 107.5 Å. The crystal structure has been determined to a resolution limit of 4.6 Å using a previously determined structure of the reaction center as a molecular-replacement model. The calculated electron-density maps show the presence of a manganese ion at one of the crystal contact points bridging two symmetry-related histidine residues, suggesting that the metal plays a key role in facilitating the crystallization of the protein in this form.

Original languageEnglish
Pages (from-to)733-736
Number of pages4
JournalActa Crystallographica Section F: Structural Biology and Crystallization Communications
Issue number8
Publication statusPublished - Aug 1 2005


ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Genetics
  • Condensed Matter Physics

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