Mössbauer and X-ray investigation of model compounds for the P460 center of hydroxylamine oxidoreductase from nitrosomonas

E. Bill, A. Gismelseed, D. Laroque, A. X. Trautwein, H. Nasri, J. Fischer, R. Weiss

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The divalent high-spin iron in the P460 center of hydroxylamine oxidoreductase and in three possible "picket fence" heme models exhibit extremely large quadrupole splittings (∼4 mms-1). Their isomer shifts of about 1 mms-1 are consistent with the X-ray results of two of the models, i.e. that Fe(II) is pentacoordinated. The coordination geometry of iron deviates considerably from the common fourfold symmetry of the "picket fence" porphyrin due to a CH3CO2 - ligand. This feature is also reflected by the significant anisotropies of g-factors, A tensor and rhombicity E/D.

Original languageEnglish
Pages (from-to)881-884
Number of pages4
JournalHyperfine Interactions
Issue number1-4
Publication statusPublished - Feb 1988


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Electronic, Optical and Magnetic Materials

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