MÖSSBAUER EFFECT STUDIES ON THE FOUR-IRON CENTRES OF TWO IRON-SULPHUR PROTEINS

D. Dickson , C. A. Johnson , C. Thompson , R. Cammack , M. Evans , D. Hall , K. Rao , U. Weser

57Fe Mössbauer effect studies have been carried out on the ferredoxin from Clostridium pasteurianum and on the high potential iron-sulphur protein (HiPIP) from Chromatium to investigate the 4 Fe-4 S centres found in these proteins. A consideration of the chemical shifts in the different redox states of the proteins enables a characterization of the iron atoms in terms of formal valences. The observed magnetic hyperfine fields give evidence for anti-ferromagnetic coupling of the iron atoms within each centre. The Mössbauer spectroscopy data is used to justify a model for the iron atoms in the centre.

Domaines: Articles anciens

D. Dickson, C. A. Johnson, C. Thompson, R. Cammack, M. Evans, et al.. MÖSSBAUER EFFECT STUDIES ON THE FOUR-IRON CENTRES OF TWO IRON-SULPHUR PROTEINS. Journal de Physique Colloques, 1974, 35 (C6), pp.C6-343-C6-346. ⟨10.1051/jphyscol:1974659⟩. ⟨jpa-00215816⟩