Resonance Raman characterization of the mononuclear iron active-site vibrations and putative electron transport pathways in Pyrococcus furious superoxide reductase

Resonance Raman results indicate that the electron transfer from rubredoxin to the mononuclear iron active site is mediated via superexchange pathways. Data show extensive coupling between the iron-sulfur stretching mode and the vibrational mode of cysteine.