Desulfoferrodoxins contains two types of iron: an Fe-S4 site very similar to that found in desulforedoxin from Desulfovibrio gigas and an octahedral coordinated high-spin ferrous site most probably with nitrogen/oxygen-containing ligands. Due to this ...
Desulfoferrodoxins contains two types of iron: an Fe-S4 site very similar to that found in desulforedoxin from Desulfovibrio gigas and an octahedral coordinated high-spin ferrous site most probably with nitrogen/oxygen-containing ligands. Due to this rather unusual combination of active centres, this novel protein is named desulfoferrodoxin [1].
Neelareductase, or superoxide reductase, from the thermophilic Archaea Pyrococcus furiosus, is able to catalyse the conversion of the superoxide radical O*- into the less toxic product hydrogen peroxide. It shares this ability with a number of homologous proteins from anaerobic bacteria and archaea where the removal of the superoxide radical, a product of anaerobic respiration in these organisms, is essential for their survival. It is part of a family of mononuclear non-haem iron containing proteins, which all have the iron coordinated with a pentacoordinate 4 His Cys motif and a variable 6th ligand.
Defined by 7 residues: GLU:A-14LYS:A-15HIS:A-16HIS:A-41HIS:A-47CYS:A-111HIS:A-114