Protein Variants | Comment | Organism |
---|---|---|
I118S | site-directed mutagenesis, the mutat shows an altered active site compared to the wild-type and formation of a high-valent iron-oxo species when the mutant protein is reacted with H2O2.. For I118S, formation of the iron-oxo species can also result from the cleavage of the O-O bond of an FeIII-OOH intermediate | Desulfarculus baarsii |
K48I | site-directed mutagenesis, the mutat shows an altered active site compared to the wild-type and formation of a high-valent iron-oxo species when the mutant protein is reacted with H2O2. For the K48I mutant, the Fe=O species is formed from the FeIII-OOH species | Desulfarculus baarsii |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Fe2+ | SOR is a small non-heme mononuclear iron protein, formation of high-valent iron-oxo species in superoxide reductase, analysis by resonance Raman spectroscopy, overview | Desulfarculus baarsii |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
superoxide + reduced rubredoxin + 2 H+ | Desulfarculus baarsii | - |
H2O2 + oxidized rubredoxin | - |
? | |
superoxide + reduced rubredoxin + 2 H+ | Desulfarculus baarsii ATCC 33931 / DSM 2075 / VKM B-1802 / 2st14 | - |
H2O2 + oxidized rubredoxin | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Desulfarculus baarsii | - |
- |
- |
Desulfarculus baarsii ATCC 33931 / DSM 2075 / VKM B-1802 / 2st14 | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
superoxide + reduced rubredoxin + 2 H+ | - |
Desulfarculus baarsii | H2O2 + oxidized rubredoxin | - |
? | |
superoxide + reduced rubredoxin + 2 H+ | - |
Desulfarculus baarsii ATCC 33931 / DSM 2075 / VKM B-1802 / 2st14 | H2O2 + oxidized rubredoxin | - |
? |
Synonyms | Comment | Organism |
---|---|---|
SOR | - |
Desulfarculus baarsii |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
rubredoxin | - |
Desulfarculus baarsii |
General Information | Comment | Organism |
---|---|---|
malfunction | mutation of two residues in the second coordination sphere of the SOR iron active site, K48 and I118, leads to the formation of a high-valent iron-oxo species when the mutant proteins are reacted with H2O2 | Desulfarculus baarsii |
additional information | the enzyme is used as an unprecedented model to study the mechanisms of O2 activation and of the formation of high-valent iron-oxo species in metalloenzymes. Formation of high-valent iron-oxo species in superoxide reductase, analysis by resonance Raman spectroscopy, overview | Desulfarculus baarsii |
physiological function | superoxide reductase (SOR )is a small non-heme iron protein that is not involved in oxidation reactions, but in superoxide radical detoxification in microorganisms | Desulfarculus baarsii |