Activating Compound | Comment | Organism | Structure |
---|---|---|---|
4,5-dihydroxy-1,3-benzene disulfonic acid | - |
Arabidopsis thaliana | |
6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid | significantly increases enzyme activity | Arabidopsis thaliana | |
dehydroascorbate | - |
Arabidopsis thaliana | |
desferrioxamine | - |
Arabidopsis thaliana | |
isoascorbate | - |
Arabidopsis thaliana | |
L-ascorbate | the enzyme requires an iron chelator and second reductant, such as L-ascorbate, for full activity | Arabidopsis thaliana | |
o-phenanthroline | - |
Arabidopsis thaliana | |
Trolox | - |
Arabidopsis thaliana |
Cloned (Comment) | Organism |
---|---|
expressed in Escherichia coli BL21 cells | Arabidopsis thaliana |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0013 | - |
hemin | at pH 7.2 and 25°C | Arabidopsis thaliana |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
27000 | - |
x * 27000, recombinant enzyme, SDS-PAGE | Arabidopsis thaliana |
53000 | - |
gel filtration | Arabidopsis thaliana |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
hemin + reduced ferredoxin [iron-sulfur] cluster + O2 + H+ | Arabidopsis thaliana | - |
biliverdin IXalpha + Fe2+ + CO + oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Arabidopsis thaliana | - |
- |
- |
Purification (Comment) | Organism |
---|---|
Q sepharose column chromatography | Arabidopsis thaliana |
Storage Stability | Organism |
---|---|
-30°C, in 50 mM HEPES-NaOH (pH 7.2) with 40% (v/v) glycerol, at least 3 months, no loss of activity | Arabidopsis thaliana |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
hemin + reduced ferredoxin [iron-sulfur] cluster + O2 + H+ | - |
Arabidopsis thaliana | biliverdin IXalpha + Fe2+ + CO + oxidized ferredoxin [iron-sulfur] cluster + H2O | - |
? |
Subunits | Comment | Organism |
---|---|---|
? | x * 27000, recombinant enzyme, SDS-PAGE | Arabidopsis thaliana |
? | x * 53000, GST-tagged enzyme, SDS-PAGE | Arabidopsis thaliana |
Synonyms | Comment | Organism |
---|---|---|
ferredoxin-dependent heme oxygenase | - |
Arabidopsis thaliana |
Ho1 | - |
Arabidopsis thaliana |
HY1 | - |
Arabidopsis thaliana |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
50 | - |
- |
Arabidopsis thaliana |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.2 | - |
- |
Arabidopsis thaliana |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
heme | the enzyme forms a 1:1 complex with heme | Arabidopsis thaliana |