KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.011 | - |
sulfite | 63K enzyme, reduced methyl viologen as electron donor | Spinacia oleracea | |
0.012 | - |
sulfite | 69K enzyme, reduced methyl viologen as electron donor | Spinacia oleracea | |
0.019 | - |
reduced ferredoxin | 69K enzyme | Spinacia oleracea | |
0.021 | - |
sulfite | 63K enzyme, ferredoxin als electeron donor | Spinacia oleracea | |
0.021 | - |
reduced ferredoxin | 63K enzyme | Spinacia oleracea | |
0.025 | - |
sulfite | 69K enzyme, ferredoxin as electron donor | Spinacia oleracea |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
4Fe-4S | 1 mol per mol subunit | Spinacia oleracea |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
63000 | - |
2 * 63000, 63K form of the enzyme, 50 mM phosphate buffer pH 7.7, 20°C, SDS-PAGE | Spinacia oleracea |
69000 | - |
2 * 69000, 69K form of the enzyme, probably partially processed to a 63000 Da species, 50 mM phosphate buffer pH 7.7, 20°C, SDS-PAGE | Spinacia oleracea |
112000 | 119000 | 63K enzyme, equilibrium sedimentation, gel filtration | Spinacia oleracea |
134000 | - |
69K enzyme, equilibrium sedimentation | Spinacia oleracea |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
sulfite + reduced ferredoxin | Spinacia oleracea | - |
hydrogen sulfide + oxidized ferredoxin + H2O | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Spinacia oleracea | - |
- |
- |
Purification (Comment) | Organism |
---|---|
- |
Spinacia oleracea |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
8.9 | - |
69K enzyme | Spinacia oleracea |
10.3 | - |
63K enzyme | Spinacia oleracea |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
sulfite + reduced ferredoxin | - |
Spinacia oleracea | hydrogen sulfide + oxidized ferredoxin + H2O | - |
? | |
sulfite + reduced ferredoxin | reduced methyl viologen as electron donor also | Spinacia oleracea | hydrogen sulfide + oxidized ferredoxin + H2O | - |
? | |
sulfite + reduced ferredoxin + H+ | - |
Spinacia oleracea | hydrogen sulfide + oxidized ferredoxin + H2O | - |
r |
Subunits | Comment | Organism |
---|---|---|
dimer | 2 * 69000, 69K form of the enzyme, probably partially processed to a 63000 Da species, 50 mM phosphate buffer pH 7.7, 20°C, SDS-PAGE | Spinacia oleracea |
dimer | 2 * 63000, 63K form of the enzyme, 50 mM phosphate buffer pH 7.7, 20°C, SDS-PAGE | Spinacia oleracea |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
22 | - |
enzyme assay, reduced methyl viologen as electron donor | Spinacia oleracea |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
siroheme | 1 mol per mol subunit, in the high-spin Fe3+ state in the reduced enzyme | Spinacia oleracea |