Inhibitors | Comment | Organism | Structure |
---|---|---|---|
arsenite | - |
Escherichia coli | |
Br- | - |
Escherichia coli | |
Cl- | - |
Escherichia coli | |
CN- | - |
Escherichia coli | |
CO | - |
Escherichia coli | |
F- | - |
Escherichia coli | |
NADP+ | NADPH-dependent activities | Escherichia coli | |
NO3- | - |
Escherichia coli | |
p-Mercuriphenylsulfonate | - |
Escherichia coli | |
SCN- | - |
Escherichia coli | |
sulfate | - |
Escherichia coli |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0043 | 0.0074 | sulfite | - |
Escherichia coli | |
0.8 | 1.5 | nitrite | - |
Escherichia coli | |
4.5 | 10.5 | hydroxylamine | - |
Escherichia coli |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
sulfite + NADPH + H+ | Escherichia coli | no physiological nitrite reductase | sulfide + NADP+ + H2O | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Escherichia coli | - |
- |
- |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
hydrogen sulfide + 3 NADP+ + 3 H2O = sulfite + 3 NADPH + 3 H+ | mechanism of electron transfer | Escherichia coli |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
hydroxylamine + NADPH | NADPH can be replaced by reduced methyl viologen | Escherichia coli | ammonia + NADP+ | - |
? | |
additional information | transfer of hydrogen from NADPH to 3-acetylpyridineadenine dinucleotide phosphate | Escherichia coli | ? | - |
? | |
additional information | reactions catalyzed by flavoprotein subunit alone: transfer of electrons from NADPH to cytochrome c, ferricyanide, dichlorphenolindophenol, menadione, FMN, FAD, O2 | Escherichia coli | ? | - |
? | |
NADP+ + reduced methyl viologen | - |
Escherichia coli | NADPH + oxidized methyl viologen | - |
? | |
nitrite + NADPH | - |
Escherichia coli | ammonia + NADP+ | - |
? | |
sulfite + NADPH | NADPH can be replaced by reduced methyl viologen | Escherichia coli | sulfide + NADP+ + H2O | - |
? | |
sulfite + NADPH + H+ | no physiological nitrite reductase | Escherichia coli | sulfide + NADP+ + H2O | - |
? |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
1.25 | - |
NADPH | cosubstrate O2 | Escherichia coli | |
30 | 40 | sulfite | cosubstrate NADPH | Escherichia coli | |
43.3 | 51.7 | nitrite | cosubstrate NADPH | Escherichia coli | |
65 | - |
sulfite | cosubstrate reduced methyl viologen | Escherichia coli | |
98.3 | 217 | hydroxylamine | cosubstrate NADPH | Escherichia coli | |
158 | - |
NADPH | cosubstrate 3-acetylpyridineadenine dinucleotide phosphate | Escherichia coli | |
172 | - |
NADPH | cosubstrate FMN | Escherichia coli | |
318 | - |
NADPH | cosubstrate cytochrome c | Escherichia coli | |
462 | - |
NADPH | cosubstrate dichlorphenolindophenol | Escherichia coli | |
468 | - |
NADPH | cosubstrate ferricyanide | Escherichia coli | |
605 | - |
NADP+ | - |
Escherichia coli | |
605 | - |
reduced methyl viologen | - |
Escherichia coli |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
7.9 | - |
sulfite | Escherichia coli |
8.6 | - |
nitrite | Escherichia coli |
9.5 | - |
hydroxylamine | Escherichia coli |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
flavin | treatment with p-chloromercuriphenylsulfonate causes dissociation of FMN but retetion of FAD and heme | Escherichia coli |