Inhibitors | Comment | Organism | Structure |
---|---|---|---|
(S)-orteronel | three times more inhibitory toward the conversion of 17alpha-hydroxypregnenolone to dehydroepiandrosterone than toward the 17alpha-hydroxylation of pregnenolone. The (S)-enantiomer of orteronel is more inhibitory than the (R) enantiomer | Homo sapiens |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0005 | - |
pregnenolone | pH 7.4, 37°C | Homo sapiens | |
0.0011 | - |
progesterone | 16alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens | |
0.0011 | - |
pregnenolone | pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
0.0043 | - |
progesterone | 17alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
0.0053 | - |
progesterone | 16alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
0.0097 | - |
progesterone | 17alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Homo sapiens | P05093 | - |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | P450 17A1 is an inherently distributive enzyme but some processivity is present, i.e. some of the 17alpha-hydroxypregnenolone formed from pregnenolone does not dissociate from P450 17A1 before conversion to dehydroepiandrosterone | Homo sapiens | ? | - |
? | |
pregnenolone + [reduced NADPH-hemoprotein reductase] + O2 | - |
Homo sapiens | 17alpha-hydroxypregnenolone + [oxidized NADPH-hemoprotein reductase] + H2O | - |
? | |
progesterone + [reduced NADPH-hemoprotein reductase] + O2 | - |
Homo sapiens | 17alpha-hydroxyprogesterone + [oxidized NADPH-hemoprotein reductase] + H2O | - |
? | |
progesterone + [reduced NADPH-hemoprotein reductase] + O2 | - |
Homo sapiens | 16alpha-hydroxyprogesterone + [oxidized NADPH-hemoprotein reductase] + H2O | - |
? |
Synonyms | Comment | Organism |
---|---|---|
P450 17A1 | - |
Homo sapiens |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.0037 | - |
pregnenolone | pH 7.4, 37°C | Homo sapiens | |
0.0064 | - |
progesterone | 16alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens | |
0.025 | - |
progesterone | 16alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
0.086 | - |
progesterone | 17alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens | |
0.11 | - |
pregnenolone | pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
0.17 | - |
progesterone | 17alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens |
kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
4.7 | - |
progesterone | 16alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
5.8 | - |
progesterone | 16alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens | |
7.4 | - |
pregnenolone | 17alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens | |
8.9 | - |
progesterone | 17alpha-hydroxylation, pH 7.4, 37°C | Homo sapiens | |
40 | - |
progesterone | 17alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens | |
100 | - |
pregnenolone | 17alpha-hydroxylation, pH 7.4, 37°C, presence of cytochrome b5 | Homo sapiens |