Inhibitors | Comment | Organism | Structure |
---|---|---|---|
O2 | above 4.8% | Bos taurus | |
tyrosine | 0.1 mM | Bos taurus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
additional information | - |
additional information | Km is dependent on substrate and cofactor concentration when (6R)-L-erythro-tetrahydrobiopterin is used due to inhibitory effects | Bos taurus |
Localization | Comment | Organism | GeneOntology No. | Textmining |
---|---|---|---|---|
cytosol | - |
Bos taurus | 5829 | - |
Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
280000 | - |
gel filtration | Bos taurus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
L-tyrosine + (6R)-L-erythro-1',2'-dihydroxypropyltetrahydropterin + O2 | Bos taurus | first step in biosynthesis of catecholamines such as norepinephrine, epinephrine and dopamine | ? | - |
? | |
L-tyrosine + tetrahydrobiopterin + O2 | Bos taurus | first step in biosynthesis of catecholamines such as norepinephrine, epinephrine and dopamine | 3,4-dihydroxy-L-phenylalanine + dihydrobiopterin + H2O | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Bos taurus | - |
- |
- |
Purification (Comment) | Organism |
---|---|
from adrenal medulla | Bos taurus |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
adrenal medulla | - |
Bos taurus | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
0.21 | - |
purified enzyme | Bos taurus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
L-tyrosine + (6R)-L-erythro-1',2'-dihydroxypropyltetrahydropterin + O2 | first step in biosynthesis of catecholamines such as norepinephrine, epinephrine and dopamine | Bos taurus | ? | - |
? | |
L-tyrosine + (6R)-L-erythro-tetrahydrobiopterin + O2 | tyrosine at 0.1 mM and O2 at 4.8% inhibit with (6R)-L-erythro-tetrahydrobiopterin as electron donor, depending on O2 and cofactor concentration | Bos taurus | ? | - |
? | |
L-tyrosine + tetrahydrobiopterin + O2 | - |
Bos taurus | 3,4-dihydroxy-L-phenylalanine + dihydrobiopterin + H2O | 3,4-dihydroxy-L-phenylalanine is identical with dopa | ? | |
L-tyrosine + tetrahydrobiopterin + O2 | first step in biosynthesis of catecholamines such as norepinephrine, epinephrine and dopamine | Bos taurus | 3,4-dihydroxy-L-phenylalanine + dihydrobiopterin + H2O | - |
? |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
37 | - |
assay at | Bos taurus |