General Stability | Organism |
---|---|
gelatin, catalase, peroxidase and methemoglobin protect against inactivation | Cucurbita pepo condensa |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
3,4,5-hydroxybenzoic acid propyl ester | - |
Cucurbita pepo condensa | |
3,4-Dichlorophenylserine | - |
Cucurbita pepo condensa | |
8-hydroxyquinoline | - |
Cucurbita pepo condensa | |
alpha-tocopherol | - |
Cucurbita pepo condensa | |
Anthocyanin pigments | - |
Cucurbita pepo condensa | |
Auxin analogs | - |
Cucurbita pepo condensa | |
azide | - |
Cucurbita pepo condensa | |
Carotenes | - |
Cucurbita pepo condensa | |
Cu2+ | - |
Cucurbita pepo condensa | |
Cupferron | - |
Cucurbita pepo condensa | |
cyanide | - |
Cucurbita pepo condensa | |
deoxycorticosterone | - |
Cucurbita pepo condensa | |
diethyldithiocarbamate | - |
Cucurbita pepo condensa | |
ethyl xanthate | - |
Cucurbita pepo condensa | |
H2O2 | - |
Cucurbita pepo condensa | |
H2S | - |
Cucurbita pepo condensa | |
Hg2+ | 0.01 mM, appreciable inhibition | Cucurbita pepo condensa | |
iodoacetate | - |
Cucurbita pepo condensa | |
leucocyanidol | - |
Cucurbita pepo condensa | |
additional information | natural inhibitors: cabbage extract, tomato extract, strawberry juice, extract of lemons, oranges, parsley, hips, leeks | Cucurbita pepo condensa | |
Ni2+ | some authors found inhibition, others not | Cucurbita pepo condensa | |
nordihydroguaiaretic acid | - |
Cucurbita pepo condensa | |
organic mercurials | - |
Cucurbita pepo condensa | |
p-mercuribenzoate | some authors report inhibition, others do not | Cucurbita pepo condensa | |
Pyridine-KCNS | - |
Cucurbita pepo condensa | |
Salicylaldoxime | - |
Cucurbita pepo condensa | |
SO2 | - |
Cucurbita pepo condensa | |
Tetraethylthiuramidisulfide | - |
Cucurbita pepo condensa | |
thiamine | - |
Cucurbita pepo condensa | |
Thiourea | - |
Cucurbita pepo condensa | |
Zn2+ | some authors found inhibition, others not | Cucurbita pepo condensa |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.039 | - |
L-ascorbate | spectrometric assay | Cucurbita pepo condensa | |
0.24 | - |
L-ascorbate | spectrometric assay | Cucurbita pepo condensa | |
0.42 | - |
L-ascorbate | manomeric assay following the rate of O2 uptake | Cucurbita pepo condensa | |
2 | - |
L-ascorbate | manomeric assay following the rate of O2 uptake | Cucurbita pepo condensa | |
5 | - |
L-ascorbate | manomeric assay following the rate of O2 uptake | Cucurbita pepo condensa |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
copper | a multicopper protein, 6 atoms of copper per enzyme molecule | Cucurbita pepo condensa |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Cucurbita pepo condensa | - |
- |
- |
Posttranslational Modification | Comment | Organism |
---|---|---|
glycoprotein | enzyme may be a protein-copper carbohydrate complex | Cucurbita pepo condensa |
Reaction | Comment | Organism | Reaction ID |
---|---|---|---|
4 L-ascorbate + O2 = 4 monodehydroascorbate + 2 H2O | mechanism: Cu2+ is reduced to Cu+, which is then reoxidized by oxygen | Cucurbita pepo condensa |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
2 hydroquinone + O2 | at pH 7.2 | Cucurbita pepo condensa | 2 quinone + 2 H2O | - |
? | |
2 L-ascorbate + O2 | no appreciable activity with: p-phenylenediamine, Na2S2O3, glutathione and cysteine | Cucurbita pepo condensa | 2 L-dehydroascorbate + 2 H2O | - |
? | |
2,5-dichlorohydroquinone + O2 | - |
Cucurbita pepo condensa | 2,5-dichloroquinone + H2O | - |
? | |
2,6-dichlorohydroquinone + O2 | - |
Cucurbita pepo condensa | 2,6-dichloroquinone + H2O | - |
? | |
D-glucoascorbic acid + O2 | - |
Cucurbita pepo condensa | D-glucodehydroascorbate + H2O | - |
? | |
D-isoascorbic acid + O2 | - |
Cucurbita pepo condensa | 2-dehydroisoascorbate + H2O | - |
? |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
4170 | - |
L-ascorbate | manometric assay | Cucurbita pepo condensa | |
10800 | - |
L-ascorbate | spectrometric assay | Cucurbita pepo condensa |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
5.6 | - |
- |
Cucurbita pepo condensa |
pH Stability | pH Stability Maximum | Comment | Organism |
---|---|---|---|
4 | - |
irreversible loss of activity below | Cucurbita pepo condensa |