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Literature summary for 1.14.18.1 extracted from

  • Ben-Shalom, N.; Kahn, V.; Harel, E.; Mayer, A.M.
    Catechol oxidase from green olives: properties and partial purification (1977), Phytochemistry, 16, 1153-1158.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
2-mercaptoethanol 0.029 mM, 50% inhibition Olea europaea
8-hydroxyquinoline 1.3 mM, 50% inhibition Olea europaea
benzoic acid 0.2 mM, 50% inhibition Olea europaea
citrate
-
Olea europaea
Cl- 6 mM, 50% inhibition at pH 4.5, 34 mM, 50% inhibition at pH 5 Olea europaea
diethyldithiocarbamate 0.0051 mM, 50% inhibition Olea europaea
Salicylaldoxime 0.43 mM, 50% inhibition Olea europaea
Sodium bisulfite 0.062 mM, 50% inhibition Olea europaea
Thiourea 0.8 mM, 50% inhibition Olea europaea

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.3
-
4-methylcatechol
-
Olea europaea
5
-
chlorogenic acid
-
Olea europaea
8.3
-
catechol
-
Olea europaea

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
42000
-
gel filtration Olea europaea

Organism

Organism UniProt Comment Textmining
Olea europaea
-
green olive
-

Purification (Commentary)

Purification (Comment) Organism
ammonium sulfate, Sephadex G-100, DEAE cellulose, partially purified Olea europaea

Source Tissue

Source Tissue Comment Organism Textmining
fruit
-
Olea europaea
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
0.281 units, 1 unit is defined as 0.0024 ml O2/min Olea europaea

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4-methylcatechol + O2
-
Olea europaea 4-methyl-o-benzoquinone + H2O
-
?
catechol + 1/2 O2
-
Olea europaea 1,2-benzoquinone + H2O
-
?
chlorogenic acid + O2
-
Olea europaea chlorogenoquinone + H2O
-
?
D-catechin + O2
-
Olea europaea ?
-
?
dopamine + 1/2 O2
-
Olea europaea dopamine quinone + H2O
-
?
protocatechuic acid + O2
-
Olea europaea ?
-
?

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
70
-
half-life 15 min Olea europaea
75
-
half-life 19 min Olea europaea

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.5
-
-
Olea europaea

pH Range

pH Minimum pH Maximum Comment Organism
3.5 6 about 40% of maximal activity at pH 3.4 and pH 6.0, catechol oxidase in Na-acetate buffer Olea europaea

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.2
-
benzoic acid
-
Olea europaea