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Literature summary for 1.10.3.3 extracted from

  • Porto, T.S.; Porto, C.S.; Cavalcanti, M.T.; Filho, J.L.; Perego, P.; Porto, A.L.; Converti, A.; Pessoa, A.
    Kinetic and thermodynamic investigation on ascorbate oxidase activity and stability of a Cucurbita maxima extract (2006), Biotechnol. Prog., 22, 1637-1642.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information Michaelis-Menten kinetics, and thermodynamics at 25-48 °C, detailed overview Cucurbita maxima
0.126
-
L-ascorbic acid pH 6.0, 25°C Cucurbita maxima

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2 L-ascorbic acid + O2 Cucurbita maxima
-
2 L-dehydroascorbic acid + 2 H2O
-
?

Organism

Organism UniProt Comment Textmining
Cucurbita maxima
-
var. jerimum caboclo
-

Source Tissue

Source Tissue Comment Organism Textmining
fruit
-
Cucurbita maxima
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2 L-ascorbic acid + O2
-
Cucurbita maxima 2 L-dehydroascorbic acid + 2 H2O
-
?

Subunits

Subunits Comment Organism
dimer
-
Cucurbita maxima

Synonyms

Synonyms Comment Organism
ascorbate oxidase
-
Cucurbita maxima

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Cucurbita maxima

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
10 70
-
Cucurbita maxima

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
additional information
-
the thermal inactivation is irreversible, a first-order reaction mechanism Cucurbita maxima
10
-
half-life: 1047 min Cucurbita maxima
70
-
half-life: 21.2 min Cucurbita maxima

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6
-
assay at Cucurbita maxima