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Literature summary for 1.14.18.1 extracted from

  • Gandia-Herrero, F.; Escribano, J.; Garcia-Carmona, F.
    Characterization of the activity of tyrosinase on betaxanthins derived from (R)-amino acids (2005), J. Agric. Food Chem., 53, 9207-9212.
    View publication on PubMed

Application

Application Comment Organism
additional information tyrosinase is an important enzyme in the food industry because during the processing of fruits and vegetables any wounding may cause cell disruption and lead to quinone formation, the enzymatic browning implies a considerable economic loss in the commercial production of fruits and vegetables, the appearance of food and beverages may be affected, as may the taste and its nutritional value, often decreasing the quality of the final product Agaricus bisporus

Metals/Ions

Metals/Ions Comment Organism Structure
Cu2+ copper-containing enzyme Agaricus bisporus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Agaricus bisporus role of the enzyme in the biosynthetic scheme of betalains, overview ?
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?

Organism

Organism UniProt Comment Textmining
Agaricus bisporus
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
commercial preparation
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Agaricus bisporus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Agaricus bisporus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
(R)-dopaxanthin + dehydroascorbic acid + O2 (R)-dopaxanthin is a pigment, the reaction rate on the (R)-isomer of dopaxanthin is 1.9fold lower than that for the (S)-isomer Agaricus bisporus (R)-dopaxanthin quinone + L-ascorbic acid + H2O quantitative product analysis ?
(R)-tyrosine-betaxanthin + L-DOPA + O2 i.e. (R)-portulacaxanthin II, the activity of the enzyme is not restricted to betaxanthins derived from (S)-amino acids Agaricus bisporus (R)-dopaxanthin + dopaquinone + H2O (R)-dopaxanthin is a pigment, quantitative product analysis ?
additional information role of the enzyme in the biosynthetic scheme of betalains, overview Agaricus bisporus ?
-
?
additional information streospecificity, and monophenolase and diphenolase activities and specificities dependent on conditions, overview Agaricus bisporus ?
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?

Synonyms

Synonyms Comment Organism
monophenol, o-diphenol:oxygen oxidoreductase
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Agaricus bisporus
monophenolase
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Agaricus bisporus
More cf. EC 1.10.3.1 Agaricus bisporus
tyrosinase
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Agaricus bisporus

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Agaricus bisporus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6
-
assay at Agaricus bisporus