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1.14.18.1: tyrosinase

This is an abbreviated version!
For detailed information about tyrosinase, go to the full flat file.

Word Map on EC 1.14.18.1

Reaction

2 L-dopa +

O2
= 2 dopaquinone + 2 H2O

Synonyms

AbPPO1, AbPPO4, AbTYR, aurone synthase, catalase-phenol oxidase, catechol oxidase, catecholase, CATPO, chlorogenic acid oxidase, chlorogenic oxidase, cresolase, cresolase/monophenolase, CsPPO, CZA14Tyr, deoxy-tyrosinase, dihydroxy-L-phenylalanine:oxygen oxidoreductase, Diphenol oxidase, diphenolase, dopa oxidase, EC 1.10.3.1, EC 1.14.17.2, Hc-derived phenoloxidase, Hc-phenoloxidase, HcPO, HdPO, hemocyanin-derived phenoloxidase, jrPPO1, jrTYR, L-DOPA monophenolase, L-DOPA oxidase, L-DOPA:oxygen oxidoreductase, L-tyrosine hydroxylase, MdPPO1, melC2, MelC2 tyrosinase, met-tyrosinase, monophenol dihydroxyphenylalanine:oxygen oxidoreductase, monophenol monooxidase, monophenol monooxygenase, monophenol monoxygenase, monophenol oxidase, monophenol oxygen oxidoreductase, monophenol, 3,4-dihydroxy L-phenylalanine (L-DOPA):oxygen oxidoreductase, monophenol, dihydroxy-L-phenylalanine oxygen oxidoreductase, monophenol, dihydroxy-L-phenylalanine:oxygen oxidoreductase, monophenol, dihydroxyphenylalanine:oxygen oxidoreductase, monophenol, L-Dopa: oxidoreductase, monophenol, L-DOPA: oxygen oxidoreductase, monophenol, o-diphenol: oxygen oxidoreductase, monophenol, o-diphenol:O2 oxidoreductase, monophenol, o-diphenol:oxygen oxido-reductase, monophenol, o-diphenol:oxygen oxidoreductase, monophenol, polyphenol oxidase, monophenol: dioxygen oxidoreductases, hydroxylating, monophenolase, monphenol mono-oxygenase, More, mTyr, murine tyrosinase, mushroom tyrosinase, mushroom tyrosine, N-acetyl-6-hydroxytryptophan oxidase, o-diphenol oxidase, o-diphenol oxidoreductase, o-diphenol oxygen oxidoreductase, o-diphenol: O2 oxidoreductase, o-diphenol: oxidoreductase, o-diphenol:O2 oxidoreductase, o-diphenol:oxygen oxidoreductase, o-diphenolase, OCA1, Orf13, oxygen oxidoreductase, phenol oxidase, phenol oxidases, phenolase, phenoloxidase, PO, polyaromatic oxidase, polyphenol oxidase, polyphenol oxidase 3, polyphenol oxidase 4, polyphenol oxidase B, polyphenolase, polyphenoloxidase, PotPPO, PPO, PPO 3, PPO B, PPO1, PPO2, PPO3, pro-PO III, prophenoloxidase III, pyrocatechol oxidase, SPRTyr, ST94, ST94t, tryosinase, tryrosinase, TY, tyr, TYR1, TYR2, tyrA, TyrBm, tyrosinase, tyrosinase 2, tyrosinase 4, tyrosinase diphenolase, tyrosine-dopa oxidase

ECTree

     1 Oxidoreductases
         1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
             1.14.18 With another compound as one donor, and incorporation of one atom of oxygen into the other donor
                1.14.18.1 tyrosinase

Temperature Range

Temperature Range on EC 1.14.18.1 - tyrosinase

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TEMPERATURE RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
0 - 85
-
the reaction is carried out at various temperatures and pH values with the substrates catechol, dopamine and chorogenic acid. PPO activity is measured at different temperatures in the range from 0 to 85°C using the 3 different substrates to determine the optimum temperature of the enzyme
10 - 40
-
PPO is immobilized onto MAC400 and MAC200 at various enzyme activities 50000, 100000, 200000, 300000 U/l, at pH 5-8, and at temperature ranging from 10 to 40°C
15 - 75
-
determine optimum temperature and thermostability
20 - 45
20 - 60
-
activity range
20 - 65
-
activity range, profile overview
20 - 70
20 - 75
-
thermal inactivation of PPO is investigated at 35, 55 and 75°C. The optimum temperature at 30 and 40°C. PPO activity is also measured at temperatures ranging from 20 to 60°C by using different substrates. The enzyme activity decreases with increasing temperature
22 - 25
25 - 65
-
25°C: about 50% of maximal activity, 65°C: about 45% of maximal activity, polyphenol oxidase I and II
25 - 70
30 - 65
-
activity range, profile overview
30 - 70
-
about 55% of maximal activity at 30°C and at 70°C
5 - 50
-
at the shortest treatment time (5 min) the highest activity is seen at 5°C
5 - 60
activity range, profile overview
5 - 70
5 - 80
-
-
55 - 85
-
55°C: about 75% of maximal activity, 85°C: about 80% of maximal activity
additional information
-
the experiment is carried out only under the conditions of temperature (8 and 25°C) and pH (3.0 and 10.0 units) used in the PPO study, conditions at which the enzyme shows no activity or only a reduced proportion of it