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Literature summary for 1.10.3.1 extracted from

  • Gandia-Herrero, F.; Garcia-Carmona, F.; Escribano, J.
    Purification and characterization of a latent polyphenol oxidase from beet root (Beta vulgaris L.) (2004), J. Agric. Food Chem., 52, 609-615.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
SDS activates Beta vulgaris

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.02
-
L-Dopa pH 6.0, 25°C, soluble enzyme in presence of SDS Beta vulgaris
1.96
-
L-Dopa pH 6.0, 25°C, membrane enzyme in presence of SDS Beta vulgaris
2.45
-
L-Dopa pH 6.0, 25°C, soluble enzyme Beta vulgaris
6.18
-
L-Dopa pH 6.0, 25°C, membrane enzyme Beta vulgaris

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane
-
Beta vulgaris 16020
-
soluble
-
Beta vulgaris
-
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
54000
-
gel filtration Beta vulgaris
60000
-
1 * 60000, SDS-PAGE Beta vulgaris

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
L-dopa + 1/2 O2 Beta vulgaris
-
L-dopaquinone + H2O
-
?

Organism

Organism UniProt Comment Textmining
Beta vulgaris
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Beta vulgaris

Source Tissue

Source Tissue Comment Organism Textmining
root
-
Beta vulgaris
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-dopa + 1/2 O2
-
Beta vulgaris L-dopaquinone + H2O
-
?

Subunits

Subunits Comment Organism
monomer 1 * 60000, SDS-PAGE Beta vulgaris

Synonyms

Synonyms Comment Organism
polyphenol oxidase
-
Beta vulgaris
PPO
-
Beta vulgaris

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.5 7.5 soluble enzyme, in absence of SDS. Membrane PPO activity is almost negligible at these pH values Beta vulgaris

pI Value

Organism Comment pI Value Maximum pI Value
Beta vulgaris isoelectric focusing, soluble enzyme and membrane enzyme
-
5.2