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Literature summary for 1.14.18.1 extracted from

  • Wuyts, N.; De Waele, D.; Swennen, R.
    Extraction and partial characterization of polyphenol oxidase from banana (Musa acuminata Grande naine) roots (2006), Plant Physiol. Biochem., 44, 308-314.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
dithiothreitol strong inhibition Musa acuminata
Sodium metabisulfite strong inhibition Musa acuminata

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information no Michaelis-Menten kinetics Musa acuminata

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Musa acuminata the enzyme plays a role in enzymatic browning, rapid discolouration of leaf, stem and root tissue after injury and strong pigmentation of tissue extracts, PPO and phenolic compounds could be an important part of the plant’s defence system against pests and diseases, including root parasitic nematodes, e.g. Radopholus similis ?
-
?

Organism

Organism UniProt Comment Textmining
Musa acuminata
-
-
-

Purification (Commentary)

Purification (Comment) Organism
optimization of enzyme extraction from roots, best using 0.2 M phosphate buffer at pH 7.0 with 5% insoluble polyvinylpyrrolidone and 0.25% Triton X-100, overview Musa acuminata

Source Tissue

Source Tissue Comment Organism Textmining
fruit pulp and peel Musa acuminata
-
leaf
-
Musa acuminata
-
additional information tissue distribution, overview Musa acuminata
-
pulp
-
Musa acuminata
-
root
-
Musa acuminata
-
stem
-
Musa acuminata
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4-cresol + O2 root and pulp enzyme Musa acuminata ?
-
?
additional information the enzyme plays a role in enzymatic browning, rapid discolouration of leaf, stem and root tissue after injury and strong pigmentation of tissue extracts, PPO and phenolic compounds could be an important part of the plant’s defence system against pests and diseases, including root parasitic nematodes, e.g. Radopholus similis Musa acuminata ?
-
?
additional information no activity with L-tyrosine by the root and the pulp enzyme, the enzyme catalyzes the hydroxylation of monophenols to o-diphenols, monophenolase activity EC 1.14.18.1, and the oxidation of the o-diphenols to o-quinones, diphenolase activity EC 1.10.3.1, cross-reaction analysis, overview Musa acuminata ?
-
?

Synonyms

Synonyms Comment Organism
cresolase
-
Musa acuminata
More cf. EC 1.10.3.1 Musa acuminata
polyphenol oxidase
-
Musa acuminata
PPO
-
Musa acuminata

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
25
-
assay at Musa acuminata

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5
-
assay at Musa acuminata