Any feedback?
Please rate this page
(literature.php)
(0/150)

BRENDA support

Literature summary for 1.14.18.1 extracted from

  • Garcia-Carreno, F.L.; Cota, K.; Navarrete Del Toro, M.A.
    Phenoloxidase activity of hemocyanin in whiteleg shrimp Penaeus vannamei: conversion, characterization of catalytic properties, and role in postmortem melanosis (2008), J. Agric. Food Chem., 56, 6454-6459.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
chymotrypsin chymotrypsin is more effective in converting hemocyanin to hemocyanin-phenoloxidase than is trypsin Penaeus vannamei
SDS hemocyanin-phenoloxidase activity increases with increasing concentrations of SDS, up to 2.22 mM Penaeus vannamei
Trypsin trypsin has only a weak effect on hemocyanin conversion to hemocyanin-phenoloxidase, compared to SDS Penaeus vannamei

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.5
-
L-Dopa in 15 mM Tris-HCl at pH 7.8, with 5 mM CaCl2 and 5 mM MgCl2 Penaeus vannamei

Organism

Organism UniProt Comment Textmining
Penaeus vannamei
-
whiteleg shrimp
-

Purification (Commentary)

Purification (Comment) Organism
Sepharose 6B column chromatography Penaeus vannamei

Source Tissue

Source Tissue Comment Organism Textmining
hemolymph
-
Penaeus vannamei
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
L-DOPA + O2
-
Penaeus vannamei dopaquinone + H2O
-
?
L-tyrosine + O2
-
Penaeus vannamei L-DOPA + H2O
-
?
additional information native hemocyanin in whiteleg shrimp does not have phenoloxidase activity, but when incubated with SDS, hemocyanin is converted into hemocyanin-phenoloxidase Penaeus vannamei ?
-
?
tyramine + O2
-
Penaeus vannamei 4-(2-aminoethyl)cyclohexa-3,5-diene-1,2-dione + H2O
-
?

Synonyms

Synonyms Comment Organism
Hc-phenoloxidase
-
Penaeus vannamei
HcPO
-
Penaeus vannamei
monophenol, L-DOPA: oxygen oxidoreductase
-
Penaeus vannamei
polyphenoloxidase
-
Penaeus vannamei
tyrosinase
-
Penaeus vannamei

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
45
-
about 45°C Penaeus vannamei