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Literature summary for 1.1.3.9 extracted from

  • Hamilton, G.A.; Adolf, P.K.; de Jersey, J.; DuBois, G.C.; Dyrkacz, G.R.; Libby, R.D.
    Trivalent copper, superoxide, and galactose oxidase (1978), J. Am. Chem. Soc., 100, 1899-1912.
No PubMed abstract available

Activating Compound

Activating Compound Comment Organism Structure
chloroiridate marked increase of activity Hypomyces rosellus
EDTA up to 7fold activation Hypomyces rosellus
ferricyanide marked activation at 1 mM Hypomyces rosellus
superoxide stimulation of O2 uptake Hypomyces rosellus

Inhibitors

Inhibitors Comment Organism Structure
ferricyanide inhibition at 0.001 mM, activation at 1 mM Hypomyces rosellus
H2O2 irreversible inactivation, only during active catalysis Hypomyces rosellus
Superoxide dismutase 50% inhibition at 50 pM Hypomyces rosellus

Localization

Localization Comment Organism GeneOntology No. Textmining
extracellular
-
Hypomyces rosellus
-
-
extracellular
-
Polyporus circinatus
-
-

Metals/Ions

Metals/Ions Comment Organism Structure
Cu3+ first evidence of oxidation by the Cu(III) enzyme with concomitant formation of a Cu(I) enzyme Hypomyces rosellus
Mn2+ marked increase of actvitiy at micromolar concentrations Hypomyces rosellus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
D-galactosylpyranoside + O2 Hypomyces rosellus
-
D-galacto-hexodialdose + H2O2
-
?
D-galactosylpyranoside + O2 Polyporus circinatus
-
D-galacto-hexodialdose + H2O2
-
?

Organism

Organism UniProt Comment Textmining
Hypomyces rosellus
-
-
-
Polyporus circinatus
-
-
-

Purification (Commentary)

Purification (Comment) Organism
to homogeneity, chromatography techniques Hypomyces rosellus

Source Tissue

Source Tissue Comment Organism Textmining
mycelium
-
Hypomyces rosellus
-
mycelium
-
Polyporus circinatus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
468
-
-
Hypomyces rosellus

Storage Stability

Storage Stability Organism
4°C, 0.01 M phosphate buffer, pH 7.0, 0.1 mg/ml protein, 30% decrease of activity in 1 year Hypomyces rosellus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1-O-methyl-alpha-D-galactosylpyranoside + O2
-
Hypomyces rosellus 1-O-methyl-alpha-D-galacto-hexodialdose + H2O2
-
?
1-O-methyl-alpha-D-galactosylpyranoside + O2
-
Hypomyces rosellus 1-O-methyl-alpha-D-galacto-hexodialdose + H2O2
-
ir
1-O-methyl-alpha-D-galactosylpyranoside + O2
-
Polyporus circinatus 1-O-methyl-alpha-D-galacto-hexodialdose + H2O2
-
?
D-galactopyranose + ferricyanide ferricyanide poorly replaces O2 as electron acceptor Hypomyces rosellus D-galacto-hexodialdose + ferrocyanide
-
?
D-galactosylpyranoside + O2
-
Hypomyces rosellus D-galacto-hexodialdose + H2O2
-
?
D-galactosylpyranoside + O2
-
Polyporus circinatus D-galacto-hexodialdose + H2O2
-
?

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
20
-
1-O-methyl-alpha-D-galactopyranoside
-
Hypomyces rosellus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6 7
-
Hypomyces rosellus

pH Stability

pH Stability pH Stability Maximum Comment Organism
5.5
-
slow inactivation below Hypomyces rosellus
8
-
slow inactivation above Hypomyces rosellus