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G7907

Sigma-Aldrich

Galactose Oxidase from Dactylium dendroides

≥30 units/mg solid

Synonym(s):

D-Galactose:oxygen 6-oxidoreductase

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About This Item

CAS Number:
Enzyme Commission number:
EC Number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54

biological source

fungus (Dactylium dendroides)

Quality Level

form

lyophilized

specific activity

≥30 units/mg solid

storage temp.

−20°C

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General description

Galactose oxidase is a member of radicalcoupled copper oxidases family. It is a fungal secretory enzyme.
Galactose oxidase is an extracellular copper-containing enzyme, secreted by the deuteromycete fungus Dactylium dendroides. It catalyzes the oxidation of a range of primary alcohols, including D-galactose, to the corresponding aldehyde, with reduction of oxygen to hydrogen peroxide.

Application

Galactose Oxidase from Dactylium dendroides has been used as a component for galactose oxidase treatment of arabinogalactan. It has also been used to co-immobilise with peroxidase for the preparation of a biosensor for galactose detection.
Galactose oxidase may be used as an analytical tool for the specific determination of D-galactose in blood plasma, plant extracts, and phospholipids. It could be used for the characterization of terminal D-galactoside units in several polymers. It may also be useful in the determination of lactose.

Biochem/physiol Actions

Galactose oxidase catalyzes the coversion of D-galactose to D-galacto-hexodialdose.
2-Deoxy-D-galactose, lactose, melibiose, raffinose and stachyose react with galactose oxidase in the peroxidase:o-tolidine system.
Essentially no oxidation of D-glucose, L-galactose, L-arabinose or D-glucuronate has been observed.
Galactose oxidase has several applications in bioanalytics and histology. This free radical enzyme possess high substrate specificity.

Unit Definition

One unit will produce a ΔA425 of 1.0 per min at pH 6.0 at 25 °C, in a peroxidase and o-tolidine system. Reaction volume = 3.4 mL. Light path = 1 cm.

Physical form

Lyophilized, contains buffer salts and stabilizer

Preparation Note

Chromatographically purified

inhibitor

Product No.
Description
Pricing

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Precautionary Statements

Hazard Classifications

Resp. Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Development of an immunoassay for larch arabinogalactan and its use in the detection of larch arabinogalactan in rat blood
Groman E V and Gou D
Carbohydrate Research, 301(1-2), 69-76 (1997)
Sarah E Deacon et al.
Chembiochem : a European journal of chemical biology, 12(4), 593-601 (2011-01-26)
Galactose oxidase (GO) displays broad primary alcohol substrate specificity and so offers potential for engineering new substrate specificity by directed evolution. Producing variant libraries of sufficient complexity ideally requires expression of functional protein in a host such as Escherichia coli.
Oliver Spadiut et al.
Microbial cell factories, 9, 68-68 (2010-09-15)
The microbes Escherichia coli and Pichia pastoris are convenient prokaryotic and eukaryotic hosts, respectively, for the recombinant production of proteins at laboratory scales. A comparative study was performed to evaluate a range of constructs and process parameters for the heterologous
Rapid and sensitive galactose oxidase-peroxidase biosensor for galactose detection with prolonged stability
Tkac J, et al.
BioTechnology: An Indian Journal, 13(12), 931-936 (1999)
M J McPherson et al.
The Journal of biological chemistry, 267(12), 8146-8152 (1992-04-25)
The gaoA gene, encoding the secreted copper-containing enzyme galactose oxidase, has been isolated from the Deuteromycete fungus Dactylium dendroides. Degenerate oligonucleotide primers were designed from amino acid sequence data for use in the polymerase chain reaction. A 1.4-kilobase DNA fragment

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