G7400
Galactose Oxidase from Dactylium dendroides
lyophilized powder, ≥3,000 units/g solid
Synonym(s):
D-Galactose:oxygen 6-oxidoreductase
biological source
fungus (Dactylium dendroides)
Quality Level
form
lyophilized powder
specific activity
≥3,000 units/g solid
storage temp.
−20°C
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General description
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 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.
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.
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.
The specificity for galactose and other sugars is similar to that described by Avigad.
Other Notes
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.
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
Regulatory Information
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Ana Mijovilovich et al.
Physical chemistry chemical physics : PCCP, 13(13), 5600-5604 (2011-02-02)
X-ray Emission Spectroscopy (XES) crossover peaks were shown to be sensitive to the protonation state of solvent molecules in the Zn protein carbonic anhydrase and its model compounds. Here we extend such studies to galactose oxidase models i.e. Cu(ii) open
I H El-Sayed et al.
European review for medical and pharmacological sciences, 15(1), 91-97 (2011-03-09)
Colorectal cancer (CRC) is more common in developed countries and is the third most common cancer among both men and women. CRC provides an attractive model of tumour biology with normal mucosa to adenoma to carcinoma sequence. The TF-antigen (Thomsen-Friedenreich)
Glycoprotein labeling using engineered variants of galactose oxidase obtained by directed evolution.
Julie B Rannes et al.
Journal of the American Chemical Society, 133(22), 8436-8439 (2011-04-30)
A directed evolution approach has been used for the generation of variants of galactose oxidase (GOase) that can selectively oxidize glycans on glycoproteins. The aldehyde function introduced on the glycans D-mannose (Man) and D-N-acetyl glucosamine (GlcNAc) by the enzyme variants
Björn Steinmann et al.
Applied and environmental microbiology, 76(16), 5563-5569 (2010-06-29)
A novel strategy for in vivo immobilization of enzymes on the surfaces of inclusion bodies has been established. It relies on expression in Escherichia coli of the polyhydroxybutyrate synthase PhaC from Cupriavidus necator, which carries at its amino terminus an
V C Sheppard et al.
Applied and environmental microbiology, 78(1), 211-218 (2011-11-08)
Living organisms are adept in forming inorganic materials (biominerals) with unique structures and properties that exceed the capabilities of engineered materials. Biomimetic materials syntheses are being developed that aim at replicating the advantageous properties of biominerals in vitro and endow
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