X4500
Xanthine Oxidase from bovine milk
Grade III, ammonium sulfate suspension, ≥0.8 units/mg protein
Synonyme(s) :
Schardinger enzyme, XnOx, hypoxanthine oxidase, XOD, Xanthine:oxygen oxidoreductase
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About This Item
Numéro CAS:
Numéro de classification (Commission des enzymes):
1.17.3.2.
Numéro CE :
Numéro MDL:
Code UNSPSC :
12352204
Nomenclature NACRES :
NA.54
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Source biologique
bovine milk
Niveau de qualité
Type
Grade III
Forme
ammonium sulfate suspension
Activité spécifique
≥0.8 units/mg protein
Technique(s)
inhibition assay: suitable
Couleur
faint brown to dark brown
Numéro d'accès UniProt
Activité étrangère
uricase ≤0.1%
Température de stockage
2-8°C
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Description générale
Research area: Cell Cycle
Xanthine Oxidase (XO) belongs to the class of complex metalloflavoproteins. It is produced by oxidation of sulfhydryl residues or by proteolysis of xanthine dehydrogenase (XDH). XO is characterized with two flavin molecules (FAD), two molybdenum atoms, and eight iron atoms bound per enzymatic unit.
Xanthine Oxidase (XO) belongs to the class of complex metalloflavoproteins. It is produced by oxidation of sulfhydryl residues or by proteolysis of xanthine dehydrogenase (XDH). XO is characterized with two flavin molecules (FAD), two molybdenum atoms, and eight iron atoms bound per enzymatic unit.
enthält auch proteolytische Aktivität
Application
Xanthine Oxidase from bovine milk has been used:
- as a source for superoxide generation
- for the degradation of hypoxanthine
- for the detection of reactive oxygen species (ROS) in lipid model by electron spin resonance (ESR) spin trap method
- as a constituent of assay mixture in xanthine oxidase inhibition assay
Actions biochimiques/physiologiques
Xanthine Oxidase (XO)catalyzes the hydroxylation of hypoxanthine to xanthine and xanthine to uric acid. Xanthine oxidase activity is inhibited by folic acid. [7] and various other inhibitors including 3,4-Dihydroxy-5-nitrobenzaldehyde (DHNB), febuxostat and allopurinol. XO and xanthine dehydrogenase (XDH) plays a vital role in the last two steps in the formation of urate. Elevated levels of XO has been observed in the serum of chronic liver disease patients. Therefore, XO can be used as a biomarker for the detection of liver disease.
Xanthine oxidase activity is inhibited by folic acid.
Xanthine oxidase is a molybdenum-containing enzyme that is found in the cytosol, and may be strongly inhibited by flavonoids. It plays a vital role in the metabolism of some drugs, as well as purines and pyrimidines. It is also known to be a biological source of reactive oxygen species.
Définition de l'unité
One unit will convert 1.0 μmole of xanthine to uric acid per min at pH 7.5 at 25 °C. Approx. 50% of the activity is obtained with hypoxanthine as substrate.
Forme physique
Suspension in 2.3 M (NH4)2SO4, 10 mM sodium phosphate buffer, pH 7.8, containing 1 mM EDTA and 1 mM sodium salicylate
Notes préparatoires
Chromatographically purified
Stockage et stabilité
Tightly closed. Dry. Keep locked up or in an area accessible only to qualified or authorized
persons
persons
Remarque sur l'analyse
Protein determined by biuret
Substrat
Réf. du produit
Description
Tarif
Mention d'avertissement
Danger
Mentions de danger
Conseils de prudence
Classification des risques
Resp. Sens. 1
Code de la classe de stockage
11 - Combustible Solids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Équipement de protection individuelle
Eyeshields, Gloves, type N95 (US)
Certificats d'analyse (COA)
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Xanthine oxidase (XO), a versatile metalloflavoprotein enzyme, catalyzes the oxidative hydroxylation of hypoxanthine and xanthine to uric acid in purine catabolism while simultaneously producing reactive oxygen species. Both lead to the gout-causing hyperuricemia and oxidative damage of the tissues where
Articles
Instructions for working with enzymes supplied as ammonium sulfate suspensions
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