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Key Documents

G5160

Sigma-Aldrich

β-Galactosidase from Aspergillus oryzae

≥8.0 units/mg solid

Synonyme(s) :

β-D-Galactoside galactohydrolase, Lactase from Aspergillus oryzae

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About This Item

Numéro CAS:
Numéro de classification (Commission des enzymes):
Numéro CE :
Numéro MDL:
Code UNSPSC :
12352204
Nomenclature NACRES :
NA.54

Forme

solid

Niveau de qualité

Activité spécifique

≥8.0 units/mg solid

Contient

dextrin as extender

Température de stockage

−20°C

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Description générale

β-Galactosidase is a member of the glycoside hydrolase clan A (GH-A) family. It is widely present in microorganisms, which includes both prokaryotes and eukaryotes.

Application

β-Galactosidase from Aspergillus oryzae has been used:
  • in in vitro nuclear magnet resonance (NMR)
  • as a standard in the β-galactosidase assay to determine the concentration of cell-associated β-galactosidase
  • to modify sugar residues on the surface of the mutant slime cells to study the adhesive properties
  • for enzymatic hydrolysis of lactose
  • for reversed-phase (RP) adsorption
  • in the hydrolysis of whey lactose

Actions biochimiques/physiologiques

β-Galactosidase acts on the terminal β-D-galactosyl moieties of disaccharides, glycoconjugates, and polysaccharides. It is useful in mediating transglycosylation reactions such as the synthesis of galactooligosaccharides (GOS). β-Galactosidases might be used for glycobiological and biotechnological applications.
β-galactosidase cleaves lactose into its monosaccharide components, glucose and galactose. It also catalyses the transglycosylation of glucose into allolactose, the inducer of β-galactosidase, in a feedback loop.

Définition de l'unité

1 U hydrolysiert 1.0 μmol o-Nitrophenyl β-D-Galactosid zu o-Nitrophenol und D-Galactose pro Minute beim angegebenen pH- und Temperatur-Wert, falls nicht anders erwähnt.

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)


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Consulter la Bibliothèque de documents

Hydrolysis of whey lactose by immobilized β-Galactosidase
Marcela Panaro Mariotti; Hideko Yamanaka; Angela Regina Araujo; Henrique Celso Trevisan
Brazilian Archives of Biology and Technology, 51 (2008)
Jian-Xin Yu et al.
NMR in biomedicine, 21(7), 704-712 (2008-02-22)
Gene therapy has emerged as a promising strategy for treatment of various diseases. However, widespread implementation is hampered by difficulties in assessing the success of transfection in the target tissue and the longevity of gene expression. Thus, there is increasing
Modular process for the flexible synthesis of magnetic beads-Process and product validation
Birgit Hickstein1, and Urs Alexander Peuker
Journal of Applied Polymer Science, 112, 2366-2373 (2009)
C M Seubert et al.
Cancer gene therapy, 18(1), 42-52 (2010-09-11)
Breast cancer is the most common cause of cancer-related death worldwide, thus remaining a crucial health problem among women despite advances in conventional therapy. Therefore, new alternative strategies are needed for effective diagnosis and treatment. One approach is the use
Martin Dragosits et al.
Applied microbiology and biotechnology, 98(8), 3553-3567 (2013-09-17)
Galactosidases are widespread enzymes that are used for manifold applications, including production of prebiotics, biosynthesis of different transgalactosylated products, improving lactose tolerance and in various analytical approaches. The nature of these applications often require galactosidases to be present in a

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