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10065

Sigma-Aldrich

α-Amylase from Aspergillus oryzae

powder, ~30 U/mg

Synonyme(s) :

1,4-α-D-Glucane-glucanohydrolase

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About This Item

Numéro de classification (Commission des enzymes):
Numéro CE :
Numéro MDL:
Code UNSPSC :
12352204
eCl@ss :
32160410
Nomenclature NACRES :
NA.54

Forme

powder

Activité spécifique

~30 U/mg

Poids mol.

Mr ~51000

Température de stockage

2-8°C

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Description générale

Microbial amylases are exoenzymes and are used in several industrial applications, such as production of bread, maltose syrups, and fermentation of soya sauce, miso etc. α-Amylase isolated from Aspergillus oryzae has been found to have molecular weights of 51kDa (sedimentation and diffusion) and 49kDa (gel filtration).

Application

α-Amylase has been used:
  • as a control enzyme in agar plate-based and carboxymethylcellulose-based clearing assays to screen cellulase activity
  • for the hydrolysis of starch to explore the the role of wheat starch in frozen dough
  • to inhibit Staphylococcus aureus biofilms

Actions biochimiques/physiologiques

Aspergillus oryzae α-amylase (Ao α-amylase) enzyme catalyzes the hydrolysis of the α-1,4 glycosidic bonds in soluble starches and related subsrates. These substrates are broken down to release short oligosaccharides and α-limit dextrins.

Définition de l'unité

1 U corresponds to the amount of enzyme which liberates 1 μmol maltose per minute at pH 6.0 and 25°C (starch acc. to Zulkowsky, Cat. No. 85642, as substrate).

Autres remarques

For the determination of fats in food; Application in (selective) hydrolysis/condensation of glycosidic bonds.

Pictogrammes

Health hazardExclamation mark

Mention d'avertissement

Danger

Mentions de danger

Classification des risques

Acute Tox. 4 Oral - 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

dust mask type N95 (US), Eyeshields, Faceshields, Gloves


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Consulter la Bibliothèque de documents

Han Tao et al.
Food chemistry, 265, 18-22 (2018-06-10)
Properties of starches isolated from soft and hard wheat dough after freezing/thawing (F/T) treatment were investigated. Significance of results was observed between isolated hard wheat starch (HWS) and soft wheat starch (SWS), but both cultivars showed an increase in the
Han Tao et al.
Food chemistry, 190, 588-593 (2015-07-28)
The wheat dough was subjected to freezing/thawing treatment for 0, 3, 7, and 10 cycles and fractionated into non-gluten proteins and starch. High-performance liquid chromatography revealed changes in molecular mass distribution occurred for the extracted non-gluten proteins. As for the
Takagi, T., et al.
The Enzymes, 5, 235- 271 (1971)
K. Fujita et al.
Bulletin of the Chemical Society of Japan, 62, 3150-3150 (1989)
P C Sehnke et al.
Proceedings of the National Academy of Sciences of the United States of America, 98(2), 765-770 (2001-01-10)
In higher plants the production of starch is orchestrated by chloroplast-localized biosynthetic enzymes, namely starch synthases, ADP-glucose pyrophosphorylase, and starch branching and debranching enzymes. Diurnal regulation of these enzymes, as well as starch-degrading enzymes, influences both the levels and composition

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