Beta-galactosidase with transgalactosylating activity

Details Beta-galactosidase with transgalactosylating activity Beta-galactosidase with transgalactosylating activity

C - Chemistry, Metallurgy

12

N

C12N 5/10 (2006.01) C12N 9/38 (2006.01) C12N 15/63 (2006.01)

Patent

CA 2645783

The present invention concerns a new .beta.-galactosidase with transgalactosylating activity isolated from Bifidobacterium bifidum. The .beta.-galactosidase is capable of converting lactose to a mixture of galactooligosaccharides which are .beta.-linked and unexpectedly produces the .alpha.-linked disaccharide galactobiose. The mixture may be incorporated into numerous food products or animal feeds for improving gut health by promoting the growth of bifidobacteria in the gut, and repressing the growth of the pathogenic microflora.

La présente invention concerne une nouvelle .beta.-galactosidase dotée d'une activité de transgalactosylation, isolée de Bifidobacterium bifidum. Cette .beta.-galactosidase est capable de convertir le lactose en un mélange d'oligosaccharides comportant une liaison .beta. et produit, de manière inattendue, le disaccharide galactobiose à liaison .alpha.. Ce mélange favorisant la croissance des bifidobactéries dans l'intestin et inhibant le développement de la microflore pathogène peut être incorporé dans de nombreux produits alimentaires ou aliments pour animaux afin d'améliorer le bien-être intestinal.

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