Transgalactosylation and hydrolytic activities of commercial preparations of β-galactosidase for the synthesis of prebiotic carbohydrates

Cecilia Guerrero, Carlos Vera, Raúl Conejeros, Andrés Illanes

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

73 Citas (Scopus)

Resumen

oryzae and B. circulans exhibited high transgalactosylation activity. β-Galactosidases exhibit both hydrolytic and transgalactosylation activities; the former has been used traditionally for the production of delactosed milk and dairies, while the latter is being increasingly used for the synthesis of lactose-derived oligosaccharides: balance between both activities was highly dependent on the enzyme origin: β-galactosidases from Aspegillus oryzae and Bacillus circulans exhibited high transgalactosylation activity, while those from one from Kluyveromyces exhibited high hydrolytic activity but quite low transgalactosylation activity. Also the affinity for the donors (lactose or lactulose) and the acceptors (lactose, lactulose or fructose) of transgalactosylated galactose was dependent on the enzyme origin, as reflected by the Michaelis constants obtained in the synthesis of galacto-oligosaccharides, fructosyl-galacto-oligosaccharides and lactulose. Finally, the balance between transgalactosylation and hydrolytic activities of β-galactosidases could be tuned by changing the concentration of galactose donor.

Idioma originalInglés
Páginas (desde-hasta)9-17
Número de páginas9
PublicaciónEnzyme and Microbial Technology
Volumen70
DOI
EstadoPublicada - 1 mar. 2015

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