Biochemical characterization of a novel C-terminally truncated ß-galactosidase from Paenibacillus antarcticus with high transglycosylation activity.
J Dairy Sci
; 2024 Jul 12.
Article
em En
| MEDLINE
| ID: mdl-39004139
ABSTRACT
The transgalactosylase activity of ß-galactosidases offers a convenient and promising strategy for conversion of lactose into high-value oligosaccharides, such as galacto-oligosaccharides (GOS) and human milk oligosaccharides (HMOs). In this study, we cloned and biochemically characterized a novel C-terminally truncated ß-galactosidase (PaBgal2A-D) from Paenibacillus antarcticus with high transglycosylation activity. PaBgal2A-D is a member of glycoside hydrolase (GH) family 2. The optimal pH and temperature of PaBgal2A-D were determined to be pH 6.5 and 50°C, respectively. It was relatively stable within pH 5.0-8.0 and up to 50°C. PaBgal2A-D showed high transglycosylation activity for GOS synthesis, and the maximum yield of 50.8% (wt/wt) was obtained in 2 h. Moreover, PaBgal2A-D could synthesize lacto-N-neotetraose (LNnT) using lactose and lacto-N-triose II (LNT2), with a conversion rate of 16.4%. This study demonstrated that PaBgal2A-D could be a promising tool to prepare GOS and LNnT.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Dairy Sci
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
China