Abstract
β-Galactosidases have a wide application in the food and pharmaceutical industries. Recently, β-galactosidase was also found to participate in agar degradation. In this study, the second reported agarolytic β-galactosidase was found in the marine bacterium Agarivorans gilvus WH0801 and characterized. The β-galactosidase named AgWH2A (83kDa) exhibited good activities under optimal hydrolysis conditions of pH8.0 and 40°C. AgWH2A could cleave the first D-galactose of agarooligosaccharides from its nonreducing end to produce neoagarooligosaccharides, but could not act on the neoagarooligosaccharides. AgWH2A has great potential in the comprehensive utilization of marine red algae.
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