Enzyme isolated from a Bifidobacterium

    公开(公告)号:US06555348B2

    公开(公告)日:2003-04-29

    申请号:US09865621

    申请日:2001-05-29

    IPC分类号: C12P1944

    摘要: The present invention concerns a new &bgr;-galactosidase with transgalactosylating activity isolated from Bifidobacterium bifidum and a truncated enzyme where the C-terminal end of the &bgr;-galactosidase protein has been deleted, resulting in an enzyme with a higher transgalactosylating activity than hydrolase activity. When lactose is used as a substrate, galacto-oligosaccharides are products of the transgalactosylase activity. Galacto-oligosaccharides enhance growth of health-promoting Bifidobacterium that may be used in a number of applications in the dairy industry.