| 摘要 |
It is intended to provide proteins having an activity of digesting saponin, more specifically, proteins capable of digesting a glycoside having soyasapogenol B as an aglycone and thus producing soyasapogenol B; polynucleotides encoding the above proteins; and a process whereby soyasapogenol B can be produced in a large amount using the same. Namely, proteins (a), (b) and (c) as defined below: (a) a protein comprising an amino acid sequence selected from the group consisting of the amino acid sequences represented by SEQ ID NOS:2, 4 and 6; (b) a protein comprising an amino acid sequence having at least a 50% homology with a protein comprising an amino acid sequence as defined in the above (a) and having an activity of digesting saponin; and (c) a protein comprising an amino acid sequence derived from an amino acid sequence as defined in the above (a) by deletion, substitution, insertion or addition of one or more amino acid residues and having an activity of digesting saponin. |
