发明名称 |
IMPROVED B-FRUCTOFURANOSIDASE |
摘要 |
[Problem] To provide an improved β-fructofuranosidase which enables the production of kestose with high efficiency while reducing the amount of a by-product such as nystose produced during the production of kestose.;[Solution] An improved β-fructofuranosidase comprising an amino acid sequence which is produced by introducing an amino acid mutation into an amino acid sequence for a β-fructofuranosidase having 60% or higher identity to the amino acid sequence for wild-type β-fructofuranosidase which is represented by SEQ ID NO: 2, wherein the amino acid mutation is such a mutation that, when amino acid sequence alignment is performed, a histidine (H) residue corresponding to the position 395 as numbered from the N-terminal of the amino acid sequence for the wild-type β fructofuranosidase which is represented by SEQ ID NO: 2 can be replaced by an arginine (R) residue or a lysine (K) residue. |
申请公布号 |
US2016319263(A1) |
申请公布日期 |
2016.11.03 |
申请号 |
US201415107500 |
申请日期 |
2014.12.26 |
申请人 |
B FOOD SCIENCE CO., LTD. ;MICROBIOPHARM JAPAN CO., LTD. |
发明人 |
TOCHIO Takumi;NAKAMURA Saki;YAHARA Misa;FUJII Tadashi;TAMURA Keisuke |
分类号 |
C12N9/26;C12P19/14 |
主分类号 |
C12N9/26 |
代理机构 |
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代理人 |
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主权项 |
1. An improved β-fructofuranosidase comprising an amino acid sequence having 60% or higher identity to an amino acid sequence of wild-type β-fructofuranosidase represented by SEQ ID NO: 2, wherein the amino acid sequence of the improved β-fructofuranosidase contains an amino acid mutation that replaces histidine (H) corresponding to position 395 counted from the N terminus of the amino acid sequence of wild-type β-fructofuranosidase represented by SEQ ID NO: 2 in alignment with arginine (R) or lysine (K). |
地址 |
Chita-shi JP |