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A MODIFIED B-FRUCTOFURANOSIDASE FOR FRUCTOOLIGOSACCHARIDE PRODUCTION
A MODIFIED B-FRUCTOFURANOSIDASE FOR FRUCTOOLIGOSACCHARIDE PRODUCTION
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机译:用于果糖寡糖生产的改良B-果糖呋喃糖苷酶
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摘要
The invention provides variants of the Aspergillus japonicus β-fructofuranosidase enzyme which have been modified so as to improve synthesis of inulin-type fructooligosaccharides (FOS) from sucrose. One or more substitutions may be made to the parent β-fructofuranosidase polypeptide at amino acid positions 121, 159, 302 and/or 471 of the mature peptide (SEQ ID NO: 3), corresponding to crystal positions 140, 178, 321 and 490. A method of synthesizing FOS using the variants is also claimed.
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机译:本发明提供了日本曲霉β-果糖呋喃糖苷酶的变体,其已被修饰以改善由蔗糖合成菊粉型低聚果糖(FOS)。可以在成熟肽(SEQ ID NO:3)的氨基酸位置121、159、302和/或471处,对应于晶体位置140、178、321和490,对亲本β-果糖呋喃糖苷酶多肽进行一个或多个取代。还要求保护一种使用变体合成FOS的方法。
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