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 synthesising FOS using the variants is also claimed.
摘要翻译:本发明提供日本曲霉β-呋喃果糖苷酶的变体,其已经被改性以改善从蔗糖合成菊粉型低聚果糖(FOS)。 对于成熟肽(SEQ ID NO:3)的氨基酸位置(121,159,302和/或471),对应于晶体位置(140,178,140),可以对母体β-呋喃果糖苷酶多肽进行一个或多个取代, 321和490)。 还要求使用这些变体合成FOS的方法。