SUCROSE SYNTHETASE AND USE THEREOF
    1.
    发明公开

    公开(公告)号:EP4379050A1

    公开(公告)日:2024-06-05

    申请号:EP22848384.8

    申请日:2022-07-21

    摘要: Provided are a sucrose synthetase and the use thereof. Compared with SEQ ID NO: 11, an amino acid sequence of the sucrose synthetase contains differences in amino acid residues selected from one or more of the following residue positions: an amino acid at position 36 being V, an amino acid at position 43 being E, an amino acid at position 179 being A, an amino acid at position 395 being R, an amino acid at position 447 being P, an amino acid at position 455 being L, and an amino acid at position 654 being R; and the sucrose synthetase has an activity not lower than that of a sucrose synthetase having an amino acid sequence as shown in SEQ ID NO: 11. By means of catalyzing the synthesis of rebaudioside A, rebaudioside D or rebaudioside M by using a glucosyltransferase and the sucrose synthetase in a combined manner, a cascade reaction is achieved, thereby providing a variety of possibilities for the selection of raw materials.

    STEVIOL GLYCOSIDE TRANSPORT
    6.
    发明公开

    公开(公告)号:EP3334819A1

    公开(公告)日:2018-06-20

    申请号:EP16756990.4

    申请日:2016-08-15

    摘要: A recombinant host capable of producing a steviol glycoside which overexpresses a polypeptide which mediates steviol glycoside transport and which polypeptide comprises the amino acid sequence set forth in SEQ ID NO: 35 or SEQ ID NO: 38 or an amino acid sequence having at least about 50% sequence identity to either thereto. A recombinant host capable of producing a steviol glycoside which has been modified, preferably in its genome, to result in a deficiency in the production of a polypeptide which mediates steviol glycoside transport and which polypeptide comprises the amino acid sequence set forth in SEQ ID NO: 35 or SEQ ID NO: 38 or an amino acid sequence having at least about 50% sequence identity to either thereto.

    STEVIOL GLYCOSIDE PRODUCTION
    9.
    发明公开
    STEVIOL GLYCOSIDE PRODUCTION 审中-公开
    STEVIOL GLYCOSIDE生产

    公开(公告)号:EP3204506A1

    公开(公告)日:2017-08-16

    申请号:EP15778289.7

    申请日:2015-10-08

    IPC分类号: C12P19/18 C12N15/67

    摘要: a. contacting said composition comprising steviol glycosides with a recombinant microorganism, a cell free extract derived from such a microorganism or an enzyme preparation derived from either thereof; and b. thereby to increase the degree of glycosylation of the composition comprising steviol glycosides, wherein the recombinant microorganism comprises one or more nucleotide sequence(s) encoding: a polypeptide having ent-copalyl pyrophosphate synthase activity;a polypeptide having ent-Kaurene synthase activity; a polypeptide having ent-Kaurene oxidase activity; a polypeptide having kaurenoic acid 13-hydroxylase activity; and one or more polypeptides having UDP-glucosyltransferase activity whereby expression of the nucleotide sequence(s) confer(s) on the microorganism the ability to produce at least one steviol glycoside. The present invention also relates to a composition comprising steviol glycosides obtainable by such a method.

    摘要翻译: 本发明涉及用于提高包含甜菊醇糖苷的组合物的糖基化程度的方法,该方法包括:a。 使所述包含甜菊醇糖苷的组合物与重组微生物,源自该微生物的无细胞提取物或源自其任一的酶制剂接触; 和b。 从而增加包含甜菊醇糖苷的组合物的糖基化程度,其中所述重组微生物包含一种或多种编码以下核苷酸序列的核苷酸序列:具有对焦酰基焦磷酸合酶活性的多肽;具有内 - 胡安烯合酶活性的多肽; 具有ent-Kaurene氧化酶活性的多肽; 具有kaurenoic酸13-羟化酶活性的多肽; 和一种或多种具有UDP-葡糖基转移酶活性的多肽,由此所述核苷酸序列的表达赋予所述微生物产生至少一种甜菊醇糖苷的能力。 本发明还涉及包含通过这种方法可获得的甜菊醇糖苷的组合物。