Probing Labdane-Related Diterpenoid Biosynthesis in the Fungal Genus <i>Aspergillus</i>
作者:Meimei Xu、Matthew L. Hillwig、Mollie S. Tiernan、Reuben J. Peters
DOI:10.1021/acs.jnatprod.6b00764
日期:2017.2.24
biosynthesis. Notably, fungi contain a number of cyclases characteristic of labdane-related diterpenoid metabolism, which have not been much explored. These also are often found near cytochrome P450 (CYP) mono-oxygenases that presumably further decorate the ensuing diterpene, suggesting that these fungi might produce more elaborate diterpenoids. To probe the functional diversity of such biosynthetic capacity
Method for increasing glycosylation of a composition comprising steviol glycosides
申请人:DSM IP ASSETS B.V.
公开号:US10472661B2
公开(公告)日:2019-11-12
The present invention relates to a method for increasing the degree of glycosylation of a composition comprising steviol glycosides, which method comprises: 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.
本发明涉及一种提高包含甜菊醇苷的组合物糖基化程度的方法,该方法包括: a. 将所述包含甜菊醇苷的组合物与重组微生物、衍生自重组微生物的无细胞提取物或衍生自二者之一的酶制剂接触;以及 b. 将所述重组微生物与衍生自重组微生物的无细胞提取物或衍生自二者之一的酶制剂接触;以及 c. 将所述重组微生物与衍生自重组微生物的无细胞提取物或衍生自二者之一的酶制剂接触。从而提高包含甜菊糖苷的组合物的糖基化程度,其中所述重组微生物包含一个或多个核苷酸序列,其编码为具有焦磷酸ent-copalyl合成酶活性的多肽;具有ent-Kaurene合成酶活性的多肽;具有ent-Kaurene氧化酶活性的多肽;具有kaurenoic acid 13-羟化酶活性的多肽;以及具有UDP-葡萄糖基转移酶活性的一个或多个多肽,其中核苷酸序列的表达赋予微生物产生至少一种甜菊糖苷的能力。本发明还涉及一种包含可通过这种方法获得的甜菊醇糖苷的组合物。
Recovery of steviol glycosides
申请人:DSM IP ASSETS B.V.
公开号:US10689410B2
公开(公告)日:2020-06-23
The present invention relates a process for the recovery of one or more steviol glycosides from a steviol glycoside-containing fermentation broth, which method comprises (a) providing a fermentation broth comprising one or more steviol glycosides and one or more non-steviol glycoside components; (b) separating the liquid phase of the broth from the solid phase of the broth; (c) providing an adsorbent resin; (d) contacting the liquid phase of the broth with the adsorbent resin in order to separate at least a portion of the one or more steviol glycosides from the non-steviol glycoside components, thereby to recover one or more steviol glycosides from the fermentation broth containing one or more steviol glycosides. The invention also relates to a purified steviol glycoside composition prepared using such a process.
The present invention relates to a recombinant microorganism comprising 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; and a polypeptide having kaurenoic acid 13-hydroxylase activity, whereby expression of the nucleotide sequence(s) confer(s) on the microorganism the ability to produce at least steviol. The recombinant microorganism may also be capable of expressing one or more UDP-glucosyltransferases such that the microorganism is capable of producing one or more steviol glycosides.
The present invention relates to a recombinant host comprising a recombinant nucleic acid sequence encoding a polypeptide having at least about: a. 85% identity to the amino acid sequence set forth in SEQ ID NO: 1; b. 85% identity to the amino acid sequence set forth in SEQ ID NO: 3; c. 85% identity to the amino acid sequence set forth in SEQ ID NO: 6; d. 85% identity to the amino acid sequence set forth in SEQ ID NO: 9; e. 85% identity to the amino acid sequence set forth in SEQ ID NO: 11; f. 85% identity to the amino acid sequence set forth in SEQ ID NO: 14; g. 85% identity to the amino acid sequence set forth in SEQ ID NO: 17; h. 85% identity to the amino acid sequence set forth in SEQ ID NO: 20; i. 85% identity to the amino acid sequence set forth in SEQ ID NO: 22; or j. 85% identity to the amino acid sequence set forth in SEQ ID NO: 25.
本发明涉及一种重组宿主,其包含编码多肽的重组核酸序列,该多肽具有至少约: a. 与 SEQ ID NO: 1 所述氨基酸序列 85% 的同一性; b. 与 SEQ ID NO: 3 所述氨基酸序列 85% 的同一性; c. 与 SEQ ID NO: 6 所述氨基酸序列 85% 的同一性; d. 与 SEQ ID NO: 9 所述氨基酸序列 85% 的同一性; e. 与 SEQ ID NO: 11 所述氨基酸序列 85% 的同一性; f. 与 SEQ ID NO: 14 所述氨基酸序列 85% 的同一性; g. 与 SEQ ID NO: 15 所述氨基酸序列 85% 的同一性; h. 与 SEQ ID NO: 16 所述氨基酸序列 85% 的同一性。与 SEQ ID NO: 11 所列氨基酸序列的 85%同一性; f. 与 SEQ ID NO: 14 所列氨基酸序列的 85%同一性; g. 与 SEQ ID NO: 17 所列氨基酸序列的 85%同一性; h. 与 SEQ ID NO: 20 所列氨基酸序列的 85%同一性; i. 与 SEQ ID NO: 22 所列氨基酸序列的 85%同一性;或 j. 与 SEQ ID NO: 25 所列氨基酸序列的 85%同一性。