Reaction participants Show >> << Hide
- Name help_outline (S)-2,3-epoxysqualene Identifier CHEBI:15441 Charge 0 Formula C30H50O InChIKeyhelp_outline QYIMSPSDBYKPPY-RSKUXYSASA-N SMILEShelp_outline CC(C)=CCC\C(C)=C\CC\C(C)=C\CC\C=C(/C)CC\C=C(/C)CC[C@@H]1OC1(C)C 2D coordinates Mol file for the small molecule Search links Involved in 29 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline cucurbitadienol Identifier CHEBI:62456 Charge 0 Formula C30H50O InChIKeyhelp_outline WSPRAEIJBDUDRX-FBJXRMALSA-N SMILEShelp_outline [H][C@@]1(CC[C@@]2(C)[C@]3([H])CC=C4[C@@]([H])(CC[C@H](O)C4(C)C)[C@]3(C)CC[C@]12C)[C@H](C)CCC=C(C)C 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:30999 | RHEA:31000 | RHEA:31001 | RHEA:31002 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
|
|||
| EC numbers help_outline | ||||
| KEGG help_outline |
Publications
-
Functional characterization of cucurbitadienol synthase and triterpene glycosyltransferase involved in biosynthesis of mogrosides from Siraitia grosvenorii.
Dai L., Liu C., Zhu Y., Zhang J., Men Y., Zeng Y., Sun Y.
Mogrosides, the major bioactive components isolated from the fruits of Siraitia grosvenorii, are a family of cucurbitane-type tetracyclic triterpenoid saponins that are used worldwide as high-potency sweeteners and possess a variety of notable pharmacological activities. Mogrosides are synthesized ... >> More
Mogrosides, the major bioactive components isolated from the fruits of Siraitia grosvenorii, are a family of cucurbitane-type tetracyclic triterpenoid saponins that are used worldwide as high-potency sweeteners and possess a variety of notable pharmacological activities. Mogrosides are synthesized from 2,3-oxidosqualene via a series of reactions catalyzed by cucurbitadienol synthase (CbQ), Cyt P450s (P450s) and UDP glycosyltransferases (UGTs) in vivo. However, the relevant genes have not been characterized to date. In this study, we report successful identification of SgCbQ and UGT74AC1, which were previously predicted via RNA-sequencing (RNA-seq) and digital gene expression (DGE) profile analysis of the fruits of S. grosvenorii. SgCbQ was functionally characterized by expression in the lanosterol synthase-deficient yeast strain GIL77 and was found to accumulate cucurbitadienol as the sole product. UGT74AC1 was heterologously expressed in Escherichia coli as a His-tag protein and it showed specificity for mogrol by transfer of a glucose moiety to the C-3 hydroxyl to form mogroside IE by in vitro enzymatic activity assays. This study reports the identification of CbQ and glycosyltransferase from S. grosvenorii for the first time. The results also suggest that RNA-seq, combined with DGE profile analysis, is a promising approach for discovery of candidate genes involved in biosynthesis of triterpene saponins. << Less
Plant Cell Physiol. 56:1172-1182(2015) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
Comments
Published in: "Cucurbitadienol synthase, the first committed enzyme for cucurbitacin biosynthesis, is a distinct enzyme from cycloartenol synthase for phytosterol biosynthesis." Shibuya M., Adachi S., Ebizuka Y. Tetrahedron 60:6995-7003(2003)