Enzymes
| UniProtKB help_outline | 2 proteins |
| Enzyme class help_outline |
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- Name help_outline (20S)-protopanaxadiol Identifier CHEBI:75950 (CAS: 30636-90-9) help_outline Charge 0 Formula C30H52O3 InChIKeyhelp_outline PYXFVCFISTUSOO-HKUCOEKDSA-N SMILEShelp_outline CC(C)=CCC[C@](C)(O)[C@H]1CC[C@]2(C)[C@@H]1[C@H](O)C[C@@H]1[C@@]3(C)CC[C@H](O)C(C)(C)[C@@H]3CC[C@@]21C 2D coordinates Mol file for the small molecule Search links Involved in 5 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP-α-D-glucose Identifier CHEBI:58885 (Beilstein: 3827329) help_outline Charge -2 Formula C15H22N2O17P2 InChIKeyhelp_outline HSCJRCZFDFQWRP-JZMIEXBBSA-L SMILEShelp_outline OC[C@H]1O[C@H](OP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2ccc(=O)[nH]c2=O)[C@H](O)[C@@H](O)[C@@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 223 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (20S)-ginsenoside Rh2 Identifier CHEBI:77147 (CAS: 78214-33-2) help_outline Charge 0 Formula C36H62O8 InChIKeyhelp_outline CKUVNOCSBYYHIS-IRFFNABBSA-N SMILEShelp_outline CC(C)=CCC[C@](C)(O)[C@H]1CC[C@]2(C)[C@@H]1[C@H](O)C[C@@H]1[C@@]3(C)CC[C@H](O[C@@H]4O[C@H](CO)[C@@H](O)[C@H](O)[C@H]4O)C(C)(C)[C@@H]3CC[C@@]21C 2D coordinates Mol file for the small molecule Search links Involved in 4 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,176 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline UDP Identifier CHEBI:58223 Charge -3 Formula C9H11N2O12P2 InChIKeyhelp_outline XCCTYIAWTASOJW-XVFCMESISA-K SMILEShelp_outline O[C@@H]1[C@@H](COP([O-])(=O)OP([O-])([O-])=O)O[C@H]([C@@H]1O)n1ccc(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 542 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:57996 | RHEA:57997 | RHEA:57998 | RHEA:57999 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Two ginseng UDP-glycosyltransferases synthesize ginsenoside Rg3 and Rd.
Jung S.-C., Kim W., Park S.C., Jeong J., Park M.K., Lim S., Lee Y., Im W.-T., Lee J.H., Choi G., Kim S.C.
Ginseng is a medicinal herb that requires cultivation under shade conditions, typically for 4-6 years, before harvesting. The principal components of ginseng are ginsenosides, glycosylated tetracyclic terpenes. Dammarene-type ginsenosides are classified into two groups, protopanaxadiol (PPD) and p ... >> More
Ginseng is a medicinal herb that requires cultivation under shade conditions, typically for 4-6 years, before harvesting. The principal components of ginseng are ginsenosides, glycosylated tetracyclic terpenes. Dammarene-type ginsenosides are classified into two groups, protopanaxadiol (PPD) and protopanaxatriol (PPT), based on their hydroxylation patterns, and further diverge to diverse ginsenosides through differential glycosylation. Three early enzymes, dammarenediol-II synthase (DS) and two P450 enzymes, protopanaxadiol synthase (PPDS) and protopanaxatriol synthase (PPTS), have been reported, but glycosyltransferases that are necessary to synthesize specific ginsenosides have not yet been fully identified. To discover glycosyltransferases responsible for ginsenoside biosynthesis, we sequenced and assembled the ginseng transcriptome de novo and characterized two UDP-glycosyltransferases (PgUGTs): PgUGT74AE2 and PgUGT94Q2. PgUGT74AE2 transfers a glucose moiety from UDP-glucose (UDP-Glc) to the C3 hydroxyl groups of PPD and compound K to form Rh2 and F2, respectively, whereas PgUGT94Q2 transfers a glucose moiety from UDP-Glc to Rh2 and F2 to form Rg3 and Rd, respectively. Introduction of the two UGT genes into yeast together with PgDS and PgPPDS resulted in the de novo production of Rg3. Our results indicate that these two UGTs are key enzymes for the synthesis of ginsenosides and provide a method for producing specific ginsenosides through yeast fermentation. << Less
Plant Cell Physiol. 55:2177-2188(2014) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.
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Production of bioactive ginsenosides Rh2 and Rg3 by metabolically engineered yeasts.
Wang P., Wei Y., Fan Y., Liu Q., Wei W., Yang C., Zhang L., Zhao G., Yue J., Yan X., Zhou Z.
Ginsenosides Rh2 and Rg3 represent promising candidates for cancer prevention and therapy and have low toxicity. However, the concentrations of Rh2 and Rg3 are extremely low in the bioactive constituents (triterpene saponins) of ginseng. Despite the available heterologous biosynthesis of their agl ... >> More
Ginsenosides Rh2 and Rg3 represent promising candidates for cancer prevention and therapy and have low toxicity. However, the concentrations of Rh2 and Rg3 are extremely low in the bioactive constituents (triterpene saponins) of ginseng. Despite the available heterologous biosynthesis of their aglycone (protopanaxadiol, PPD) in yeast, production of Rh2 and Rg3 by a synthetic biology approach was hindered by the absence of bioparts to glucosylate the C3 hydroxyl of PPD. In this study, two UDP-glycosyltransferases (UGTs) were cloned and identified from Panax ginseng. UGTPg45 selectively transfers a glucose moiety to the C3 hydroxyl of PPD and its ginsenosides. UGTPg29 selectively transfers a glucose moiety to the C3 glucose of Rh2 to form a 1-2-glycosidic bond. Based on the two UGTs and a yeast chassis to produce PPD, yeast cell factories were built to produce Rh2 and/or Rg3 from glucose. The turnover number (kcat) of UGTPg29 was more than 2500-fold that of UGTPg45, which might explain the higher Rg3 yield than that of Rh2 in the yeast cell factories. Building yeast cell factories to produce Rh2 or Rg3 from simple sugars by microbial fermentation provides an alternative approach to replace the traditional method of extracting ginsenosides from Panax plants. << Less
Metab. Eng. 29:97-105(2015) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.