Enzymes
| UniProtKB help_outline | 1 proteins |
Reaction participants Show >> << Hide
- Name help_outline (2R,3R)-dihydrokaempferol Identifier CHEBI:15401 (CAS: 480-20-6) help_outline Charge 0 Formula C15H12O6 InChIKeyhelp_outline PADQINQHPQKXNL-LSDHHAIUSA-N SMILEShelp_outline O[C@@H]1[C@H](Oc2cc(O)cc(O)c2C1=O)c1ccc(O)cc1 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 O2 Identifier CHEBI:15379 (CAS: 7782-44-7) help_outline Charge 0 Formula O2 InChIKeyhelp_outline MYMOFIZGZYHOMD-UHFFFAOYSA-N SMILEShelp_outline O=O 2D coordinates Mol file for the small molecule Search links Involved in 2,648 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
reduced [NADPH—hemoprotein reductase]
Identifier
RHEA-COMP:11964
Reactive part
help_outline
- Name help_outline FMNH2 Identifier CHEBI:57618 (Beilstein: 6258176) help_outline Charge -2 Formula C17H21N4O9P InChIKeyhelp_outline YTNIXZGTHTVJBW-SCRDCRAPSA-L SMILEShelp_outline Cc1cc2Nc3c([nH]c(=O)[nH]c3=O)N(C[C@H](O)[C@H](O)[C@H](O)COP([O-])([O-])=O)c2cc1C 2D coordinates Mol file for the small molecule Search links Involved in 771 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (2R,3R)-dihydromyricetin Identifier CHEBI:28429 (Beilstein: 4331256,5303758; CAS: 27200-12-0) help_outline Charge 0 Formula C15H12O8 InChIKeyhelp_outline KJXSIXMJHKAJOD-LSDHHAIUSA-N SMILEShelp_outline O[C@@H]1[C@H](Oc2cc(O)cc(O)c2C1=O)c1cc(O)c(O)c(O)c1 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
- 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 H2O Identifier CHEBI:15377 (Beilstein: 3587155; CAS: 7732-18-5) help_outline Charge 0 Formula H2O InChIKeyhelp_outline XLYOFNOQVPJJNP-UHFFFAOYSA-N SMILEShelp_outline [H]O[H] 2D coordinates Mol file for the small molecule Search links Involved in 6,048 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
oxidized [NADPH—hemoprotein reductase]
Identifier
RHEA-COMP:11965
Reactive part
help_outline
- Name help_outline FMN Identifier CHEBI:58210 Charge -3 Formula C17H18N4O9P InChIKeyhelp_outline ANKZYBDXHMZBDK-SCRDCRAPSA-K SMILEShelp_outline C12=NC([N-]C(C1=NC=3C(N2C[C@@H]([C@@H]([C@@H](COP(=O)([O-])[O-])O)O)O)=CC(=C(C3)C)C)=O)=O 2D coordinates Mol file for the small molecule Search links Involved in 781 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:61108 | RHEA:61109 | RHEA:61110 | RHEA:61111 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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| MetaCyc help_outline |
Related reactions help_outline
More general form(s) of this reaction
Publications
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Flavonol biosynthesis genes and their use in engineering the plant antidiabetic metabolite montbretin A.
Irmisch S., Ruebsam H., Jancsik S., Man Saint Yuen M., Madilao L.L., Bohlmann J.
The plant metabolite montbretin A (MbA) and its precursor mini-MbA are potential new drugs for treating type 2 diabetes. These complex acylated flavonol glycosides only occur in small amounts in the corms of the ornamental plant montbretia (<i>Crocosmia</i> × <i>crocosmiiflora</i>). Our goal is to ... >> More
The plant metabolite montbretin A (MbA) and its precursor mini-MbA are potential new drugs for treating type 2 diabetes. These complex acylated flavonol glycosides only occur in small amounts in the corms of the ornamental plant montbretia (<i>Crocosmia</i> × <i>crocosmiiflora</i>). Our goal is to metabolically engineer <i>Nicotiana benthamiana</i> using montbretia genes to achieve increased production of mini-MbA and MbA. Two montbretia UDP-dependent glycosyltransferases (UGTs), CcUGT1 and CcUGT2, catalyze the formation of the first two pathway-specific intermediates in MbA biosynthesis, myricetin 3-<i>O</i>-rhamnoside and myricetin 3-<i>O</i>-glucosyl rhamnoside. In previous work, expression of these UGTs in <i>N. benthamiana</i> resulted in small amounts of kaempferol glycosides but not myricetin glycosides, suggesting that myricetin was limiting. Here, we investigated montbretia genes and enzymes of flavonol biosynthesis to enhance myricetin formation in <i>N. benthamiana</i> We characterized two flavanone hydroxylases, a flavonol synthase, a flavonoid 3'-hydroxylase (F3'H), and a flavonoid 3'5'-hydroxylase (F3'5'H). Montbretia flavonol synthase converted dihydromyricetin into myricetin. Unexpectedly, montbretia F3'5'H shared higher sequence relatedness with F3'Hs in the CYP75B subfamily of cytochromes P450 than with those with known F3'5'H activity. Transient expression of combinations of montbretia flavonol biosynthesis genes and a montbretia MYB transcription factor in <i>N. benthamiana</i> resulted in availability of myricetin for MbA biosynthesis. Transient coexpression of montbretia flavonol biosynthesis genes combined with <i>CcUGT1</i> and <i>CcUGT2</i> in <i>N. benthamiana</i> resulted in 2 mg g<sup>-1</sup> fresh weight of the MbA pathway-specific compound myricetin 3-<i>O</i>-glucosyl rhamnoside. Additional expression of the montbretia acyltransferase <i>CcAT1</i> led to detectable levels of mini-MbA in <i>N. benthamiana</i>. << Less
Plant Physiol. 180:1277-1290(2019) [PubMed] [EuropePMC]
This publication is cited by 13 other entries.
Comments
Multi-step reaction: RHEA:61112 and RHEA:61116