4.2.1.125: dammarenediol II synthase
This is an abbreviated version!
For detailed information about dammarenediol II synthase, go to the full flat file.
Word Map on EC 4.2.1.125
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4.2.1.125
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panax
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ginsenosides
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ginseng
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saponin
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epoxidase
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protopanaxadiol
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triterpene
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jasmonate
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triterpenoid
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2,3-oxidosqualene
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adventitious
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tetracyclic
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aglycone
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dammarane-type
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notoginseng
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oxidosqualene
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elicitors
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nadph-cytochrome
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quinquefolius
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meyer
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beta-amyrin
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sapogenins
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lanosterol
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udp-glycosyltransferase
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cycloartenol
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chromatography-atmospheric
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synthesis
- 4.2.1.125
- panax
- ginsenosides
- ginseng
- saponin
-
epoxidase
- protopanaxadiol
-
triterpene
- jasmonate
-
triterpenoid
- 2,3-oxidosqualene
-
adventitious
-
tetracyclic
-
aglycone
-
dammarane-type
- notoginseng
- oxidosqualene
- elicitors
-
nadph-cytochrome
- quinquefolius
-
meyer
- beta-amyrin
-
sapogenins
- lanosterol
- udp-glycosyltransferase
- cycloartenol
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chromatography-atmospheric
- synthesis
Reaction
Synonyms
dammarenediol synthase, dammarenediol-II synthase, DDS, PgDDS, PgDDS1, PNA
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Substrates Products
Substrates Products on EC 4.2.1.125 - dammarenediol II synthase
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REACTION DIAGRAM
(S)-2,3-oxidosqualene + H2O
(20S)-dammarenediol
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S-isomer is the sole product, water addition to the dammarenyl cation intermediate is stereospecific
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?
(S)-2,3-oxidosqualene + H2O
(20S)-dammarenediol + hydroxydammarenone
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?
dammarenediol II
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-
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?
(3S)-2,3-epoxy-2,3-dihydrosqualene + H2O
dammarenediol II
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r
(3S)-2,3-epoxy-2,3-dihydrosqualene + H2O
dammarenediol II
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r
(3S)-2,3-epoxy-2,3-dihydrosqualene + H2O
dammarenediol II
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GC-MS product analysis
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?
(3S)-2,3-epoxy-2,3-dihydrosqualene + H2O
dammarenediol II
dammarenediol-II is a ginsenoside precursor
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-
?
(20S)-dammarenediol
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the accumulated product was confirmed as dammarenediol
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?
(3S)-2,3-oxidosqualene + H2O
(20S)-dammarenediol
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substrate is folded in a pre-chair-chair-chair conformation
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?
?
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LC-MS analysis of substrate and product amounts
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additional information
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LC-MS analysis of substrate and product amounts
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additional information
?
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dammarenediol-II synthase (DS) is a kind of 2,3-oxidosqualene-triterpene cyclase that catalyses 2,3-oxidosqualene to form dammarenediol-II. The substrate 2,3-oxidosqualene is cyclized by the enzyme at specific sites, and its particular 6-6-6-5 tetracyclic triterpenoid structure can be developed
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