Dammarenediol II synthase

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Dammarenediol II synthase
Dammarenediol II synthase
Identifiers
EC no.	4.2.1.125
CAS no.	189354-84-5
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
PMC
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NCBI	proteins

Last updated July 22, 2025

Dammarenediol II synthase (EC 4.2.1.125, dammarenediol synthase, 2,3-oxidosqualene (20S)-dammarenediol cyclase, DDS, (S)-squalene-2,3-epoxide hydro-lyase (dammarenediol-II forming)) is an enzyme with systematic name (3S)-2,3-epoxy-2,3-dihydrosqualene hydro-lyase (dammarenediol-II forming).^[1]^[2] This enzyme catalyses the following chemical reaction

dammarenediol II

\rightleftharpoons

(3S)-2,3-epoxy-2,3-dihydrosqualene + H₂O

The reaction occurs in the reverse direction.

References

↑ Tansakul P, Shibuya M, Kushiro T, Ebizuka Y (October 2006). "Dammarenediol-II synthase, the first dedicated enzyme for ginsenoside biosynthesis, in Panax ginseng". FEBS Letters. 580 (22): 5143–9. Bibcode:2006FEBSL.580.5143T. doi:10.1016/j.febslet.2006.08.044. PMID 16962103.
↑ Han JY, Kwon YS, Yang DC, Jung YR, Choi YE (December 2006). "Expression and RNA interference-induced silencing of the dammarenediol synthase gene in Panax ginseng". Plant & Cell Physiology. 47 (12): 1653–62. doi: 10.1093/pcp/pcl032 . PMID 17088293.

External links

Dammarenediol+II+synthase at the U.S. National Library of Medicine Medical Subject Headings (MeSH)

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[1] Tansakul P, Shibuya M, Kushiro T, Ebizuka Y (October 2006). "Dammarenediol-II synthase, the first dedicated enzyme for ginsenoside biosynthesis, in Panax ginseng". FEBS Letters. 580 (22): 5143–9. Bibcode:2006FEBSL.580.5143T. doi:10.1016/j.febslet.2006.08.044. PMID 16962103.

[2] Han JY, Kwon YS, Yang DC, Jung YR, Choi YE (December 2006). "Expression and RNA interference-induced silencing of the dammarenediol synthase gene in Panax ginseng". Plant & Cell Physiology. 47 (12): 1653–62. doi: 10.1093/pcp/pcl032 . PMID 17088293.

[1]

[2]

v t e Carbon–oxygen lyases (EC 4.2) (primarily dehydratases)
4.2.1: Hydro-Lyases	Carbonic anhydrase Fumarase Aconitase Enolase Alpha Enolase 2 Enoyl-CoA hydratase/3-Hydroxyacyl ACP dehydrase Methylglutaconyl-CoA hydratase Tryptophan synthase Cystathionine beta synthase Porphobilinogen synthase 3-Isopropylmalate dehydratase Urocanase Uroporphyrinogen III synthase Nitrile hydratase
4.2.2: Acting on polysaccharides	Hyaluronate lyase Pectin lyase
4.2.3: Acting on phosphates	Threonine synthase
4.2.99: Other	Carboxymethyloxysuccinate lyase Hydroperoxide lyase

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Diffusion-limited enzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)