_EC 4.2.1.128 Lupan-3-beta,20-diol synthase. 0 PDB entries  
EC 4.-.-.- Lyases. [3,636 PDB entries]
EC 4.2.-.- Carbon-oxygen lyases. [1,771 PDB entries]
EC 4.2.1.- Hydro-lyases. [1,375 PDB entries]
EC 4.2.1.128 Lupan-3-beta,20-diol synthase. [-]    

Reaction: Lupan-3-beta,20-diol = (3S)-2,3-epoxy-2,3-dihydrosqualene + H(2)O.
Comments: The reaction occurs in the reverse direction. The recombinant enzyme from Arabidopsis thaliana gives a 1:1 mixture of lupeol and lupan-3-beta,20-diol with small amounts of beta-amyrin, germanicol, taraxasterol and psi-taraxasterol. See Ec 5.4.99.41.
Links:   [IntEnz]   [ExPASy]   [KEGG]  

There are no PDB entries in enzyme class E.C.4.2.1.128