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EC 5.5.1.15 Details
EC number
5.5.1.15
Accepted name
terpentedienyl-diphosphate synthase
Reaction
geranylgeranyl diphosphate = terpentedienyl diphosphate
Other name(s)
terpentedienol diphosphate synthase, Cyc1, clerodadienyl diphosphate synthase, terpentedienyl-diphosphate lyase (decyclizing)
Systematic name
terpentedienyl-diphosphate lyase (ring-opening)
Comment
Requires Mg2+. Contains a DXDD motif, which is a characteristic of diterpene cylases whose reactions are initiated by protonation at the 14,15-double bond of geranylgeranyl diphosphate (GGDP) [2]. The triggering proton is lost at the end of the cyclization reaction [3]. The product of the reaction, terpentedienyl diphosphate, is the substrate for EC 4.2.3.36, terpentetriene synthase and is a precursor of the diterpenoid antibiotic terpentecin.
History
created 2008
EC Tree
3.1.3.30 created 1972, deleted 1992
3.1.3.61 created 1992, deleted 2002
3.1.3.65 created 1992, deleted 2002