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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
2.5.1.12 created 1972, deleted 1976
2.5.1.13 created 1972, deleted 1976
2.5.1.14 created 1972, deleted 1976
2.5.1.37 created 1989, deleted 2004
2.5.1.40 created 1992, deleted 1999