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terpentedienyl-diphosphate lyase (decyclizing)
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) . The triggering proton is lost at the end of the cyclization reaction . The product of the reaction, terpentedienyl diphosphate, is the substrate for EC 220.127.116.11, terpentetriene synthase and is a precursor of the diterpenoid antibiotic terpentecin.
A new approach for the investigation of isoprenoid biosynthesis featuring pathway switching, deuterium hyperlabeling, and 1H NMR spectroscopy. The reaction mechanism of a novel streptomyces diterpene cyclase