Accepted name: isoelisabethatriene synthase
Reaction: geranylgeranyl diphosphate = isoelisabethatriene + diphosphate
Glossary: isoelisabethatriene = (1S,4R)-4,7-dimethyl-1-[(2R)-6-methylhept-5-en-2-yl]-1,2,3,4,5,6-hexahydronaphthalene
Other name(s): HpS (ambiguous)
Systematic name: geranylgeranyl-diphosphate diphosphate-lyase (cyclizing, isoelisabethatriene-forming)
Comments: Isolated from the bacterium Streptomyces clavuligerus. The 1-proR hydrogen atom of geranylgeranyl diphosphate is involved in a 1,3-hydride shift to the side-chain. The enzyme also produces hydropyrene, hydropyrenol, and traces of other diterpenoids. cf. EC, hydropyrene synthase, and EC, hydropyrenol synthase.
1.  Rinkel, J., Rabe, P., Chen, X., Kollner, T.G., Chen, F. and Dickschat, J.S. Mechanisms of the diterpene cyclases β-pinacene synthase from Dictyostelium discoideum and hydropyrene synthase from Streptomyces clavuligerus. Chem. Eur. J. 23 (2017) 10501–10505. [PMID: 28696553]
[EC created 2019]