IUBMB Enzyme Nomenclature


Accepted name: cyclooctat-9-en-7-ol synthase

Reaction: geranylgeranyl diphosphate + H2O = cyclooctat-9-en-7-ol + diphosphate

For diagram of reaction click here and mechanism click here.

Glossary: cyclooctat-9-en-7-ol = (1S,3aS,4R,7S,9aS,10aS)-1,4,9a-trimethyl-7-(propan-2-yl)-1,2,3,3a,4,5,7,8,9,9a,10,10a-dodecahydrodicyclopenta[a,d][8]annulen-4-ol

Other name(s): cetB2

Systematic name: geranylgeranyl-diphosphate diphosphate-lyase (cyclooctat-9-en-7-ol-forming)

Comments: Requires Mg2+. Isolated from the bacterium Streptomyces melanosporofaciens, where it is part of the biosynthesis of cyclooctatin, a potent inhibitor of lysophospholipase.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Kim, S.Y., Zhao, P., Igarashi, M., Sawa, R., Tomita, T., Nishiyama, M. and Kuzuyama, T. Cloning and heterologous expression of the cyclooctatin biosynthetic gene cluster afford a diterpene cyclase and two P450 hydroxylases. Chem. Biol. 16 (2009) 736-743. [PMID: 19635410]

2. Zhang, X., Shang, G., Gu, L. and Shen, Y. Crystallization and preliminary X-ray diffraction analysis of the diterpene cyclooctatin synthase (CYC) from Streptomyces sp. LZ35. Acta Crystallogr. F Struct. Biol. Commun. 70 (2014) 366-369. [PMID: 24598929]

[EC created 2014]

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