IUBMB Enzyme Nomenclature


Accepted name: (1R,4R,5S)-(–)-guaia-6,10(14)-diene synthase

Reaction: (2E,6E)-farnesyl diphosphate = (1R,4R,5S)-(–)-guaia-6,10(14)-diene + diphosphate

For diagram of reaction click here

Glossary: (1R,4R,5S)-(–)-guaia-6,10(14)-diene = (1R)-1-methyl-4-methylidene-7-(propan-2-yl)-1,2,3,3a,4,5,6,8a-octahydroazulene = (1R)-7-isopropyl-1-methyl-4-methylene-1,2,3,3a,4,5,6,8a-octahydroazulene

Other name(s): STC5 (gene name)

Systematic name: (2E,6E)-farnesyl-diphosphate diphosphate-lyase [cyclizing, (1R,4R,5S)-(–)-guaia-6,10(14)-diene-forming]

Comments: The original enzyme (STC5) from the fungus Fusarium fujikuroi is inactive because of a critically naturally occuring mutation that leads to an asparagine to lysine exchange in the NSE (Asn-Ser-Glu) triad, a highly conserved motif of type I terpene cyclases. Sequence correction by site-directed mutagenesis (K288N) restores activity.

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


1. Burkhardt, I., Siemon, T., Henrot, M., Studt, L., Rosler, S., Tudzynski, B., Christmann, M. and Dickschat, J.S. Mechanistic characterisation of two sesquiterpene cyclases from the plant pathogenic fungus Fusarium fujikuroi. Angew. Chem. Int. Ed. Engl. 55 (2016) 8748-8751. [PMID: 27294564]

[EC created 2017]

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