EC 4.2.3.135     
Accepted name: Δ6-protoilludene synthase
Reaction: (2E,6E)-farnesyl diphosphate = Δ6-protoilludene + diphosphate
Glossary: Δ6-protoilludene = (4aS,7aS,7bR)-3,6,6,7b-tetramethyl-2,4,4a,5,6,7,7a,7b-octahydro-1H-cyclobuta[1,2-e]indene
Other name(s): 6-protoilludene synthase
Systematic name: (2E,6E)-farnesyl-diphosphate diphosphate-lyase (cyclizing, Δ6-protoilludene-forming)
Comments: Isolated from the fungus Armillaria gallica. Δ6-Protoilludene is the first step in the biosynthesis of the melleolides.
References:
1.  Engels, B., Heinig, U., Grothe, T., Stadler, M. and Jennewein, S. Cloning and characterization of an Armillaria gallica cDNA encoding protoilludene synthase, which catalyzes the first committed step in the synthesis of antimicrobial melleolides. J. Biol. Chem. 286 (2011) 6871–6878. [PMID: 21148562]
[EC 4.2.3.135 created 2012]