IUBMB Enzyme Nomenclature


Accepted name: trimethyltridecatetraene synthase

Reaction: (6E,10E)-geranyllinalool + [reduced NADPH—hemoprotein reductase] + O2 = (3E,7E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene + [oxidized NADPH—hemoprotein reductase] + but-3-en-2-one + 2 H2O

For diagram of reaction click here.

Glossary: (6E,10E)-geranyllinalool = (6E,10E)-3,7,11,15-tetramethylhexadeca-1,6,10,14-tetraen-3-ol

Other name(s): CYP82G1; CYP92C5; CYP92C6; DMNT/TMTT homoterpene synthase

Systematic name: (6E,10E)-geranyllinalool,[reduced NADPH—hemoprotein reductase]:oxygen oxidoreductase

Comments: A cytochrome P-450 (heme-thiolate) protein isolated from the plants Arabidopsis thaliana (thale cress) and Zea mays (maize). It forms this C16 homoterpene in response to herbivore attack. In vitro some variants of the enzyme also convert (3S,6E)-nerolidol to (3E)-4,8-dimethylnona-1,3,7-triene (see EC, dimethylnonatriene synthase).

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


1. Lee, S., Badieyan, S., Bevan, D.R., Herde, M., Gatz, C. and Tholl, D. Herbivore-induced and floral homoterpene volatiles are biosynthesized by a single P450 enzyme (CYP82G1) in Arabidopsis. Proc. Natl Acad. Sci. USA 107 (2010) 21205-21210. [PMID: 21088219]

2. Richter, A., Schaff, C., Zhang, Z., Lipka, A.E., Tian, F., Kollner, T.G., Schnee, C., Preiss, S., Irmisch, S., Jander, G., Boland, W., Gershenzon, J., Buckler, E.S. and Degenhardt, J. Characterization of biosynthetic pathways for the production of the volatile homoterpenes DMNT and TMTT in Zea mays. Plant Cell 28 (2016) 2651-2665. [PMID: 27662898]

[EC created 2018]

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