The Enzyme Database

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Accepted name: colneleate synthase
Reaction: (9S,10E,12Z)-9-hydroperoxyoctadeca-10,12-dienoate = (8E)-9-[(1E,3Z)-nona-1,3-dien-1-yloxy]non-8-enoate + H2O
Glossary: colneleate = (8E)-9-[(1E,3Z)-nona-1,3-dien-1-yloxy]non-8-enoate
Other name(s): 9-divinyl ether synthase; 9-DES; CYP74D; CYP74D1; CYP74 cytochrome P-450; DES1; (8E)-9-[(1E,3E)-nona-1,3-dien-1-yloxy]non-8-enoate synthase
Systematic name: (9S,10E,12Z)-9-hydroperoxyoctadeca-10,12-dienoate hydro-lyase
Comments: A heme-thiolate protein (P-450) [2]. It catalyses the selective removal of pro-R hydrogen at C-8 in the biosynthesis of colneleic acid [4]. It forms also (8E)-9-[(1E,3Z,6Z)-nona-1,3,6-trien-1-yloxy]non-8-enoic acid (i.e. colnelenate) from (9S,10E,12Z,15Z)-9-hydroperoxy-10,12,15-octadecatrienoate. The corresponding 13-hydroperoxides are poor substrates [1,3]. The divinyl ethers colneleate and colnelenate have antimicrobial activity.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Stumpe, M., Kandzia, R., Gobel, C., Rosahl, S. and Feussner, I. A pathogen-inducible divinyl ether synthase (CYP74D) from elicitor-treated potato suspension cells. FEBS Lett. 507 (2001) 371–376. [DOI] [PMID: 11696374]
2.  Itoh, A. and Howe, G.A. Molecular cloning of a divinyl ether synthase. Identification as a CYP74 cytochrome P-450. J. Biol. Chem. 276 (2001) 3620–3627. [DOI] [PMID: 11060314]
3.  Fammartino, A., Cardinale, F., Gobel, C., Mene-Saffrane, L., Fournier, J., Feussner, I. and Esquerre-Tugaye, M.T. Characterization of a divinyl ether biosynthetic pathway specifically associated with pathogenesis in tobacco. Plant Physiol. 143 (2007) 378–388. [DOI] [PMID: 17085514]
4.  Hamberg, M. Hidden stereospecificity in the biosynthesis of divinyl ether fatty acids. FEBS J. 272 (2005) 736–743. [DOI] [PMID: 15670154]
[EC created 2011, modified 2014]

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