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Valencene synthase

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Class of enzymes
Valencene synthase
Identifiers
EC no.4.2.3.73
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IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
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Valencene synthase (EC 4.2.3.73) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase (valencene-forming). It is a terpene cyclase enzyme responsible for the biosynthesis of valencene, a sesquiterpene, using farnesyl pyrophosphate as its substrate. The first such enzyme was isolated using orange cDNA. This enzyme catalyses the following chemical reaction

(2E,6E)-farnesyl diphosphate {\displaystyle \rightleftharpoons } (+)-valencene + diphosphate

The recombinant enzyme from Vitis vinifera forms (+)-valencene and (-)-7-epi-α-selinene.

References

  1. Lücker J, Bowen P, Bohlmann J (October 2004). "Vitis vinifera terpenoid cyclases: functional identification of two sesquiterpene synthase cDNAs encoding (+)-valencene synthase and (-)-germacrene D synthase and expression of mono- and sesquiterpene synthases in grapevine flowers and berries". Phytochemistry. 65 (19): 2649–59. doi:10.1016/j.phytochem.2004.08.017. PMID 15464152.
  2. Sharon-Asa L, Shalit M, Frydman A, Bar E, Holland D, Or E, et al. (December 2003). "Citrus fruit flavor and aroma biosynthesis: isolation, functional characterization, and developmental regulation of Cstps1, a key gene in the production of the sesquiterpene aroma compound valencene". The Plant Journal. 36 (5). Blackwell Publishing Ltd.: 664–74. doi:10.1046/j.1365-313x.2003.01910.x. PMID 14617067.

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Carbon–oxygen lyases (EC 4.2) (primarily dehydratases)
4.2.1: Hydro-Lyases
4.2.2: Acting on polysaccharides
4.2.3: Acting on phosphates
4.2.99: Other
Enzymes
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