Entry
Name
Class
Isomerases;
Intramolecular oxidoreductases;
Other intramolecular oxidoreductases
BRITE hierarchy
Sysname
violaxanthin---neoxanthin isomerase (epoxide-opening)
Reaction(IUBMB)
violaxanthin = neoxanthin [RN:
R06948 ]
Reaction(KEGG)
Substrate
Product
Comment
The opening of the epoxide ring of violaxanthin generates a chiral allene. Neoxanthin is a precursor of the plant hormone abscisic acid and the last product of carotenoid synthesis in green plants [2].
History
EC 5.3.99.9 created 2005
Pathway
ec01110 Biosynthesis of secondary metabolites
Orthology
Genes
Taxonomy
Reference
Authors
Al-Babili S, Hugueney P, Schledz M, Welsch R, Frohnmeyer H, Laule O, Beyer P
Title
Identification of a novel gene coding for neoxanthin synthase from Solanum tuberosum.
Journal
Sequence
Reference
Authors
Bouvier F, D'harlingue A, Backhaus RA, Kumagai MH, Camara B
Title
Identification of neoxanthin synthase as a carotenoid cyclase paralog.
Journal
Sequence
Other DBs
ExplorEnz - The Enzyme Database: 5.3.99.9
ExPASy - ENZYME nomenclature database: 5.3.99.9
LinkDB
All DBs