- Source: Neoxanthin synthase
In enzymology, a neoxanthin synthase (EC 5.3.99.9) is an enzyme that catalyzes the chemical reaction:
violaxanthin
⇌
{\displaystyle \rightleftharpoons }
neoxanthin
Hence, this enzyme has one substrate, violaxanthin, and one product, neoxanthin.
This enzyme belongs to the family of isomerases, specifically a class of other intramolecular oxidoreductases. The systematic name of this enzyme class is violaxanthin---neoxanthin isomerase (epoxide-opening). This enzyme is also called NSY. This enzyme participates in carotenoid biosynthesis - general.
References
Beyer P; Hugueney, P; Schledz, M; Welsch, R; Frohnmeyer, H; Laule, O; Beyer, P (2000). "Identification of a novel gene coding for neoxanthin synthase from Solanum tuberosum". FEBS Lett. 485 (2–3): 168–72. doi:10.1016/S0014-5793(00)02193-1. PMID 11094161. S2CID 24056399.
Bouvier F, D'harlingue A, Backhaus RA, Kumagai MH, Camara B (2000). "Identification of neoxanthin synthase as a carotenoid cyclase paralog". Eur. J. Biochem. 267 (21): 6346–52. doi:10.1046/j.1432-1327.2000.01722.x. PMID 11029576.
