Zeaxanthin epoxidase

Zeaxanthin epoxidase (EC 1.14.13.90, Zea-epoxidase) is an enzyme with systematic name zeaxanthin,NAD(P)H:oxygen oxidoreductase.^{[1][2][3][4][5][6][7]} This enzyme catalyses the following chemical reaction

zeaxanthin + 2 NAD(P)H + 2 H⁺ + 2 O₂ ${\displaystyle \rightleftharpoons }$ violaxanthin + 2 NAD(P)⁺ + 2 H₂O (overall reaction)

(1a) zeaxanthin + NAD(P)H + H⁺ + O₂ ${\displaystyle \rightleftharpoons }$ antheraxanthin + NAD(P)⁺ + H₂O

(1b) antheraxanthin + NAD(P)H + H⁺ + O₂ ${\displaystyle \rightleftharpoons }$ violaxanthin + NAD(P)⁺ + H₂O

Zeaxanthin epoxidase
Identifiers
EC no.	1.14.13.90
CAS no.	149718-34-3
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

Zeaxanthin epoxidase is a flavoprotein (FAD) that is active under conditions of low light.