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 epoxidase is a flavoprotein (FAD) that is active under conditions of low light.
^Büch K, Stransky H, Hager A (November 1995). "FAD is a further essential cofactor of the NAD(P)H and O2-dependent zeaxanthin-epoxidase". FEBS Letters. 376 (1–2): 45–8. doi:10.1016/0014-5793(95)01243-9. PMID 8521963.
^Bugos RC, Hieber AD, Yamamoto HY (June 1998). "Xanthophyll cycle enzymes are members of the lipocalin family, the first identified from plants". The Journal of Biological Chemistry. 273 (25): 15321–4. doi:10.1074/jbc.273.25.15321. PMID 9624110.
^Thompson AJ, Jackson AC, Parker RA, Morpeth DR, Burbidge A, Taylor IB (April 2000). "Abscisic acid biosynthesis in tomato: regulation of zeaxanthin epoxidase and 9-cis-epoxycarotenoid dioxygenase mRNAs by light/dark cycles, water stress and abscisic acid". Plant Molecular Biology. 42 (6): 833–45. doi:10.1023/A:1006448428401. PMID 10890531.
^Hieber AD, Bugos RC, Yamamoto HY (October 2000). "Plant lipocalins: violaxanthin de-epoxidase and zeaxanthin epoxidase". Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology. 1482 (1–2): 84–91. doi:10.1016/s0167-4838(00)00141-2. PMID 11058750.
^Frommolt R, Goss R, Wilhelm C (July 2001). "The de-epoxidase and epoxidase reactions of Mantoniella squamata (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach". Planta. 213 (3): 446–56. doi:10.1007/s004250100589. PMID 11506368.
^Frommolt R, Goss R, Wilhelm C (2001). "Erratum Report. The de-epoxidase and epoxidase reactions of Mantoniella squamata (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach". Planta. 213 (3): 492. doi:10.1007/s004250100619.
^Matsubara S, Morosinotto T, Bassi R, Christian AL, Fischer-Schliebs E, Lüttge U, Orthen B, Franco AC, Scarano FR, Förster B, Pogson BJ, Osmond CB (October 2003). "Occurrence of the lutein-epoxide cycle in mistletoes of the Loranthaceae and Viscaceae". Planta. 217 (6): 868–79. doi:10.1007/s00425-003-1059-7. PMID 12844265.
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producing zeaxanthin. Zeaxanthin then reacts with O2, NADPH (H+), and reduced ferredoxin [iron-sulfur] cluster in the presence of the enzyme zeaxanthin epoxidase...
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