Zeaxanthin epoxidase

Zeaxanthin epoxidase
Identifiers
EC number 1.14.13.90
CAS number 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

Zeaxanthin epoxidase (EC 1.14.13.90, Zea-epoxidase) is an enzyme with system 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 \rightleftharpoons violaxanthin + 2 NAD(P)+ + 2 H2O (overall reaction)
(1a) zeaxanthin + NAD(P)H + H+ + O2 \rightleftharpoons antheraxanthin + NAD(P)+ + H2O
(1b) antheraxanthin + NAD(P)H + H+ + O2 \rightleftharpoons violaxanthin + NAD(P)+ + H2O

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

References

  1. ↑ Buch, K., Stransky, H. and Hager, A. (1995). "FAD is a further essential cofactor of the NAD(P)H and O2-dependent zeaxanthin-epoxidase". FEBS Lett. 376 (1-2): 45–48. doi:10.1016/0014-5793(95)01243-9. PMID 8521963.
  2. ↑ Bugos, R.C., Hieber, A.D. and Yamamoto, H.Y. (1998). "Xanthophyll cycle enzymes are members of the lipocalin family, the first identified from plants". J. Biol. Chem. 273 (25): 15321–15324. doi:10.1074/jbc.273.25.15321. PMID 9624110.
  3. ↑ Thompson, A.J., Jackson, A.C., Parker, R.A., Morpeth, D.R., Burbidge, A. and Taylor, I.B. (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 Mol. Biol. 42 (6): 833–845. PMID 10890531.
  4. ↑ Hieber, A.D., Bugos, R.C. and Yamamoto, H.Y. (2000). "Plant lipocalins: violaxanthin de-epoxidase and zeaxanthin epoxidase". Biochim. Biophys. Acta 1482 (1-2): 84–91. doi:10.1016/s0167-4838(00)00141-2. PMID 11058750.
  5. ↑ Frommolt, R., Goss, R. and Wilhelm, C. (2001). "The de-epoxidase and epoxidase reactions of Mantoniella squamata (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach". Planta 213 (3): 446–456. doi:10.1007/s004250100589. PMID 11506368.
  6. ↑ Frommolt, R., Goss, R. and 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): 492–492. doi:10.1007/s004250100619.
  7. ↑ Matsubara, S., Morosinotto, T., Bassi, R., Christian, A.L., Fischer-Schliebs, E., Luttge, U., Orthen, B., Franco, A.C., Scarano, F.R., Forster, B., Pogson, B.J. and Osmond, C.B. (2003). "Occurrence of the lutein-epoxide cycle in mistletoes of the Loranthaceae and Viscaceae". Planta 217 (6): 868–879. doi:10.1007/s00425-003-1059-7. PMID 12844265.

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