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Zeaxanthin epoxidase

Class of enzymes

Class of enzymes

FieldValue
NameZeaxanthin epoxidase
EC_number1.14.13.90
CAS_number149718-34-3

Zeaxanthin epoxidase (, Zea-epoxidase) is an enzyme with systematic name zeaxanthin,NAD(P)H:oxygen oxidoreductase. 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

References

  1. (November 1995). "FAD is a further essential cofactor of the NAD(P)H and O2-dependent zeaxanthin-epoxidase". FEBS Letters.
  2. (June 1998). "Xanthophyll cycle enzymes are members of the lipocalin family, the first identified from plants". The Journal of Biological Chemistry.
  3. (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.
  4. (October 2000). "Plant lipocalins: violaxanthin de-epoxidase and zeaxanthin epoxidase". Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology.
  5. (July 2001). "The de-epoxidase and epoxidase reactions of Mantoniella squamata (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach". Planta.
  6. (2001). "Erratum Report. The de-epoxidase and epoxidase reactions of ''Mantoniella squamata'' (Prasinophyceae) exhibit different substrate-specific reaction kinetics compared to spinach". Planta.
  7. (October 2003). "Occurrence of the lutein-epoxide cycle in mistletoes of the Loranthaceae and Viscaceae". Planta.
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