Zeaxanthin epoxidase (, ''Zea-epoxidase'') is an
enzyme
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...
with
systematic name A systematic name is a name given in a systematic way to one unique group, organism, object or chemical substance, out of a specific population or collection. Systematic names are usually part of a nomenclature.
A semisystematic name or semitrivial ...
''zeaxanthin,NAD(P)H:oxygen oxidoreductase''.
This enzyme
catalyses the following
chemical reaction
A chemical reaction is a process that leads to the IUPAC nomenclature for organic transformations, chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the pos ...
:
zeaxanthin
Zeaxanthin is one of the most common carotenoids in nature, and is used in the xanthophyll cycle. Synthesized in plants and some micro-organisms, it is the pigment that gives paprika (made from bell peppers), corn, saffron, goji ( wolfberries), ...
+ 2 NAD(P)H + 2 H
+ + 2 O
2 violaxanthin + 2 NAD(P)
+ + 2 H
2O (overall reaction)
:(1a) zeaxanthin + NAD(P)H + H
+ + O
2 antheraxanthin + NAD(P)
+ + H
2O
:(1b) antheraxanthin + NAD(P)H + H
+ + O
2 violaxanthin + NAD(P)
+ + H
2O
Zeaxanthin epoxidase is a flavoprotein (FAD) that is active under conditions of low light.
References
External links
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EC 1.14.13