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ENZYME entry: EC 1.14.15.21

Accepted Name
Zeaxanthin epoxidase.
Alternative Name(s)
Zea-epoxidase.
Reaction catalysed
Zeaxanthin + 4 reduced ferredoxin [iron-sulfur] cluster + 4 H(+) + 2 O(2) <=> violaxanthin + 4 oxidized ferredoxin [iron-sulfur] cluster + 2 H(2)O
Cofactor(s)
FAD.
Comment(s)
  • Active under conditions of low light.
  • Along with EC 1.23.5.1, this enzyme forms part of the xanthophyll (or violaxanthin) cycle, which is involved in protecting the plant against damage by excess light.
  • It will also epoxidize lutein in some higher-plant species.
  • Formerly EC 1.14.13.90.
Cross-references
BRENDA1.14.15.21
EC2PDB1.14.15.21
ExplorEnz1.14.15.21
PRIAM enzyme-specific profiles1.14.15.21
KEGG Ligand Database for Enzyme Nomenclature1.14.15.21
IUBMB Enzyme Nomenclature1.14.15.21
IntEnz1.14.15.21
MEDLINEFind literature relating to 1.14.15.21
MetaCyc1.14.15.21
UniProtKB/Swiss-Prot
Q96375, ABA2_CAPAN;  Q40412, ABA2_NICPL;  O81360, ABA2_PRUAR;  
P93236, ABA2_SOLLC;  A0A0K9RDW0, ABA2_SPIOL;  Q9FGC7, ZEP_ARATH;  
C3VEQ2, ZEP_ONCHC;  Q0JCU7, ZEP_ORYSJ;  

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