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ENZYME

ENZYME entry: EC 1.14.15.21

Accepted Name
zeaxanthin epoxidase
Alternative Name(s)
zea-epoxidase
Reaction catalysed
all-trans-zeaxanthin + 4 H(+) + 2 O2 + 4 reduced [2Fe-2S]-[ferredoxin] = all-trans-violaxanthin + 2 H2O + 4 oxidized [2Fe-2S]-[ferredoxin]
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
Rhea expert-curated reactions1.14.15.21
UniProtKB/Swiss-Prot
Q96375, ABA2_CAPANQ40412, ABA2_NICPLO81360, ABA2_PRUAR
P93236, ABA2_SOLLCA0A0K9RDW0, ABA2_SPIOLQ9FGC7, ZEP_ARATH
C3VEQ2, ZEP_ONCHCQ0JCU7, ZEP_ORYSJ

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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 1.14.15.-
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