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BKMS-react is an integrated and non-redundant biochemical reaction database containing known enzyme-catalyzed and spontaneous reactions. Biochemical reactions collected from BRENDA, KEGG, MetaCyc and SABIO-RK were matched and integrated by aligning substrates and products.
 

:= BRENDA, := KEGG, := MetaCyc, := SABIO-RK
:= amino acid sequences := show the reaction diagram
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  • EC Number
  • Reaction
  • Pathways
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  • Stoichiometry Check
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EC Number
Reaction
Pathways
Reaction IDs
Stoichiometry Check  
Commentary
violaxanthin de-epoxidase
antheraxanthin + L-ascorbate = zeaxanthin + L-dehydroascorbate + H2O
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: second step of two-step reaction (see R10055, R07178+R07179)
: Along with EC 1.14.13.90, zeaxanthin epoxidase, this enzyme forms part of the xanthophyll (or violaxanthin) cycle for controlling the concentration of CPD1F-130 in chloroplasts. It is activated by a low pH of the thylakoid lumen (produced by high light intensity). Zeaxanthin induces the dissipation of excitation energy in the chlorophyll of the light-harvesting protein complex of photosystem II. In higher plants the enzyme reacts with all-trans-diepoxides, such as CPD1F-133, and all-trans-monoepoxides, but in the alga TAX-13608 only the diepoxides are good substrates.
antheraxanthin + L-ascorbate = zeaxanthin + L-dehydroascorbate + H2O
-
: second step of two-step reaction (see R10055, R07178+R07179)
: Along with EC 1.14.13.90, zeaxanthin epoxidase, this enzyme forms part of the xanthophyll (or violaxanthin) cycle for controlling the concentration of CPD1F-130 in chloroplasts. It is activated by a low pH of the thylakoid lumen (produced by high light intensity). Zeaxanthin induces the dissipation of excitation energy in the chlorophyll of the light-harvesting protein complex of photosystem II. In higher plants the enzyme reacts with all-trans-diepoxides, such as CPD1F-133, and all-trans-monoepoxides, but in the alga TAX-13608 only the diepoxides are good substrates.