my-server
← Wiki

Violaxanthin de-epoxidase

Violaxanthin de-epoxidase (, VDE) is an enzyme with systematic name violaxanthin:ascorbate oxidoreductase. This enzyme catalyses the following chemical reaction

violaxanthin + 2 L-ascorbate zeaxanthin + 2 L-dehydroascorbate + 2 H<sub>2</sub>O (overall reaction)
(1a) violaxanthin + L-ascorbate antheraxanthin + L-dehydroascorbate + H<sub>2</sub>O
(1b) antheraxanthin + L-ascorbate zeaxanthin + L-dehydroascorbate + H<sub>2</sub>O

Violaxanthin de-epoxidase is a part of the xanthophyll (or violaxanthin) cycle for controlling the concentration of zeaxanthin in chloroplasts.

References

External links