Pentalenolactone F synthase (, PEND (gene), PNTD (gene), PTLD (gene)) is an enzyme with systematic name pentalenolactone-D,2-oxoglutarate:oxygen oxidoreductase. This enzyme catalyses the following chemical reaction
pentalenolactone D + 2 2-oxoglutarate + 2 O<sub>2</sub> pentalenolactone F + 2 succinate + 2 CO<sub>2</sub> + H<sub>2</sub>O (overall reaction)
(1a) pentalenolactone D + 2-oxoglutarate + O<sub>2</sub> pentalenolactone E + succinate + CO<sub>2</sub> + H<sub>2</sub>O
(1b) pentalenolactone E + 2-oxoglutarate + O<sub>2</sub> pentalenolactone F + succinate + CO<sub>2</sub>
Pentalenolactone F synthase contains Fe(II), and ascorbate is needed for its action.
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