Ubiquinone biosynthesis monooxygenase COQ6, mitochondrial (COQ6)

FAD-dependent monooxygenase required for the C5-ring hydroxylation during ubiquinone biosynthesis. Catalyzes the hydroxylation of 3-polyprenyl-4-hydroxybenzoic acid to 3- polyprenyl-4,5-dihydroxybenzoic acid.

The electrons required for the hydroxylation reaction might be funneled indirectly from NADPH via a ferredoxin/ferredoxin reductase system to COQ6. .