1,25-dihydroxyvitamin D(3) 24-hydroxylase, mitochondrial (CYP24A1)

Has a role in maintaining calcium homeostasis. Catalyzes the adrenodoxin-dependent 24-hydroxylation of calcidiol (25- hydroxyvitamin D(3)) and calcitriol (1-alpha,25-dihydroxyvitamin D(3)).

The receptor can do up to 6 rounds of hydroxylation of calcitriol leading to calcitroic acid. It also reveals 23- hydroxylating activity leading to 1-alpha,25-dihydroxyvitamin D(3)-26,23-lactone as end product.