Definitions for 25-hydroxyvitamin d3 1-alpha-hydroxylase

This page provides all possible meanings and translations of the word 25-hydroxyvitamin d3 1-alpha-hydroxylase

U.S. National Library of Medicine

  1. 25-Hydroxyvitamin D3 1-alpha-Hydroxylase

    A mitochondrial cytochrome P450 enzyme that catalyzes the 1-alpha-hydroxylation of 25-hydroxyvitamin D3 (also known as 25-hydroxycholecalciferol) in the presence of molecular oxygen and NADPH-FERRIHEMOPROTEIN REDUCTASE. This enzyme, encoded by CYP27B1 gene, converts 25-hydroxyvitamin D3 to 1-alpha,25-dihydroxyvitamin D3 which is the active form of VITAMIN D in regulating bone growth and calcium metabolism. This enzyme is also active on plant 25-hydroxyvitamin D2 (ergocalciferol).

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