The use of dioxygen by HIF prolyl hydroxylase (PHD1).

The hypoxic response in animals is mediated by hydroxylation of proline residues in the alpha-subunit of hypoxia inducible factor (HIF). Hydroxylation is catalysed by prolyl-4-hydroxylases (PHD isozymes in humans) which are iron(II) and 2-oxoglutarate dependent oxygenases. Mutation of the arginine p...

Full description

Bibliographic Details
Main Authors: McNeill, L, Hewitson, K, Gleadle, J, Horsfall, L, Oldham, N, Maxwell, P, Pugh, C, Ratcliffe, P, Schofield, C
Format: Journal article
Language:English
Published: 2002
Description
Summary:The hypoxic response in animals is mediated by hydroxylation of proline residues in the alpha-subunit of hypoxia inducible factor (HIF). Hydroxylation is catalysed by prolyl-4-hydroxylases (PHD isozymes in humans) which are iron(II) and 2-oxoglutarate dependent oxygenases. Mutation of the arginine proposed to bind 2-oxoglutarate and of the 2His-1-carboxylate iron(II) binding motif in PHD1 dramatically reduces its activity. The source of the oxygen of the product alcohol is (>95%) dioxygen.