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Analysis of oxygen sensitive pathways that regulate the hypoxia inducible factor (HIF) transcriptional system has revealed a novel role for oxygenases in signalling hypoxia. The enzymes, which catalyse hydroxylation of specific prolyl and asparaginyl residues in the regulatory HIF-alpha subunits, belong to the superfamily of non-haem Fe(II)-dependent oxygenases that use the citric acid cycle intermediate 2-oxoglutarate (2OG) as a co-substrate. We review biochemical and physiological data that demonstrate a central role for these oxygenases in integrating multiple signals that coordinate cellular responses to hypoxia.

Original publication

DOI

10.1016/j.bbrc.2005.08.111

Type

Journal article

Journal

Biochem Biophys Res Commun

Publication Date

09/12/2005

Volume

338

Pages

617 - 626

Keywords

Animals, Humans, Hypoxia, Hypoxia-Inducible Factor 1, Mixed Function Oxygenases, Signal Transduction