Prolyl hydroxylase domain

See also Hydroxylase

Prolyl hydroxylase domain (PHD) or egl nine homolog 1 (PHD2/EGLN1) proteins mediate oxygen-dependent degradation of Hypoxia-inducible factor (HIF) α subunit. They include PHD1, PHD2 and PHD3. The PHD is a Fe+2/oxogluterate (2OG)-dependent enzyme. 3ouh is the crystallized structure of the enzyme PHD2, an oxidoreductase that is 237 amino acids long with a molecular weight of 27 kDa. 3ouh is found in Homo sapiens and is a homolog of EGLN1 found in C. elegans.

The protein has three ligands: (a 1-(5-chloro-6-fluoro-1H-benzimidazol-2-yl)-1H-pyrazole-4-carboxylic acid), , and SO₄ (a sulfate ion). Water molecules are shown as red spheres. It is involved in mediating physiological responses to hypoxia by degrading the transcription factor of a hypoxia-inducible factor HIF1-α. In hypoxic conditions, the activity of PHD2 lessens, causing an increase in HIF1-α, resulting in secretion of erythropoietin, anaerobic glycolysis, and angiogenesis^[1]. ^[2] For more detalis see Molecular Playground/Prolyl Hydroxylase Domain (PHD) Enzyme.

3D Structures of prolyl hydroxylase domain

Polyl hydroxylase domain 3D structures

References

1. ↑ Stolze IP, Mole DR, Ratcliffe PJ. Regulation of HIF: prolyl hydroxylases. Novartis Found Symp. 2006;272:15-25; discussion 25-36. PMID:16686427
2. ↑ Rosen M D, Venkatesan H, Peltier H M, Bembenek S D, Kanelakis K C, Zhao L X, Leonard B E, Hocutt F M, Wu X, Palomino H L, Brondtetter T I, Haugh P V, Cagnon L, Yan W, Liotta L A, Young A, Mirzadegan T, Shankley N P, Barrett T D, Rabinowitz M H. Benzimidazole-2-pyrazole HIF Prolyl 4-Hydroxylase Inhibitors as Oral Erythropoietin Secretagogues. ACS Medicinal Chemical Letters. 2010 Oct 5.