Prolyl hydroxylase domain
Prolyl hydroxylase domain (PHD) 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. For more detalis see Molecular Playground/Prolyl Hydroxylase Domain (PHD) Enzyme.