Transmembrane Prolyl 4-Hydroxylase (P4HTM) Antibody – Rabbit Polyclonal

The product of this gene belongs to the family of prolyl 4-hydroxylases. This protein is a prolyl hydroxylase that may be involved in the degradation of hypoxia-inducible transcription factors under normoxia. It plays a role in adaptation to hypoxia and may be related to cellular oxygen sensing. Alternatively spliced variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

PH4: Catalyzes the post-translational formation of 4- hydroxyproline in hypoxia-inducible factor (HIF) alpha proteins. Hydroxylates HIF1A at 'Pro-402' and 'Pro-564'. May function as a cellular oxygen sensor and, under normoxic conditions, may target HIF through the hydroxylation for proteasomal degradation via the von Hippel-Lindau ubiquitination complex. 3 isoforms of the human protein are produced by alternative splicing.

Protein type: Oxidoreductase; EC 1.14.11.-; Membrane protein, integral

Chromosomal Location of Human Ortholog: 3p21.31|3p21.3

Cellular Component: endoplasmic reticulum membrane; integral to membrane

Molecular Function: iron ion binding; L-ascorbic acid binding; oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors

Biological Process: regulation of erythrocyte differentiation