UniProt Protein Function: | 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. |
UniProt Protein Details: | 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:L-ascorbic acid binding; iron ion 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; calcium ion binding |
NCBI Summary: | 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] |
UniProt Code: | Q9NXG6 |
NCBI GenInfo Identifier: | 32129516 |
NCBI Gene ID: | 54681 |
NCBI Accession: | Q9NXG6.2 |
UniProt Secondary Accession: | Q9NXG6,Q6PAG6, Q8TCJ9, Q8WV55, Q96F22, Q9BW77, |
UniProt Related Accession: | Q9NXG6 |
Molecular Weight: | 502 |
NCBI Full Name: | Transmembrane prolyl 4-hydroxylase |
NCBI Synonym Full Names: | prolyl 4-hydroxylase, transmembrane (endoplasmic reticulum) |
NCBI Official Symbol: | P4HTM |
NCBI Official Synonym Symbols: | PH4; PH-4; PHD4; EGLN4; HIFPH4; P4H-TM |
NCBI Protein Information: | transmembrane prolyl 4-hydroxylase; HPH-4; HIF-PH4; proline 4-hydroxylase; HIF-prolyl hydroxylase 4; P4H with transmembrane domain; Prolyl hydroxlase domain-containing 4; hypoxia inducible factor prolyl 4 hydroxylase; hypoxia-inducible factor prolyl 4-hydroxylase; hypoxia-inducible factor prolyl hydroxylase 4 |
UniProt Protein Name: | Transmembrane prolyl 4-hydroxylase |
UniProt Synonym Protein Names: | Hypoxia-inducible factor prolyl hydroxylase 4; HIF-PH4; HIF-prolyl hydroxylase 4; HPH-4 |
Protein Family: | Transmembrane prolyl 4-hydroxylase |
UniProt Gene Name: | P4HTM |
UniProt Entry Name: | P4HTM_HUMAN |