Identification
HMDB Protein ID CDBP04363
Secondary Accession Numbers Not Available
Name Egl nine homolog 3
Description Not Available
Synonyms
  1. HIF-PH3
  2. HIF-prolyl hydroxylase 3
  3. HPH-1
  4. HPH-3
  5. Hypoxia-inducible factor prolyl hydroxylase 3
  6. PHD3
  7. Prolyl hydroxylase domain-containing protein 3
Gene Name EGLN3
Protein Type Enzyme
Biological Properties
General Function Involved in oxidoreductase activity
Specific Function Cellular oxygen sensor that catalyzes, under normoxic conditions, the post-translational formation of 4-hydroxyproline in hypoxia-inducible factor (HIF) alpha proteins. Hydroxylates a specific proline found in each of the oxygen-dependent degradation (ODD) domains (N-terminal, NODD, and C-terminal, CODD) of HIF1A. Also hydroxylates HIF2A. Has a preference for the CODD site for both HIF1A and HIF2A. Hydroxylation on the NODD site by EGLN3 appears to require prior hydroxylation on the CODD site. Hydroxylated HIFs are then targeted for proteasomal degradation via the von Hippel-Lindau ubiquitination complex. Under hypoxic conditions, the hydroxylation reaction is attenuated allowing HIFs to escape degradation resulting in their translocation to the nucleus, heterodimerization with HIF1B, and increased expression of hypoxy-inducible genes. EGLN3 is the most important isozyme in limiting physiological activation of HIFs (particularly HIF2A) in hypoxia. Also hydroxylates PKM in hypoxia, limiting glycolysis. Under normoxia, hydroxylates and regulates the stability of ADRB2. Regulator of cardiomyocyte and neuronal apoptosis. In cardiomyocytes, inhibits the anti-apoptotic effect of BCL2 by disrupting the BAX-BCL2 complex. In neurons, has a NGF-induced proapoptotic effect, probably through regulating CASP3 activity. Also essential for hypoxic regulation of neutrophilic inflammation. Plays a crucial role in DNA damage response (DDR) by hydroxylating TELO2, promoting its interaction with ATR which is required for activation of the ATR/CHK1/p53 pathway.
GO Classification
Biological Process
peptidyl-proline hydroxylation to 4-hydroxy-L-proline
regulation of neuron apoptotic process
protein hydroxylation
regulation of cell proliferation
activation of cysteine-type endopeptidase activity involved in apoptotic process
response to DNA damage stimulus
regulation of transcription from RNA polymerase II promoter in response to hypoxia
Cellular Component
cytosol
nucleoplasm
Function
cation binding
metal ion binding
binding
catalytic activity
transition metal ion binding
l-ascorbic acid binding
iron ion binding
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen
vitamin binding
oxidoreductase activity
ion binding
Molecular Function
oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen
L-ascorbic acid binding
iron ion binding
peptidyl-proline 4-dioxygenase activity
Process
metabolic process
oxidation reduction
Cellular Location
  1. Nucleus
  2. Cytoplasm
Pathways
Gene Properties
Chromosome Location 14
Locus 14q13.1
SNPs EGLN3
Gene Sequence
>720 bp
ATGCCCCTGGGACACATCATGAGGCTGGACCTGGAGAAAATTGCCCTGGAGTACATCGTG
CCCTGTCTGCACGAGGTGGGCTTCTGCTACCTGGACAACTTCCTGGGCGAGGTGGTGGGC
GACTGCGTCCTGGAGCGCGTCAAGCAGCTGCACTGCACCGGGGCCCTGCGGGACGGCCAG
CTGGCGGGGCCGCGCGCCGGCGTCTCCAAGCGACACCTGCGGGGCGACCAGATCACGTGG
ATCGGGGGCAACGAGGAGGGCTGCGAGGCCATCAGCTTCCTCCTGTCCCTCATCGACAGG
CTGGTCCTCTACTGCGGGAGCCGGCTGGGCAAATACTACGTCAAGGAGAGGTCTAAGGCA
ATGGTGGCTTGCTATCCGGGAAATGGAACAGGTTATGTTCGCCACGTGGACAACCCCAAC
GGTGATGGTCGCTGCATCACCTGCATCTACTATCTGAACAAGAATTGGGATGCCAAGCTA
CATGGTGGGATCCTGCGGATATTTCCAGAGGGGAAATCATTCATAGCAGATGTGGAGCCC
ATTTTTGACAGACTCCTGTTCTTCTGGTCAGATCGTAGGAACCCACACGAAGTGCAGCCC
TCTTACGCAACCAGATATGCTATGACTGTCTGGTACTTTGATGCTGAAGAAAGGGCAGAA
GCCAAAAAGAAATTCAGGAATTTAACTAGGAAAACTGAATCTGCCCTCACTGAAGACTGA
Protein Properties
Number of Residues 239
Molecular Weight 27261.06
Theoretical pI 7.636
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>Egl nine homolog 3
MPLGHIMRLDLEKIALEYIVPCLHEVGFCYLDNFLGEVVGDCVLERVKQLHCTGALRDGQ
LAGPRAGVSKRHLRGDQITWIGGNEEGCEAISFLLSLIDRLVLYCGSRLGKYYVKERSKA
MVACYPGNGTGYVRHVDNPNGDGRCITCIYYLNKNWDAKLHGGILRIFPEGKSFIADVEP
IFDRLLFFWSDRRNPHEVQPSYATRYAMTVWYFDAEERAEAKKKFRNLTRKTESALTED
GenBank ID Protein 14547150
UniProtKB/Swiss-Prot ID Q9H6Z9
UniProtKB/Swiss-Prot Entry Name EGLN3_HUMAN
PDB IDs Not Available
GenBank Gene ID AJ310545
GeneCard ID EGLN3
GenAtlas ID EGLN3
HGNC ID HGNC:14661
References
General References Not Available