Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Protein

Egl nine homolog 3

Gene

EGLN3

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

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. Target proteins are preferentially recognized via a LXXLAP motif.11 Publications

Catalytic activityi

Hypoxia-inducible factor-L-proline + 2-oxoglutarate + O2 = hypoxia-inducible factor-trans-4-hydroxy-L-proline + succinate + CO2.1 Publication

Cofactori

Protein has several cofactor binding sites:

Enzyme regulationi

Activated in cardiovascular cells and Hela cells following exposure to hypoxia. Inhibited by polynitrogen compounds probably by chelation to Fe2+ ions.3 Publications

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi135IronPROSITE-ProRule annotation1
Metal bindingi137IronPROSITE-ProRule annotation1
Metal bindingi196IronPROSITE-ProRule annotation1
Binding sitei2052-oxoglutaratePROSITE-ProRule annotation1

GO - Molecular functioni

GO - Biological processi

  • activation of cysteine-type endopeptidase activity involved in apoptotic process Source: UniProtKB
  • apoptotic process Source: UniProtKB
  • cellular response to DNA damage stimulus Source: UniProtKB-KW
  • peptidyl-proline hydroxylation to 4-hydroxy-L-proline Source: FlyBase
  • protein hydroxylation Source: UniProtKB
  • regulation of cell proliferation Source: UniProtKB
  • regulation of neuron apoptotic process Source: UniProtKB
  • regulation of transcription from RNA polymerase II promoter in response to hypoxia Source: Reactome
  • response to hypoxia Source: UniProtKB

Keywordsi

Molecular functionDioxygenase, Oxidoreductase
Biological processApoptosis, DNA damage
LigandIron, Metal-binding, Vitamin C

Enzyme and pathway databases

BRENDAi1.14.11.2. 2681.
1.14.11.29. 2681.
ReactomeiR-HSA-1234176. Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha.

Names & Taxonomyi

Protein namesi
Recommended name:
Egl nine homolog 3 (EC:1.14.11.29)
Alternative name(s):
HPH-1
Hypoxia-inducible factor prolyl hydroxylase 3
Short name:
HIF-PH3
Short name:
HIF-prolyl hydroxylase 3
Short name:
HPH-3
Prolyl hydroxylase domain-containing protein 3
Short name:
PHD3
Gene namesi
Name:EGLN3
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
Proteomesi
  • UP000005640 Componenti: Chromosome 14

Organism-specific databases

HGNCiHGNC:14661. EGLN3.

Subcellular locationi

GO - Cellular componenti

  • cytoplasm Source: UniProtKB
  • cytosol Source: HPA
  • nucleoplasm Source: Reactome
  • nucleus Source: UniProtKB

Keywords - Cellular componenti

Cytoplasm, Nucleus

Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Mutagenesisi91 – 102ISFLL…IDRLV → RSFLRSLIRRLR: Abolishes interaction with ADRB2 and no increase in cellular abundance of ADRB2. 1 PublicationAdd BLAST12
Mutagenesisi135H → A: Eliminates hydroxylase activity. 1 Publication1
Mutagenesisi137D → A: Eliminates hydroxylase activity. 1 Publication1
Mutagenesisi196H → A: Eliminates hydroxylase activity. 1 Publication1

Organism-specific databases

DisGeNETi112399.
OpenTargetsiENSG00000129521.
PharmGKBiPA27672.

Chemistry databases

ChEMBLiCHEMBL5705.
DrugBankiDB04847. FG-4592.
DB00126. Vitamin C.
GuidetoPHARMACOLOGYi2834.

Polymorphism and mutation databases

BioMutaiEGLN3.
DMDMi32129515.

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00002066661 – 239Egl nine homolog 3Add BLAST239

Proteomic databases

EPDiQ9H6Z9.
MaxQBiQ9H6Z9.
PaxDbiQ9H6Z9.
PeptideAtlasiQ9H6Z9.
PRIDEiQ9H6Z9.

PTM databases

iPTMnetiQ9H6Z9.
PhosphoSitePlusiQ9H6Z9.

Expressioni

Tissue specificityi

Widely expressed at low levels. Expressed at higher levels in adult heart (cardiac myocytes, aortic endothelial cells and coronary artery smooth muscle), lung and placenta, and in fetal spleen, heart and skeletal muscle. Also expressed in pancreas. Localized to pancreatic acini and islet cells.3 Publications

Inductioni

Induced by hypoxia in a number of cells including neutrophils and certain cancer cell lines. Up-regulated 10-fold in pancreatic cancers.4 Publications

Gene expression databases

BgeeiENSG00000129521.
CleanExiHS_EGLN3.
ExpressionAtlasiQ9H6Z9. baseline and differential.
GenevisibleiQ9H6Z9. HS.

Organism-specific databases

HPAiHPA064895.

Interactioni

Subunit structurei

Interacts with WDR83; the interaction leads to almost complete elimination of HIF-mediated reporter activity (By similarity). Interacts with BCL2 (via its BH4 domain); the interaction disrupts the BAX-BCL4 complex inhibiting the anti-apoptotic activity of BCL2. Interacts with ADRB2; the interaction hydroxylates ADRB2 facilitating its ubiquitination by the VHL-E3 ligase complex. Interacts with PAX2; the interaction targets PAX2 for destruction. Interacts with PKM; the interaction hydroxylates PKM in hypoxia.By similarity6 Publications

Binary interactionsi

Show more details

Protein-protein interaction databases

BioGridi125185. 36 interactors.
IntActiQ9H6Z9. 225 interactors.
MINTiMINT-1206284.
STRINGi9606.ENSP00000250457.

Chemistry databases

BindingDBiQ9H6Z9.

Structurei

3D structure databases

ProteinModelPortaliQ9H6Z9.
SMRiQ9H6Z9.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini116 – 214Fe2OG dioxygenasePROSITE-ProRule annotationAdd BLAST99

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni62 – 73Beta(2)beta(3) 'finger-like' loopBy similarityAdd BLAST12
Regioni88 – 104Required for interaction with ADRB21 PublicationAdd BLAST17

Domaini

The Beta2beta3 'finger-like' loop domain is important for substrate (HIFs' CODD/NODD) selectivity.

Phylogenomic databases

eggNOGiKOG3710. Eukaryota.
ENOG410ZHZN. LUCA.
GeneTreeiENSGT00390000001936.
HOGENOMiHOG000004818.
HOVERGENiHBG051455.
InParanoidiQ9H6Z9.
KOiK09592.
OMAiCEAINFL.
OrthoDBiEOG091G03SP.
PhylomeDBiQ9H6Z9.
TreeFamiTF314595.

Family and domain databases

InterProiView protein in InterPro
IPR005123. Oxoglu/Fe-dep_dioxygenase.
IPR006620. Pro_4_hyd_alph.
PfamiView protein in Pfam
PF13640. 2OG-FeII_Oxy_3. 1 hit.
SMARTiView protein in SMART
SM00702. P4Hc. 1 hit.
PROSITEiView protein in PROSITE
PS51471. FE2OG_OXY. 1 hit.

Sequencei

Sequence statusi: Complete.

Q9H6Z9-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MPLGHIMRLD LEKIALEYIV PCLHEVGFCY LDNFLGEVVG DCVLERVKQL
60 70 80 90 100
HCTGALRDGQ LAGPRAGVSK RHLRGDQITW IGGNEEGCEA ISFLLSLIDR
110 120 130 140 150
LVLYCGSRLG KYYVKERSKA MVACYPGNGT GYVRHVDNPN GDGRCITCIY
160 170 180 190 200
YLNKNWDAKL HGGILRIFPE GKSFIADVEP IFDRLLFFWS DRRNPHEVQP
210 220 230
SYATRYAMTV WYFDAEERAE AKKKFRNLTR KTESALTED
Length:239
Mass (Da):27,261
Last modified:March 1, 2001 - v1
Checksum:i9DA3A0F80168557B
GO

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Natural variantiVAR_050449136V → L. Corresponds to variant dbSNP:rs17102002Ensembl.1
Natural variantiVAR_050450234S → T. Corresponds to variant dbSNP:rs17101995Ensembl.1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AJ310545 mRNA. Translation: CAC42511.1.
AK025273 mRNA. Translation: BAB15101.1.
BC010992 mRNA. Translation: AAH10992.3.
BC064924 mRNA. Translation: AAH64924.2.
BC105939 mRNA. Translation: AAI05940.1.
BC111057 mRNA. Translation: AAI11058.2.
CCDSiCCDS9646.1.
RefSeqiNP_001295032.1. NM_001308103.1.
NP_071356.1. NM_022073.3.
UniGeneiHs.135507.
Hs.597964.

Genome annotation databases

EnsembliENST00000250457; ENSP00000250457; ENSG00000129521.
GeneIDi112399.
KEGGihsa:112399.
UCSCiuc001wsa.5. human.

Keywords - Coding sequence diversityi

Polymorphism

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.

Entry informationi

Entry nameiEGLN3_HUMAN
AccessioniPrimary (citable) accession number: Q9H6Z9
Secondary accession number(s): Q2TA79, Q3B8N4, Q6P1R2
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 16, 2003
Last sequence update: March 1, 2001
Last modified: March 15, 2017
This is version 149 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Human chromosome 14
    Human chromosome 14: entries, gene names and cross-references to MIM
  2. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
  3. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot