UniProt:P19235 EPOR

chain
  • signal peptide:1-24
  • chain:25-508
checksum F9F326E162E9512A
comment
  • FUNCTION Receptor for erythropoietin, which mediates erythropoietin-induced erythroblast proliferation and differentiation (PubMed:10388848, PubMed:2163695, PubMed:2163696, PubMed:8662939, PubMed:9774108). Upon EPO stimulation, EPOR dimerizes triggering the JAK2/STAT5 signaling cascade (By similarity). In some cell types, can also activate STAT1 and STAT3 (PubMed:11756159). May also activate the LYN tyrosine kinase (By similarity).FUNCTION Acts as a dominant-negative receptor of EPOR-mediated signaling.SUBUNIT Forms homodimers on EPO stimulation (PubMed:10388848, PubMed:9774108, PubMed:9974392). The tyrosine-phosphorylated form interacts with several SH2 domain-containing proteins including LYN, the adapter protein SH2B2, PTPN6, PTPN11, JAK2, PI3 kinases, STAT5A/B, SOCS3, CRKL (PubMed:12027890, PubMed:7534299). Interacts with INPP5D/SHIP1 (By similarity). SH2B2 binding inhibits the JAK-STAT signaling (PubMed:10374881). Interacts with RHEX; this interaction occurs in a erythropoietin (EPO)-dependent manner (PubMed:25092874). Interacts with ATXN2L (PubMed:11784712).INTERACTION Secreted and located to the cell surface.ALTERNATIVE PRODUCTS Erythroid cells and erythroid progenitor cells.TISSUE SPECIFICITY Isoform EPOR-F is the most abundant form in EPO-dependent erythroleukemia cells and in late-stage erythroid progenitors.TISSUE SPECIFICITY Isoform EPOR-S and isoform EPOR-T are the predominant forms in bone marrow.TISSUE SPECIFICITY Isoform EPOR-S and isoform EPOR-T are the predominant forms in bone marrow (PubMed:1324524). Isoform EPOR-T is the most abundant from in early-stage erythroid progenitor cells (PubMed:1324524).DOMAIN The WSXWS motif appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding.DOMAIN The box 1 motif is required for JAK interaction and/or activation.DOMAIN Contains 1 copy of a cytoplasmic motif that is referred to as the immunoreceptor tyrosine-based inhibitor motif (ITIM). This motif is involved in modulation of cellular responses. The phosphorylated ITIM motif can bind the SH2 domain of several SH2-containing phosphatases.PTM On EPO stimulation, phosphorylated on C-terminal tyrosine residues by JAK2 (PubMed:11781573). The phosphotyrosine motifs are also recruitment sites for several SH2-containing proteins and adapter proteins which mediate cell proliferation (PubMed:10374881). Phosphorylation on Tyr-454 is required for PTPN6 interaction, Tyr-426 for PTPN11 (By similarity). Tyr-426 is also required for SOCS3 binding, but Tyr-454/Tyr-456 motif is the preferred binding site (PubMed:12027890).PTM Ubiquitinated by the ECS(SOCS2) complex following ligand-binding and phosphorylation by JAK2, leading to its degradation by the proteasome (PubMed:11781573, PubMed:31182716). Regulation by the ECS(SOCS2) complex acts as a negative feedback loop of erythropoietin-mediated signaling pathway (PubMed:11781573). Ubiquitination at Lys-281 mediates receptor internalization, whereas ubiquitination at Lys-453 promotes trafficking of activated receptors to the lysosomes for degradation (By similarity). Ubiquitinated by NOSIP; appears to be either multi-monoubiquitinated or polyubiquitinated (PubMed:12746455). Ubiquitination mediates proliferation and survival of EPO-dependent cells (By similarity).DISEASE The disease is caused by variants affecting the gene represented in this entry.SIMILARITY Belongs to the type I cytokine receptor family. Type 1 subfamily.
crossReference
databaseName UniProt
dbId 54394
description
  • recommendedName: fullName evidence="28"Erythropoietin receptor shortName evidence="28"EPO-R
displayName UniProt:P19235 EPOR
geneName
  • EPOR
identifier P19235
isSequenceChanged false
keyword
  • 3D-structure
  • Alternative splicing
  • Cell membrane
  • Congenital erythrocytosis
  • Disease variant
  • Disulfide bond
  • Glycoprotein
  • Isopeptide bond
  • Membrane
  • Phosphoprotein
  • Proteomics identification
  • Receptor
  • Reference proteome
  • Secreted
  • Signal
  • Transmembrane
  • Transmembrane helix
  • Ubl conjugation
modified [InstanceEdit:9926675] Weiser, Joel, 2024-11-03
moleculeType Protein
name
  • EPOR
otherIdentifier
  • 1087_at
  • 11740081_a_at
  • 16868928
  • 2057
  • 209962_PM_at
  • 209962_at
  • 209963_PM_s_at
  • 209963_s_at
  • 215054_3p_at
  • 215054_PM_at
  • 215054_at
  • 31681_at
  • 37986_PM_at
  • 37986_at
  • 3850860
  • 3850861
  • 3850862
  • 3850863
  • 3850864
  • 3850869
  • 3850870
  • 3850871
  • 3850872
  • 3850873
  • 3850874
  • 3850875
  • 3850876
  • 3850877
  • 3850878
  • 3850879
  • 3850881
  • 3850882
  • 3850883
  • 396_3p_f_at
  • 396_PM_f_at
  • 396_f_at
  • 4876922C_3p_at
  • 8034217
  • A_23_P367899
  • A_23_P381954
  • A_24_P914376
  • GE58209
  • GO:0004888
  • GO:0004896
  • GO:0004900
  • GO:0005515
  • GO:0005576
  • GO:0005886
  • GO:0007165
  • GO:0007420
  • GO:0007507
  • GO:0009897
  • GO:0016020
  • GO:0016607
  • GO:0019221
  • GO:0030163
  • GO:0038162
  • GO:0042802
  • GO:0043161
  • GO:0046697
  • GO:0048856
  • HMNXSV003015443
  • Hs.89548.1.S1_3p_s_at
  • ILMN_2168347
  • M60459_at
  • PH_hs_0007355
  • TC19002335.hg
  • TC19002676.hg
  • X97671cds_3p_s_at
  • g182200_3p_at
  • g182200_3p_x_at
  • p26738
physicalEntity
referenceDatabase [ReferenceDatabase:2] UniProt
referenceGene
referenceTranscript
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • EPOR_HUMAN
  • B2RCG4
  • Q15443
  • Q2M205
sequenceLength 508
species [Species:48887] Homo sapiens
stId uniprot:P19235
url http://purl.uniprot.org/uniprot/P19235
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