Product: Epo-R Antibody
Catalog: AF6211
Description: Rabbit polyclonal antibody to Epo-R
Application: WB IF/ICC
Reactivity: Human, Mouse, Rat, Monkey
Prediction: Pig, Sheep, Dog
Mol.Wt.: 65kDa; 55kD(Calculated).
Uniprot: P19235
RRID: AB_2835092

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Product Info

WB 1:500-1:2000, IF/ICC 1:100-1:500
*The optimal dilutions should be determined by the end user.

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Pig(86%), Sheep(86%), Dog(86%)
Epo-R Antibody detects endogenous levels of total Epo-R.
Cite Format: Affinity Biosciences Cat# AF6211, RRID:AB_2835092.
The antiserum was purified by peptide affinity chromatography using SulfoLink™ Coupling Resin (Thermo Fisher Scientific).
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


EPO R; EPO-R; epor; EPOR_HUMAN; Erythropoietin receptor; Erythropoietin receptor precursor; MGC138358;



Erythroid cells and erythroid progenitor cells. Isoform EPOR-F is the most abundant form in EPO-dependent erythroleukemia cells and in late-stage erythroid progenitors. Isoform EPOR-S and isoform EPOR-T are the predominant forms in bone marrow. Isoform EPOR-T is the most abundant from in early-stage erythroid progenitor cells.

Erythropoiesis is regulated through the interaction of erythropoietin (Epo) with its receptor, EpoR, a member of the cytokine superfamily of receptors. The human EpoR is a 507 amino acid transmembrane protein that forms homodimers following erythropoietin activation and is related to the interleukin 2 (IL-2) receptor β chain subunit (IL-2Rβ).



Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

PTMs - P19235 As Substrate

Site PTM Type Enzyme
S108 Phosphorylation
S115 Phosphorylation
S116 Phosphorylation
S185 Phosphorylation
S192 Phosphorylation
Y309 Phosphorylation
Y368 Phosphorylation O60674 (JAK2) , P07948 (LYN)
Y426 Phosphorylation
Y454 Phosphorylation
Y456 Phosphorylation
Y468 Phosphorylation
Y485 Phosphorylation
Y489 Phosphorylation
Y504 Phosphorylation

Research Backgrounds


Receptor for erythropoietin. Mediates erythropoietin-induced erythroblast proliferation and differentiation. Upon EPO stimulation, EPOR dimerizes triggering the JAK2/STAT5 signaling cascade. In some cell types, can also activate STAT1 and STAT3. May also activate the LYN tyrosine kinase.

Isoform EPOR-T acts as a dominant-negative receptor of EPOR-mediated signaling.


On EPO stimulation, phosphorylated on C-terminal tyrosine residues by JAK2. The phosphotyrosine motifs are also recruitment sites for several SH2-containing proteins and adapter proteins which mediate cell proliferation. Phosphorylation on Tyr-454 is required for PTPN6 interaction, Tyr-426 for PTPN11. Tyr-426 is also required for SOCS3 binding, but Tyr-454/Tyr-456 motif is the preferred binding site.

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. Ubiquitination mediates proliferation and survival of EPO-dependent cells.

Subcellular Location:

Cell membrane>Single-pass type I membrane protein.

Note: Secreted and located to the cell surface.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Erythroid cells and erythroid progenitor cells. Isoform EPOR-F is the most abundant form in EPO-dependent erythroleukemia cells and in late-stage erythroid progenitors. Isoform EPOR-S and isoform EPOR-T are the predominant forms in bone marrow. Isoform EPOR-T is the most abundant from in early-stage erythroid progenitor cells.

Subunit Structure:

Forms homodimers on EPO stimulation. The tyrosine-phosphorylated form interacts with several SH2 domain-containing proteins including LYN (By similarity), the adapter protein APS, PTPN6 (By similarity), PTPN11, JAK2, PI3 kinases, STAT5A/B, SOCS3, CRKL (By similarity). Interacts with INPP5D/SHIP1 (By similarity). The N-terminal SH2 domain of PTPN6 binds Tyr-454 and inhibits signaling through dephosphorylation of JAK2 (By similarity). APS binding also inhibits the JAK-STAT signaling. Binding to PTPN11, preferentially through the N-terminal SH2 domain, promotes mitogenesis and phosphorylation of PTPN11 (By similarity). Binding of JAK2 (through its N-terminal) promotes cell-surface expression (By similarity). Interacts with RHEX; this interaction occurs in a erythropoietin (EPO)-dependent manner. Interaction with the ubiquitin ligase NOSIP mediates EPO-induced cell proliferation. Interacts with ATXN2L.


The WSXWS motif appears to be necessary for proper protein folding and thereby efficient intracellular transport and cell-surface receptor binding.

The box 1 motif is required for JAK interaction and/or activation.

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.

Belongs to the type I cytokine receptor family. Type 1 subfamily.

Research Fields

· Environmental Information Processing > Signaling molecules and interaction > Cytokine-cytokine receptor interaction.   (View pathway)

· Environmental Information Processing > Signal transduction > PI3K-Akt signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > Jak-STAT signaling pathway.   (View pathway)

· Human Diseases > Cancers: Overview > Pathways in cancer.   (View pathway)

· Organismal Systems > Immune system > Hematopoietic cell lineage.   (View pathway)


1). Chen et al. The Effects of Curcumae Longae Radix, Curcuma phaeocaulis Radix and Their Processed Products on Epo/EpoR Pathway and CD62p. Frontiers in Pharmacology 2018 Jul 9;9:736 (PubMed: 30038572) [IF=5.6]

Application: WB    Species: rat    Sample: hepar

FIGURE 4 | Observation for EpoR protein expression in hepar. CG, control group, MG, model group, SHG, Curcumae Longae Radix group, CHG,Stir-frying Curcumae Longae Radix with vinegar group, JHG, Stir-frying Curcumae Longae Radix with wine group, SLG, Curcuma phaeocaulis Radix group, CLG, Stir-frying Curcuma phaeocaulis Radix with vinegar group, JLG,Stir-frying Curcuma phaeocaulis Radix with wine group and PoG, positive group. Values were mean ± SD (n = 6). ∗p < 0.05 and ∗∗p < 0.01 vs. Control group #p < 0.05 and ##p < 0.01 vs. model group 1p < 0.05 and P < 0.01 Curcuma phaeocaulis Radix group versus Curcumae Longae Radix group, Stir-frying Curcuma phaeocaulis Radix with vinegar group versus Stir-frying Curcumae Longae Radix with vinegar group, Stir-frying Curcuma phaeocaulis Radix with wine group versus Stir-frying Curcumae Longae Radix with wine group.

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