Description
Epo-R (Phospho-Tyr368)Colorimetric Cell-Based ELISA Kit
The EPO-R Phospho-Tyr368 Colorimetric Cell-Based ELISA Kit is a powerful tool for researchers looking to study the phosphorylation status of the Erythropoietin Receptor (EPO-R) at tyrosine 368 in cell-based assays. This kit offers high sensitivity and specificity, allowing for accurate detection and quantification of phospho-tyr368 EPO-R levels in cell lysates.The phosphorylation of EPO-R at tyrosine 368 is known to be a key regulatory event in the signaling pathway of erythropoietin, a hormone crucial for red blood cell production. Dysregulation of this pathway has been implicated in various hematopoietic disorders and cancers, making the EPO-R Phospho-Tyr368 Colorimetric Cell-Based ELISA Kit an invaluable tool for understanding the role of EPO-R phosphorylation in these diseases.
With its easy-to-use protocol and reliable performance, this kit is suitable for a wide range of applications in basic research, drug discovery, and clinical diagnostics. Researchers can trust the accuracy and reproducibility of results obtained using the EPO-R Phospho-Tyr368 Colorimetric Cell-Based ELISA Kit, making it an essential addition to their experimental toolkit.
| Product Name: | Epo-R (Phospho-Tyr368)Colorimetric Cell-Based ELISA Kit |
| Product Code: | CBCAB00048 |
| ELISA Type: | Cell-Based |
| Target: | Epo-R (Phospho-Tyr368) |
| Reactivity: | Human, Mouse, Rat |
| Dynamic Range: | > 5000 Cells |
| Detection Method: | Colorimetric 450 nm |
| Format: | 2 x 96-Well Microplates |
The Epo-R (Phospho-Tyr368) Colorimetric Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can detect Epo-R protein phosphorylation and expression profile in cells. The kit can be used for measuring the relative amounts of phosphorylated Epo-R in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on Epo-R phosphorylation.
Qualitative determination of Epo-R (Phospho-Tyr368) concentration is achieved by an indirect ELISA format. In essence, Epo-R (Phospho-Tyr368) is captured by Epo-R (Phospho-Tyr368)-specific primary antibodies while the HRP-conjugated secondary antibodies bind the Fc region of the primary antibody. Through this binding, the HRP enzyme conjugated to the secondary antibody can catalyze a colorimetric reaction upon substrate addition. Due to the qualitative nature of the Cell-Based ELISA, multiple normalization methods are needed:
| 1. | A monoclonal antibody specific for human GAPDH is included to serve as an internal positive control in normalizing the target absorbance values. |
| 2. | Following the colorimetric measurement of HRP activity via substrate addition, the Crystal Violet whole-cell staining method may be used to determine cell density. After staining, the results can be analysed by normalizing the absorbance values to cell amounts, by which the plating difference can be adjusted. |
| Database Information: | Gene ID: 2057, UniProt ID: P19235, OMIM: 133100/133171, Unigene: Hs.631624 |
| Gene Symbol: | EPOR |
| Sub Type: | Phospho |
| UniProt Protein Function: | EPOR: erythropoietin receptor: a member of the cytokine receptor family. Mediates erythropoietin-induced erythroblast proliferation, differentiation and survival. Upon EPO stimulation, EPOR dimerizes triggering the JAK2/STAT5 signaling cascade. In some cell types, can also activate STAT1 and STAT3. Forms homodimers on EPO stimulation. Tyrosine-phosphorylated EpoR may bind several SH2 domain-containing proteins including LYN, the adapter protein APS, SHP-1, SHP-2, JAK2, PI3 kinases, STAT5A/B, SOCS3, and CRKL. Defects in the erythropoietin receptor may produce erythroleukemia and familial erythrocytosis. Three alternatively-spliced isoforms have been described. Isoform EPOR-T, missing the cytoplasmic tail, acts as a dominant-negative receptor of EPOR-mediated signaling. |
| UniProt Protein Details: | Protein type:Receptor, cytokine; Membrane protein, integral Chromosomal Location of Human Ortholog: 19p13.3-p13.2 Cellular Component: integral to plasma membrane Molecular Function:erythropoietin receptor activity; identical protein binding; protein binding Disease: Erythrocytosis, Familial, 1 |
| NCBI Summary: | This gene encodes the erythropoietin receptor which is a member of the cytokine receptor family. Upon erythropoietin binding, this receptor activates Jak2 tyrosine kinase which activates different intracellular pathways including: Ras/MAP kinase, phosphatidylinositol 3-kinase and STAT transcription factors. The stimulated erythropoietin receptor appears to have a role in erythroid cell survival. Defects in the erythropoietin receptor may produce erythroleukemia and familial erythrocytosis. Dysregulation of this gene may affect the growth of certain tumors. Alternate splicing results in multiple transcript variants.[provided by RefSeq, May 2010] |
| UniProt Code: | P19235 |
| NCBI GenInfo Identifier: | 119524 |
| NCBI Gene ID: | 2057 |
| NCBI Accession: | P19235.1 |
| UniProt Secondary Accession: | P19235,Q15443, Q2M205, B2RCG4, |
| UniProt Related Accession: | P19235 |
| Molecular Weight: | 35,809 Da |
| NCBI Full Name: | Erythropoietin receptor |
| NCBI Synonym Full Names: | erythropoietin receptor |
| NCBI Official Symbol: | EPORÂ Â |
| NCBI Official Synonym Symbols: | EPO-RÂ Â |
| NCBI Protein Information: | erythropoietin receptor |
| UniProt Protein Name: | Erythropoietin receptor |
| Protein Family: | Erythropoietin receptor |
| UniProt Gene Name: | EPORÂ Â |
| UniProt Entry Name: | EPOR_HUMAN |
| Component | Quantity |
| 96-Well Cell Culture Clear-Bottom Microplate | 2 plates |
| 10X TBS | 24 mL |
| Quenching Buffer | 24 mL |
| Blocking Buffer | 50 mL |
| 15X Wash Buffer | 50 mL |
| Primary Antibody Diluent | 12 mL |
| 100x Anti-Phospho Target Antibody | 60 µL |
| 100x Anti-Target Antibody | 60 µL |
| Anti-GAPDH Antibody | 60 µL |
| HRP-Conjugated Anti-Rabbit IgG Antibody | 12 mL |
| HRP-Conjugated Anti-Mouse IgG Antibody | 12 mL |
| SDS Solution | 12 mL |
| Stop Solution | 24 mL |
| Ready-to-Use Substrate | 12 mL |
| Crystal Violet Solution | 12 mL |
| Adhesive Plate Seals | 2 seals |
The following materials and/or equipment are NOT provided in this kit but are necessary to successfully conduct the experiment:
- Microplate reader able to measure absorbance at 450 nm and/or 595 nm for Crystal Violet Cell Staining (Optional)
- Micropipettes with capability of measuring volumes ranging from 1 µL to 1 ml
- 37% formaldehyde (Sigma Cat# F-8775) or formaldehyde from other sources
- Squirt bottle, manifold dispenser, multichannel pipette reservoir or automated microplate washer
- Graph paper or computer software capable of generating or displaying logarithmic functions
- Absorbent papers or vacuum aspirator
- Test tubes or microfuge tubes capable of storing ≥1 ml
- Poly-L-Lysine (Sigma Cat# P4832 for suspension cells)
- Orbital shaker (optional)
- Deionized or sterile water
*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
| Step | Procedure |
| 1. | Seed 200 µL of 20,000 adherent cells in culture medium in each well of a 96-well plate. The plates included in the kit are sterile and treated for cell culture. For suspension cells and loosely attached cells, coat the plates with 100 µL of 10 µg/ml Poly-L-Lysine (not included) to each well of a 96-well plate for 30 minutes at 37°C prior to adding cells. |
| 2. | Incubate the cells for overnight at 37°C, 5% CO2. |
| 3. | Treat the cells as desired. |
| 4. | Remove the cell culture medium and rinse with 200 µL of 1x TBS, twice. |
| 5. | Fix the cells by incubating with 100 µL of Fixing Solution for 20 minutes at room temperature. The 4% formaldehyde is used for adherent cells and 8% formaldehyde is used for suspension cells and loosely attached cells. |
| 6. | Remove the Fixing Solution and wash the plate 3 times with 200 µL 1x Wash Buffer for five minutes each time with gentle shaking on the orbital shaker. The plate can be stored at 4°C for a week. |
| 7. | Add 100 µL of Quenching Buffer and incubate for 20 minutes at room temperature. |
| 8. | Wash the plate 3 times with 1x Wash Buffer for 5 minutes each time. |
| 9. | Add 200 µL of Blocking Buffer and incubate for 1 hour at room temperature. |
| 10. | Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time. |
| 11. | Add 50 µL of 1x primary antibodies Anti-Epo-R (Phospho-Tyr368) Antibody, Anti-Epo-R Antibody and/or Anti-GAPDH Antibody) to the corresponding wells, cover with Parafilm and incubate for 16 hours (overnight) at 4°C. If the target expression is known to be high, incubate for 2 hours at room temperature. |
| 12. | Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time. |
| 13. | Add 50 µL of 1x secondary antibodies (HRP-Conjugated AntiRabbit IgG Antibody or HRP-Conjugated Anti-Mouse IgG Antibody) to corresponding wells and incubate for 1.5 hours at room temperature. |
| 14. | Wash 3 times with 200 µL of 1x Wash Buffer for 5 minutes each time. |
| 15. | Add 50 µL of Ready-to-Use Substrate to each well and incubate for 30 minutes at room temperature in the dark. |
| 16. | Add 50 µL of Stop Solution to each well and read OD at 450 nm immediately using the microplate reader. |
(Additional Crystal Violet staining may be performed if desired – details of this may be found in the kit technical manual.)
