Description
C-RAF (Phospho-Ser338)Colorimetric Cell-Based ELISA Kit
The c-Raf Phospho-Ser338 Colorimetric Cell-Based ELISA Kit is a powerful tool for studying the phosphorylation of c-Raf at serine 338 in cell samples. This kit allows for accurate and sensitive detection of phosphorylated c-Raf levels, providing researchers with valuable insights into the signaling pathways involved in cellular processes.Phosphorylation of c-Raf at serine 338 is known to play a key role in the regulation of cell proliferation, differentiation, and survival. Dysregulation of this phosphorylation event has been implicated in various diseases, including cancer, making it an important target for drug development and biomarker discovery.
With its high sensitivity and specificity, this ELISA kit offers reliable and reproducible results, making it suitable for a wide range of experimental applications. By utilizing this kit, researchers can gain a deeper understanding of the molecular mechanisms underlying cellular processes and potentially uncover new therapeutic strategies for treating diseases associated with c-Raf dysregulation.
| Product Name: | C-RAF (Phospho-Ser338)Colorimetric Cell-Based ELISA Kit |
| Product Code: | CBCAB01602 |
| ELISA Type: | Cell-Based |
| Target: | C-RAF (Phospho-Ser338) |
| Reactivity: | Human, Mouse, Rat |
| Dynamic Range: | > 5000 Cells |
| Detection Method: | Colorimetric 450 nm |
| Format: | 2 x 96-Well Microplates |
The C-RAF (Phospho-Ser338) Colorimetric Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can detect C-RAF protein phosphorylation and expression profile in cells. The kit can be used for measuring the relative amounts of phosphorylated C-RAF in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on C-RAF phosphorylation.
Qualitative determination of C-RAF (Phospho-Ser338) concentration is achieved by an indirect ELISA format. In essence, C-RAF (Phospho-Ser338) is captured by C-RAF (Phospho-Ser338)-specific primary (1ø) antibodies while the HRP-conjugated secondary (2ø) antibodies bind the Fc region of the 1ø antibody. Through this binding, the HRP enzyme conjugated to the 2ø 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: 5894, UniProt ID: P04049, OMIM: 164760/611553/611554, Unigene: Hs.159130 |
| Gene Symbol: | RAF1 |
| Sub Type: | Phospho |
| UniProt Protein Function: | RAF1: a proto-oncogenic TKL kinase of the RAF family. Functions downstream of the Ras family of membrane associated GTPases to which it binds directly. Once activated Raf-1 can phosphorylate and activate MEK1/2, which in turn phosphorylate and activate ERK1/2. Acts as a regulatory link between the membrane-associated Ras GTPases and the MAPK/ERK cascade, and this critical regulatory link functions as a switch determining cell fate decisions including proliferation, differentiation, apoptosis, survival and oncogenic transformation. RAF1 activation initiates a mitogen-activated protein kinase (MAPK) cascade that comprises a sequential phosphorylation of the dual-specific MAPK kinases (MEK1/2) and the extracellular signal-regulated kinases (ERK1/2). RAF1, subsequent to phosphorylation by PAK1, phosphorylates BAD (Bcl2-antagonist of cell death) at S75. Phosphorylates adenylyl cyclases ADCY2, ADCY5 and ADCY6, resulting in their activation. Phosphorylates PPP1R12A resulting in inhibition of the phosphatase activity. Phosphorylates TNNT2 (cardiac muscle troponin T). Can promote NF-kB activation and inhibit signal transducers involved in motility (ROCK2), apoptosis (ASK1 and MST2), proliferation and angiogenesis (RB1). Can protect cells from apoptosis also by translocating to the mitochondria where it binds BCL2 and displaces BAD. Restricts caspase activation in response to selected stimuli, notably Fas stimulation, pathogen-mediated macrophage apoptosis, and erythroid differentiation. |
| UniProt Protein Details: | Protein type:EC 2.7.11.1; Protein kinase, Ser/Thr (non-receptor); Oncoprotein; Kinase, protein; Protein kinase, TKL; TKL group; RAF family Chromosomal Location of Human Ortholog: 3p25 Cellular Component: Golgi apparatus; mitochondrial outer membrane; cytoplasm; plasma membrane; pseudopodium; nucleus; cytosol Molecular Function:small GTPase binding; protein serine/threonine kinase activity; identical protein binding; protein binding; MAP kinase kinase kinase activity; mitogen-activated protein kinase kinase binding; protein heterodimerization activity; metal ion binding; ATP binding; protein kinase activity Biological Process: axon guidance; nerve growth factor receptor signaling pathway; activation of MAPKK activity; wound healing; apoptosis; somatic stem cell maintenance; heart development; intermediate filament cytoskeleton organization and biogenesis; negative regulation of caspase activity; signal transduction; protein amino acid phosphorylation; regulation of apoptosis; negative regulation of cell proliferation; synaptic transmission; small GTPase mediated signal transduction; regulation of cell differentiation; transmembrane transport; epidermal growth factor receptor signaling pathway; platelet activation; fibroblast growth factor receptor signaling pathway; adenylate cyclase activation; MAPKKK cascade; positive regulation of peptidyl-serine phosphorylation; cell proliferation; Ras protein signal transduction; response to hypoxia; regulation of Rho protein signal transduction; insulin receptor signaling pathway; innate immune response; vascular endothelial growth factor receptor signaling pathway; blood coagulation; negative regulation of protein complex assembly; negative regulation of apoptosis Disease: Cardiomyopathy, Dilated, 1nn; Noonan Syndrome 5; Leopard Syndrome 2 |
| NCBI Summary: | This gene is the cellular homolog of viral raf gene (v-raf). The encoded protein is a MAP kinase kinase kinase (MAP3K), which functions downstream of the Ras family of membrane associated GTPases to which it binds directly. Once activated, the cellular RAF1 protein can phosphorylate to activate the dual specificity protein kinases MEK1 and MEK2, which in turn phosphorylate to activate the serine/threonine specific protein kinases, ERK1 and ERK2. Activated ERKs are pleiotropic effectors of cell physiology and play an important role in the control of gene expression involved in the cell division cycle, apoptosis, cell differentiation and cell migration. Mutations in this gene are associated with Noonan syndrome 5 and LEOPARD syndrome 2. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P04049 |
| NCBI GenInfo Identifier: | 125651 |
| NCBI Gene ID: | 5894 |
| NCBI Accession: | P04049.1 |
| UniProt Secondary Accession: | P04049,Q15278, Q9UC20, B0LPH8, B2R5N3, |
| UniProt Related Accession: | P04049 |
| Molecular Weight: | 648 |
| NCBI Full Name: | RAF proto-oncogene serine/threonine-protein kinase |
| NCBI Synonym Full Names: | Raf-1 proto-oncogene, serine/threonine kinase |
| NCBI Official Symbol: | RAF1 |
| NCBI Official Synonym Symbols: | NS5; CRAF; Raf-1; c-Raf; CMD1NN |
| NCBI Protein Information: | RAF proto-oncogene serine/threonine-protein kinase; Oncogene RAF1; proto-oncogene c-RAF; C-Raf proto-oncogene, serine/threonine kinase; v-raf-1 murine leukemia viral oncogene homolog 1; raf proto-oncogene serine/threonine protein kinase |
| UniProt Protein Name: | RAF proto-oncogene serine/threonine-protein kinase |
| UniProt Synonym Protein Names: | Proto-oncogene c-RAF; cRaf; Raf-1 |
| Protein Family: | Rik1-associated factor |
| UniProt Gene Name: | RAF1 |
| UniProt Entry Name: | RAF1_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-C-RAF (Phospho-Ser338) Antibody, Anti-C-RAF 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.)
