Description
VASP (Phospho-Ser238)Colorimetric Cell-Based ELISA Kit
The VASP Phospho-Ser238 Colorimetric Cell-Based ELISA Kit is a cutting-edge tool for detecting VASP phosphorylated at serine 238 in cell lysates. This kit offers high sensitivity and specificity, allowing for precise and reproducible results in a variety of research applications.Phosphorylation of VASP at serine 238 is a key signaling event involved in regulating actin dynamics and cell migration. Dysfunction in VASP phosphorylation can contribute to diseases such as cancer, cardiovascular disorders, and neurological conditions, making this kit an invaluable resource for studying these diseases and developing novel therapeutic strategies.
With easy-to-follow protocols and quick assay times, the VASP Phospho-Ser238 Colorimetric Cell-Based ELISA Kit is a must-have tool for researchers looking to investigate the role of VASP phosphorylation in cellular processes and disease pathology.
| Product Name: | VASP (Phospho-Ser238)Colorimetric Cell-Based ELISA Kit |
| Product Code: | CBCAB01619 |
| ELISA Type: | Cell-Based |
| Target: | VASP (Phospho-Ser238) |
| Reactivity: | Human, Mouse, Rat |
| Dynamic Range: | > 5000 Cells |
| Detection Method: | Colorimetric 450 nm |
| Format: | 2 x 96-Well Microplates |
The VASP (Phospho-Ser238) Colorimetric Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can detect VASP protein phosphorylation and expression profile in cells. The kit can be used for measuring the relative amounts of phosphorylated VASP in cultured cells as well as screening for the effects that various treatments, inhibitors (ie. siRNA or chemicals), or activators have on VASP phosphorylation.
Qualitative determination of VASP (Phospho-Ser238) concentration is achieved by an indirect ELISA format. In essence, VASP (Phospho-Ser238) is captured by VASP (Phospho-Ser238)-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: 7408, UniProt ID: P50552, OMIM: 601703, Unigene: Hs.515469 |
| Gene Symbol: | VASP |
| Sub Type: | Phospho |
| UniProt Protein Function: | VASP: vasodilator-stimulated phosphoprotein. Actin- and profilin-binding microfilament-associated protein. The phosphorylation of VASP is dynamically regulated by cellular adhesion to extracellular matrix. |
| UniProt Protein Details: | Protein type:Cytoskeletal; Motility/polarity/chemotaxis Chromosomal Location of Human Ortholog: 19q13.32 Cellular Component: filopodium membrane; tight junction; focal adhesion; cytoplasm; plasma membrane; cytosol; actin cytoskeleton Molecular Function:protein binding; actin binding; SH3 domain binding; profilin binding Biological Process: axon guidance; positive regulation of actin filament polymerization; actin polymerization and/or depolymerization; neural tube closure; T cell receptor signaling pathway; protein homotetramerization |
| NCBI Summary: | Vasodilator-stimulated phosphoprotein (VASP) is a member of the Ena-VASP protein family. Ena-VASP family members contain an EHV1 N-terminal domain that binds proteins containing E/DFPPPPXD/E motifs and targets Ena-VASP proteins to focal adhesions. In the mid-region of the protein, family members have a proline-rich domain that binds SH3 and WW domain-containing proteins. Their C-terminal EVH2 domain mediates tetramerization and binds both G and F actin. VASP is associated with filamentous actin formation and likely plays a widespread role in cell adhesion and motility. VASP may also be involved in the intracellular signaling pathways that regulate integrin-extracellular matrix interactions. VASP is regulated by the cyclic nucleotide-dependent kinases PKA and PKG. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P50552 |
| NCBI GenInfo Identifier: | 1718079 |
| NCBI Gene ID: | 7408 |
| NCBI Accession: | P50552.3 |
| UniProt Secondary Accession: | P50552,Q6PIZ1, Q93035, B2RBT9, |
| UniProt Related Accession: | P50552 |
| Molecular Weight: | 380 |
| NCBI Full Name: | Vasodilator-stimulated phosphoprotein |
| NCBI Synonym Full Names: | vasodilator-stimulated phosphoprotein |
| NCBI Official Symbol: | VASPÂ Â |
| NCBI Protein Information: | vasodilator-stimulated phosphoprotein |
| UniProt Protein Name: | Vasodilator-stimulated phosphoprotein |
| Protein Family: | Vasodilator-stimulated phosphoprotein |
| UniProt Gene Name: | VASPÂ Â |
| UniProt Entry Name: | VASP_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-VASP (Phospho-Ser238) Antibody, Anti-VASP 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.)
