Description
Human Tyrosine-protein kinase CSK (CSK) ELISA Kit
The Human Tyrosine Protein Kinase CSK ELISA Kit is specifically designed for the precise and accurate measurement of tyrosine protein kinase CSK levels in human serum, plasma, and cell culture supernatants. This kit offers exceptional sensitivity and specificity, ensuring dependable and consistent results for various research applications.Tyrosine protein kinase CSK is a key enzyme that plays a vital role in regulating cell growth, differentiation, and immune response. Dysregulation of CSK activity has been implicated in various diseases, including cancer and autoimmune disorders, highlighting its importance as a potential therapeutic target and biomarker.
By utilizing the Human Tyrosine Protein Kinase CSK ELISA Kit, researchers can gain valuable insights into the role of CSK in disease progression and develop novel strategies for treatment. With its reliable performance and user-friendly design, this kit is an essential tool for advancing scientific discoveries in the field of molecular biology and medicine.
| Product Name: | Human Tyrosine-protein kinase CSK (CSK) ELISA Kit |
| SKU: | HUEB1240 |
| Size: | 96T |
| Target: | Human Tyrosine-protein kinase CSK (CSK) |
| Synonyms: | C-Src kinase, Protein-tyrosine kinase CYL |
| Assay Type: | Sandwich |
| Detection Method: | ELISA |
| Reactivity: | Human |
| Detection Range: | 0.78-50ng/mL |
| Sensitivity: | 0.43ng/ml |
| Intra CV: | 4.6% | ||||||||||||||||||||
| Inter CV: | 8.3% | ||||||||||||||||||||
| Linearity: |
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| Recovery: |
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| Function: | Non-receptor tyrosine-protein kinase that plays an important role in the regulation of cell growth, differentiation, migration and immune response. Phosphorylates tyrosine residues located in the C-terminal tails of Src-family kinases (SFKs) including LCK, SRC, HCK, FYN, LYN or YES1. Upon tail phosphorylation, Src-family members engage in intramolecular interactions between the phosphotyrosine tail and the SH2 domain that result in an inactive conformation. To inhibit SFKs, CSK is recruited to the plasma membrane via binding to transmembrane proteins or adapter proteins located near the plasma membrane. Suppresses signaling by various surface receptors, including T-cell receptor (TCR) and B-cell receptor (BCR) by phosphorylating and maintaining inactive several positive effectors such as FYN or LCK. |
| Uniprot: | P41240 |
| Sample Type: | Serum, plasma, tissue homogenates, cell culture supernates and other biological fluids |
| Specificity: | Natural and recombinant human Tyrosine-protein kinase CSK |
| Sub Unit: | Homodimer (via SH3-domain) (PubMed:19888460). Interacts with PTPN22 (PubMed:15208781). Interacts with phosphorylated SIT1, PAG1, LIME1 and TGFB1I1; these interactions serve to recruit CSK to the membrane where it can phosphorylate and inhibit Src-family kinases (PubMed:11433379, PubMed:10790433, PubMed:14610046, PubMed:10838081). Interacts with SRCIN1 (PubMed:17525734). Interacts with RHOH (PubMed:20851766). Interacts (via SH2 domain) with SCIMP (PubMed:21930792). |
| Research Area: | Signal Transduction |
| Subcellular Location: | Cytoplasm Cell membrane Mainly cytoplasmic, also present in lipid rafts. |
| Storage: | Please see kit components below for exact storage details |
| Note: | For research use only |
| UniProt Protein Function: | CSK: a tyrosine kinase of the Csk family that phosphorylates and inhibits Src family kinases. Specifically phosphorylates Y504 on LCK, which acts as a negative regulatory site. Csk and the phospho-tyrosine phosphatase CD45 reciprocally regulate phosphorylation of the inhibitory tyrosine of the Src family kinases Lck and Fyn during T-cell receptor mediated signaling during thymic development. |
| UniProt Protein Details: | Protein type:Protein kinase, tyrosine (non-receptor); EC 2.7.10.2; Protein kinase, TK; Kinase, protein; TK group; Csk family Chromosomal Location of Human Ortholog: 15q24.1 Cellular Component: cytoplasm; cytosol; extrinsic to internal side of plasma membrane; plasma membrane Molecular Function:identical protein binding; kinase activity; non-membrane spanning protein tyrosine kinase activity; protein binding; protein C-terminus binding; protein-tyrosine kinase activity; receptor binding Biological Process: cell differentiation; cell migration; central nervous system development; epidermal growth factor receptor signaling pathway; innate immune response; negative regulation of Golgi to plasma membrane protein transport; protein amino acid phosphorylation; regulation of cell proliferation; regulation of cytokine production; T cell costimulation; T cell receptor signaling pathway; transmembrane receptor protein tyrosine kinase signaling pathway |
| UniProt Code: | P41240 |
| NCBI GenInfo Identifier: | 729887 |
| NCBI Gene ID: | 1445 |
| NCBI Accession: | P41240.1 |
| UniProt Secondary Accession: | P41240,Q2M3N2, Q6FGZ6, |
| UniProt Related Accession: | P41240 |
| Molecular Weight: | 50,704 Da |
| NCBI Full Name: | Tyrosine-protein kinase CSK |
| NCBI Synonym Full Names: | c-src tyrosine kinase |
| NCBI Official Symbol: | CSK |
| NCBI Protein Information: | tyrosine-protein kinase CSK |
| UniProt Protein Name: | Tyrosine-protein kinase CSK |
| UniProt Synonym Protein Names: | C-Src kinase; Protein-tyrosine kinase CYL |
| Protein Family: | Chloroplast sensor kinase |
| UniProt Gene Name: | CSK |
| UniProt Entry Name: | CSK_HUMAN |
| Component | Quantity (96 Assays) | Storage |
| ELISA Microplate (Dismountable) | 8×12 strips | -20°C |
| Lyophilized Standard | 2 | -20°C |
| Sample Diluent | 20ml | -20°C |
| Assay Diluent A | 10mL | -20°C |
| Assay Diluent B | 10mL | -20°C |
| Detection Reagent A | 120µL | -20°C |
| Detection Reagent B | 120µL | -20°C |
| Wash Buffer | 30mL | 4°C |
| Substrate | 10mL | 4°C |
| Stop Solution | 10mL | 4°C |
| Plate Sealer | 5 | - |
Other materials and equipment required:
- Microplate reader with 450 nm wavelength filter
- Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipette tips
- Incubator
- Deionized or distilled water
- Absorbent paper
- Buffer resevoir
*Note: The below protocol is a sample protocol. Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
Allow all reagents to reach room temperature (Please do not dissolve the reagents at 37°C directly). All the reagents should be mixed thoroughly by gently swirling before pipetting. Avoid foaming. Keep appropriate numbers of strips for 1 experiment and remove extra strips from microtiter plate. Removed strips should be resealed and stored at -20°C until the kits expiry date. Prepare all reagents, working standards and samples as directed in the previous sections. Please predict the concentration before assaying. If values for these are not within the range of the standard curve, users must determine the optimal sample dilutions for their experiments. We recommend running all samples in duplicate.
| Step | |
| 1. | Add Sample: Add 100µL of Standard, Blank, or Sample per well. The blank well is added with Sample diluent. Solutions are added to the bottom of micro ELISA plate well, avoid inside wall touching and foaming as possible. Mix it gently. Cover the plate with sealer we provided. Incubate for 120 minutes at 37°C. |
| 2. | Remove the liquid from each well, don't wash. Add 100µL of Detection Reagent A working solution to each well. Cover with the Plate sealer. Gently tap the plate to ensure thorough mixing. Incubate for 1 hour at 37°C. Note: if Detection Reagent A appears cloudy warm to room temperature until solution is uniform. |
| 3. | Aspirate each well and wash, repeating the process three times. Wash by filling each well with Wash Buffer (approximately 400µL) (a squirt bottle, multi-channel pipette,manifold dispenser or automated washer are needed). Complete removal of liquid at each step is essential. After the last wash, completely remove remaining Wash Buffer by aspirating or decanting. Invert the plate and pat it against thick clean absorbent paper. |
| 4. | Add 100µL of Detection Reagent B working solution to each well. Cover with the Plate sealer. Incubate for 60 minutes at 37°C. |
| 5. | Repeat the wash process for five times as conducted in step 3. |
| 6. | Add 90µL of Substrate Solution to each well. Cover with a new Plate sealer and incubate for 10-20 minutes at 37°C. Protect the plate from light. The reaction time can be shortened or extended according to the actual color change, but this should not exceed more than 30 minutes. When apparent gradient appears in standard wells, user should terminatethe reaction. |
| 7. | Add 50µL of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing. |
| 8. | Determine the optical density (OD value) of each well at once, using a micro-plate reader set to 450 nm. User should open the micro-plate reader in advance, preheat the instrument, and set the testing parameters. |
| 9. | After experiment, store all reagents according to the specified storage temperature respectively until their expiry. |
When carrying out an ELISA assay it is important to prepare your samples in order to achieve the best possible results. Below we have a list of procedures for the preparation of samples for different sample types.
| Sample Type | Protocol |
| Serum | If using serum separator tubes, allow samples to clot for 30 minutes at room temperature. Centrifuge for 10 minutes at 1,000x g. Collect the serum fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. If serum separator tubes are not being used, allow samples to clot overnight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Remove serum and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. |
| Plasma | Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples at 4°C for 15 mins at 1000 × g within 30 mins of collection. Collect the plasma fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. Note: Over haemolysed samples are not suitable for use with this kit. |
| Urine & Cerebrospinal Fluid | Collect the urine (mid-stream) in a sterile container, centrifuge for 20 mins at 2000-3000 rpm. Remove supernatant and assay immediately. If any precipitation is detected, repeat the centrifugation step. A similar protocol can be used for cerebrospinal fluid. |
| Cell culture supernatant | Collect the cell culture media by pipette, followed by centrifugation at 4°C for 20 mins at 1500 rpm. Collect the clear supernatant and assay immediately. |
| Cell lysates | Solubilize cells in lysis buffer and allow to sit on ice for 30 minutes. Centrifuge tubes at 14,000 x g for 5 minutes to remove insoluble material. Aliquot the supernatant into a new tube and discard the remaining whole cell extract. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C. |
| Tissue homogenates | The preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenize in 20ml of 1X PBS (including protease inhibitors) and store overnight at ≤ -20°C. Two freeze-thaw cycles are required to break the cell membranes. To further disrupt the cell membranes you can sonicate the samples. Centrifuge homogenates for 5 mins at 5000xg. Remove the supernatant and assay immediately or aliquot and store at -20°C or -80°C. |
| Tissue lysates | Rinse tissue with PBS, cut into 1-2 mm pieces, and homogenize with a tissue homogenizer in PBS. Add an equal volume of RIPA buffer containing protease inhibitors and lyse tissues at room temperature for 30 minutes with gentle agitation. Centrifuge to remove debris. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C. |
| Breast Milk | Collect milk samples and centrifuge at 10,000 x g for 60 min at 4°C. Aliquot the supernatant and assay. For long term use, store samples at -80°C. Minimize freeze/thaw cycles. |
