Human OAS2 / 2'-5'-oligoadenylate synthase 2 ELISA Kit
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- SKU:
- HUFI00779
- Product Type:
- ELISA Kit
- Size:
- 96 Assays
- Uniprot:
- P29728
- Sensitivity:
- 0.188ng/ml
- Range:
- 0.313-20ng/ml
- ELISA Type:
- Competitive ELISA, Coated with Antigen
- Synonyms:
- OAS2, p69 OAS, p71 OAS,, 2-5'oligo, A synthase 2, 2-5A synthase 2
- Reactivity:
- Human
Frequently bought together:
Description
Human OAS2 / 2'-5'-oligoadenylate synthase 2 ELISA Kit
OAS2 is an enzyme that is involved in the regulation of the inflammatory response. It is found in high levels in neutrophils, monocytes, and other cells of the immune system. OAS2 controls inflammation by regulating cytokine production by macrophages and neutrophils through its role as a co-factor for cyclooxygenase-1 (COX-1). It functions in the immune system by regulating leukocyte trafficking to sites of injury or infection. OAS2 is used as a marker for inflammation because it is found at high levels in inflamed tissues.
| Product Name: | Human OAS2 / 2'-5'-oligoadenylate synthase 2 ELISA Kit |
| Product Code: | HUFI00779 |
| Size: | 96 Assays |
| Alias: | OAS2, p69 OAS, p71 OAS, 2-5'oligo, A synthase 2, 2-5A synthase 2 |
| Detection method: | Competitive ELISA, Coated with Antibody |
| Application: | This immunoassay kit allows for the in vitro quantitative determination of Human OAS2 concentrations in serum plasma and other biological fluids. |
| Sensitivity: | 0.188ng/ml |
| Range: | 0.313-20ng/ml |
| Storage: | 4°C for 6 months |
| Note: | For Research Use Only |
| Recovery: | Matrices listed below were spiked with certain level of Human OAS2 and the recovery rates were calculated by comparing the measured value to the expected amount of Human OAS2 in samples. | ||||||||||||||||
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| Linearity: | The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human OAS2 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected. | ||||||||||||||||
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| CV(%): | Intra-Assay: CV<8% Inter-Assay: CV<10% |
| Component | Quantity | Storage |
| ELISA Microplate(Dismountable) | 8×12 strips | 4°C for 6 months |
| Lyophilized Standard | 2 | 4°C/-20°C |
| Sample/Standard Dilution Buffer | 20ml | 4°C |
| Biotin-labeled Antibody(Concentrated) | 60ul | 4°C (Protect from light) |
| Antibody Dilution Buffer | 10ml | 4°C |
| HRP-Streptavidin Conjugate(SABC) | 120ul | 4°C (Protect from light) |
| SABC Dilution Buffer | 10ml | 4°C |
| TMB Substrate | 10ml | 4°C (Protect from light) |
| Stop Solution | 10ml | 4°C |
| Wash Buffer(25X) | 30ml | 4°C |
| Plate Sealer | 5 | - |
Other materials and equipment required:
- Microplate reader with 450 nm wavelength filter
- Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipettetips
- Incubator
- Deionized or distilled water
- Absorbent paper
- Buffer resevoir
| Uniprot | P29728 |
| UniProt Protein Function: | OAS2: Interferon-induced, dsRNA-activated antiviral enzyme which plays a critical role in cellular innate antiviral response. In addition, it may also play a role in other cellular processes such as apoptosis, cell growth, differentiation and gene regulation. Synthesizes higher oligomers of 2'-5'-oligoadenylates (2-5A) from ATP which then bind to the inactive monomeric form of ribonuclease L (RNase L) leading to its dimerization and subsequent activation. Activation of RNase L leads to degradation of cellular as well as viral RNA, resulting in the inhibition of protein synthesis, thus terminating viral replication. Can mediate the antiviral effect via the classical RNase L-dependent pathway or an alternative antiviral pathway independent of RNase L. Belongs to the 2-5A synthase family. 3 isoforms of the human protein are produced by alternative splicing. |
| UniProt Protein Details: | Protein type:EC 2.7.7.84; Transferase Chromosomal Location of Human Ortholog: 12q24.2 Cellular Component: mitochondrion; intracellular membrane-bound organelle; membrane; endoplasmic reticulum; perinuclear region of cytoplasm; cytoplasm; nucleus; cytosol Molecular Function:zinc ion binding; metal ion binding; double-stranded RNA binding; ATP binding; 2'-5'-oligoadenylate synthetase activity Biological Process: cytokine and chemokine mediated signaling pathway; response to virus; RNA catabolic process; nucleobase, nucleoside, nucleotide and nucleic acid metabolic process; protein myristoylation; protein amino acid glycosylation; purine nucleotide biosynthetic process; defense response to virus |
| NCBI Summary: | This gene encodes a member of the 2-5A synthetase family, essential proteins involved in the innate immune response to viral infection. The encoded protein is induced by interferons and uses adenosine triphosphate in 2'-specific nucleotidyl transfer reactions to synthesize 2',5'-oligoadenylates (2-5As). These molecules activate latent RNase L, which results in viral RNA degradation and the inhibition of viral replication. The three known members of this gene family are located in a cluster on chromosome 12. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P29728 |
| NCBI GenInfo Identifier: | 116242687 |
| NCBI Gene ID: | 4939 |
| NCBI Accession: | P29728.3 |
| UniProt Secondary Accession: | P29728,Q6PJ33, Q86XX8, A8K9T1, |
| UniProt Related Accession: | P29728 |
| Molecular Weight: | 719 |
| NCBI Full Name: | 2'-5'-oligoadenylate synthase 2 |
| NCBI Synonym Full Names: | 2'-5'-oligoadenylate synthetase 2, 69/71kDa |
| NCBI Official Symbol: | OAS2 |
| NCBI Protein Information: | 2'-5'-oligoadenylate synthase 2; 2-5A synthase 2; p69 OAS / p71 OAS; (2'-5')oligo(A) synthetase 2 |
| UniProt Protein Name: | 2'-5'-oligoadenylate synthase 2 |
| UniProt Synonym Protein Names: | p69 OAS / p71 OAS; p69OAS / p71OAS |
| Protein Family: | 2'-5'-oligoadenylate synthase |
| UniProt Gene Name: | OAS2 |
| UniProt Entry Name: | OAS2_HUMAN |
*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
Equilibrate the TMB substrate for at least 30 min at 37°C beforeuse. When diluting samples and reagents, they must be mixed completely andevenly. It is recommended to plot a standard curve for each test.
| Step | Protocol |
| 1. | Set standard, test sample and control (zero) wells on the pre-coatedplate respectively, and then, record their positions. It isrecommended to measure each standard and sample in duplicate. Washplate 2 times before adding standard, sample and control (zero) wells! |
| 2. | Add Sample and Biotin-detection antibody: Add 50µL of Standard, Blank or Sample per well. The blankwell is added with Sample Dilution Buffer. Immediately add 50 µL of biotin-labelled antibody workingsolution to each well. Cover with the plate sealer provided. Gently tap the plate to ensure thoroughmixing. Incubate for 45 minutes at 37°C. (Solutions are added to the bottom of micro-ELISA platewell, avoid touching plate walls and foaming). |
| 3. | Wash: Aspirate each well and wash, repeating the process three timesWash by filling each well with Wash Buffer (approximately 350µL)using a squirt bottle, multi-channel pipette, manifold dispenser orautomated washer. Complete removal of liquid at each step is essentialto good performance. After the last wash, remove any remaining WashBuffer by aspirating or decanting. Invert the plate and pat it againstthick clean absorbent paper. |
| 4. | HRP-Streptavidin Conjugate(SABC): Add 100µL of SABC workingsolution to each well. Cover with a new Plate sealer. Incubate for30minutes at 37°C. |
| 5. | Wash: Repeat the aspiration/wash process for five times. |
| 6. | TMB Substrate: Add 90µL of TMB Substrate to each well. Coverwith a new Plate sealer. Incubate for about 10-20 minutes at 37°C.Protect from light. The reaction time can be shortened or extendedaccording to the actual color change, but not more than 30minutes.When apparent gradient appeared in standard wells, you can terminatethe reaction. |
| 7. | Stop: Add 50µL of Stop Solution to each well. Color turn toyellow immediately. The adding order of stop solution should be as thesame as the substrate solution. |
| 8. | OD Measurement: Determine the optical density (OD Value) of each wellat once, using a microplate reader set to 450 nm. You should open themicroplate reader ahead, preheat the instrument, and set the testing parameters. |
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. |
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