Description
Human 2, 5-OAS (2, 5-oligoadenylate synthetase) ELISA Kit
The Human 2'5'-Oas-2 5'-Oligoadenylate Synthetase ELISA Kit is a powerful tool for the quantitative measurement of 2'5'-Oas-2 5'-Oligoadenylate Synthetase levels in human samples including serum, plasma, and cell culture supernatants. This kit offers exceptional sensitivity and specificity, ensuring accurate and reproducible results for a variety of research applications.2'5'-Oas-2 5'-Oligoadenylate Synthetase is a key enzyme involved in the immune response against viral infections, playing a critical role in antiviral defense mechanisms. Dysregulation of 2'5'-Oas-2 5'-Oligoadenylate Synthetase has been linked to various diseases including autoimmune disorders, viral infections, and inflammatory conditions, making it a valuable biomarker for the study of these conditions and the development of potential therapeutic interventions.
With its high-performance capabilities, the Human 2'5'-Oas-2 5'-Oligoadenylate Synthetase ELISA Kit is an essential tool for researchers looking to advance their understanding of immune responses and identify novel targets for the treatment of infectious and inflammatory diseases.
| Product Name: | Human 2, 5-OAS (2, 5-oligoadenylate synthetase) ELISA Kit |
| Product Code: | HUFI03088 |
| Size: | 96 Assays |
| Alias: | 2 5oligo, A synthase 2, 2 5 oligoadenylate synthase 2, 2 5A synthase 2, OAS2, p69 OAS, p71 OAS, p69OAS, p71OAS |
| Detection method: | Sandwich ELISA, Double Antibody |
| Application: | This immunoassay kit allows for the in vitro quantitative determination of Human 2, 5-OAS concentrations in serum plasma and other biological fluids. |
| Sensitivity: | 0.281ng/ml |
| Range: | 0.469-30ng/ml |
| Storage: | 4°C for 6 months |
| Note: | For Research Use Only |
| Recovery: | Matrices listed below were spiked with certain level of Human 2, 5-OAS and the recovery rates were calculated by comparing the measured value to the expected amount of Human 2, 5-OAS in samples. Enquire for more information. |
| Linearity: | The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human 2, 5-OAS and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected. Enquire for more information. |
| 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) | 120ul | 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 pipette tips
- Incubator
- Deionized or distilled water
- Absorbent paper
- Buffer resevoir
| Uniprot | P00973 |
| UniProt Protein Function: | OAS1: 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. The secreted form displays antiviral effect against vesicular stomatitis virus (VSV), herpes simplex virus type 2 (HSV-2), and encephalomyocarditis virus (EMCV) and stimulates the alternative antiviral pathway independent of RNase L. Belongs to the 2-5A synthase family. 4 isoforms of the human protein are produced by alternative splicing. |
| UniProt Protein Details: | Protein type:Transferase; EC 2.7.7.84 Chromosomal Location of Human Ortholog: 12q24.2 Cellular Component: mitochondrion; endoplasmic reticulum; cytoplasm; extracellular region; cytosol; nucleus Molecular Function:protein binding; zinc ion binding; metal ion binding; double-stranded RNA binding; ATP binding; 2'-5'-oligoadenylate synthetase activity Biological Process: negative regulation of viral genome replication; response to virus; cytokine and chemokine mediated signaling pathway; glucose metabolic process; purine nucleotide biosynthetic process; glucose homeostasis; defense response to virus; protein oligomerization Disease: Diabetes Mellitus, Insulin-dependent |
| 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. Mutations in this gene have been associated with host susceptibility to viral infection. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P00973 |
| NCBI GenInfo Identifier: | 296439492 |
| NCBI Gene ID: | 4938 |
| NCBI Accession: | P00973.4 |
| UniProt Secondary Accession: | P00973,P04820, P29080, P29081, P78485, P78486, Q16700 Q16701, Q1PG42, Q3ZM01, Q53GC5, A8K4N8, |
| UniProt Related Accession: | P00973 |
| Molecular Weight: | 400 |
| NCBI Full Name: | 2'-5'-oligoadenylate synthase 1 |
| NCBI Synonym Full Names: | 2'-5'-oligoadenylate synthetase 1, 40/46kDa |
| NCBI Official Symbol: | OAS1 |
| NCBI Official Synonym Symbols: | OIAS; IFI-4; OIASI |
| NCBI Protein Information: | 2'-5'-oligoadenylate synthase 1; E18/E16; p46/p42 OAS; 2-5A synthase 1; 2-5A synthetase 1; (2-5')oligo(A) synthase 1; 2',5'-oligo A synthetase 1; (2-5')oligo(A) synthetase 1; 2'-5'-oligoisoadenylate synthetase 1; 2',5'-oligoadenylate synthetase 1, 40/46kDa; 2'-5' oligoadenylate synthetase 1 p48 isoform; 2'-5' oligoadenylate synthetase 1 p52 isoform |
| UniProt Protein Name: | 2'-5'-oligoadenylate synthase 1 |
| UniProt Synonym Protein Names: | E18/E16; p46/p42 OAS |
| Protein Family: | 2'-5'-oligoadenylate synthase |
| UniProt Gene Name: | OAS1 |
| UniProt Entry Name: | OAS1_HUMAN |
*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
Before adding to wells, equilibrate the SABC working solution and TMB substrate for at least 30 min at 37°C. When diluting samples and reagents, they must be mixed completely and evenly. 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-coated plate respectively, and then, record their positions. It is recommended to measure each standard and sample in duplicate. Wash plate 2 times before adding standard, sample and control (zero) wells! |
| 2. | Aliquot 0.1ml standard solutions into the standard wells. |
| 3. | Add 0.1 ml of Sample / Standard dilution buffer into the control (zero) well. |
| 4. | Add 0.1 ml of properly diluted sample ( Human serum, plasma, tissue homogenates and other biological fluids.) into test sample wells. |
| 5. | Seal the plate with a cover and incubate at 37 °C for 90 min. |
| 6. | Remove the cover and discard the plate content, clap the plate on the absorbent filter papers or other absorbent material. Do NOT let the wells completely dry at any time. Wash plate X2. |
| 7. | Add 0.1 ml of Biotin- detection antibody working solution into the above wells (standard, test sample & zero wells). Add the solution at the bottom of each well without touching the side wall. |
| 8. | Seal the plate with a cover and incubate at 37°C for 60 min. |
| 9. | Remove the cover, and wash plate 3 times with Wash buffer. Let wash buffer rest in wells for 1 min between each wash. |
| 10. | Add 0.1 ml of SABC working solution into each well, cover the plate and incubate at 37°C for 30 min. |
| 11. | Remove the cover and wash plate 5 times with Wash buffer, and each time let the wash buffer stay in the wells for 1-2 min. |
| 12. | Add 90 µl of TMB substrate into each well, cover the plate and incubate at 37°C in dark within 10-20 min. (Note: This incubation time is for reference use only, the optimal time should be determined by end user.) And the shades of blue can be seen in the first 3-4 wells (with most concentrated standard solutions), the other wells show no obvious color. |
| 13. | Add 50 µl of Stop solution into each well and mix thoroughly. The color changes into yellow immediately. |
| 14. | Read the O.D. absorbance at 450 nm in a microplate reader immediately after adding the stop solution. |
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. |
