Description
Human HSPA5/GRP78/BiP ELISA Kit
The Human HSPA5 (GRP78/BiP) ELISA Kit is specifically designed for the accurate measurement of HSPA5 levels in human serum, plasma, and cell culture supernatants. This kit offers high sensitivity and specificity, ensuring dependable and consistent results for a variety of research applications.HSPA5, also known as GRP78/BiP, is a critical protein involved in protein folding and endoplasmic reticulum stress response. It serves as a key regulator of cellular homeostasis and is implicated in various diseases including cancer, diabetes, and neurodegenerative disorders.
Therefore, measuring HSPA5 levels can provide valuable insights into disease mechanisms and potential therapeutic targets.The Human HSPA5 (GRP78/BiP) ELISA Kit is a valuable tool for researchers looking to study the role of HSPA5 in disease progression and develop novel treatment strategies. Its reliable performance and ease of use make it an essential component of any laboratory focused on understanding cellular stress and protein folding pathways.
| Product Name: | Human HSPA5/GRP78/BiP ELISA Kit |
| Product Code: | HUFI01500 |
| Size: | 96 Assays |
| Alias: | GRP78, Glucose Regulated Protein 78, HSPA5, BIP, GRP-78, HSP70-5, MIF2, 78 kDa glucose-regulated protein, Endoplasmic reticulum lumenal Ca, 2+-binding protein grp78, Heat shock 70 kDa protein 5, heat shock 70kD protein 5, glucose-regulated protein, 78kD, Immunoglobulin heavy chain-binding protein |
| Detection method: | Sandwich ELISA, Double Antibody |
| Application: | This immunoassay kit allows for the in vitro quantitative determination of Human HSPA5 concentrations in serum plasma and other biological fluids. |
| Sensitivity: | 0.375ng/ml |
| Range: | 0.625-40ng/ml |
| Storage: | 4°C for 6 months |
| Note: | For Research Use Only |
| Recovery: | Matrices listed below were spiked with certain level of Human HSPA5 and the recovery rates were calculated by comparing the measured value to the expected amount of Human HSPA5 in samples. | ||||||||||||||||
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| Linearity: | The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human HSPA5 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) | 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 | P11021 |
| UniProt Protein Function: | GRP78: a member of the HSP family of molecular chaperones required for endoplasmic reticulum integrity and stress-induced autophagy. Plays a central role in regulating the unfolded protein response (UPR), and is an obligatory component of autophagy in mammalian cells. May play an important role in cellular adaptation and oncogenic survival. One of the client proteins of GRP78 is protein double-stranded RNA-activated protein-like endoplasmic reticulum kinase (PERK). Probably plays a role in facilitating the assembly of multimeric protein complexes inside the ER. |
| UniProt Protein Details: | Protein type:Chaperone; Heat shock protein Chromosomal Location of Human Ortholog: 9q33.3 Cellular Component: signalosome; endoplasmic reticulum membrane; focal adhesion; smooth endoplasmic reticulum; cell surface; mitochondrion; endoplasmic reticulum; endoplasmic reticulum lumen; ER-Golgi intermediate compartment; membrane; melanosome; plasma membrane; integral to endoplasmic reticulum membrane; midbody; nucleus Molecular Function:protein domain specific binding; protein binding; enzyme binding; chaperone binding; ubiquitin protein ligase binding; unfolded protein binding; ATPase activity; ribosome binding; calcium ion binding; misfolded protein binding; glycoprotein binding; ATP binding Biological Process: platelet activation; ER-associated protein catabolic process; cerebellum structural organization; unfolded protein response; cerebellar Purkinje cell layer development; cellular response to glucose starvation; platelet degranulation; substantia nigra development; cellular protein metabolic process; unfolded protein response, activation of signaling protein activity; positive regulation of protein ubiquitination; blood coagulation; negative regulation of transforming growth factor beta receptor signaling pathway; ER overload response; positive regulation of cell migration; negative regulation of apoptosis |
| NCBI Summary: | The protein encoded by this gene is a member of the heat shock protein 70 (HSP70) family. It is localized in the lumen of the endoplasmic reticulum (ER), and is involved in the folding and assembly of proteins in the ER. As this protein interacts with many ER proteins, it may play a key role in monitoring protein transport through the cell.[provided by RefSeq, Sep 2010] |
| UniProt Code: | P11021 |
| NCBI GenInfo Identifier: | 14916999 |
| NCBI Gene ID: | 3309 |
| NCBI Accession: | P11021.2 |
| UniProt Secondary Accession: | P11021,Q2EF78, Q9NPF1, Q9UK02, B0QZ61, |
| UniProt Related Accession: | P11021 |
| Molecular Weight: | |
| NCBI Full Name: | 78 kDa glucose-regulated protein |
| NCBI Synonym Full Names: | heat shock 70kDa protein 5 (glucose-regulated protein, 78kDa) |
| NCBI Official Symbol: | HSPA5 |
| NCBI Official Synonym Symbols: | BIP; MIF2; GRP78; HEL-S-89n |
| NCBI Protein Information: | 78 kDa glucose-regulated protein; immunoglobulin heavy chain-binding protein; epididymis secretory sperm binding protein Li 89n; endoplasmic reticulum lumenal Ca(2+)-binding protein grp78 |
| UniProt Protein Name: | 78 kDa glucose-regulated protein |
| UniProt Synonym Protein Names: | Endoplasmic reticulum lumenal Ca(2+)-binding protein grp78; Heat shock 70 kDa protein 5; Immunoglobulin heavy chain-binding protein; BiP |
| UniProt Gene Name: | HSPA5 |
| UniProt Entry Name: | GRP78_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. |
