Description
HEXB Colorimetric Cell-Based ELISA
The HEXB Colorimetric Cell-Based ELISA Kit is a cutting-edge assay designed for the quantitative measurement of HEXB levels in cell lysates and tissue samples. This kit offers unparalleled sensitivity and specificity, enabling researchers to obtain accurate and reliable results for their experiments.HEXB, also known as beta-hexosaminidase subunit beta, is an essential enzyme involved in the degradation of glycosphingolipids. Aberrant HEXB expression has been linked to various lysosomal storage disorders and neurodegenerative diseases, highlighting its importance as a potential therapeutic target.
By utilizing the HEXB Colorimetric Cell-Based ELISA Kit, researchers can gain valuable insights into the role of HEXB in cellular processes and disease pathology. This versatile assay can be applied in a variety of research areas, including drug discovery, biomarker identification, and disease mechanism elucidation.
| Product Name: | HEXB Colorimetric Cell-Based ELISA |
| Product Code: | CBCAB00067 |
| ELISA Type: | Cell-Based |
| Target: | HEXB |
| Reactivity: | Human |
| Dynamic Range: | > 5000 Cells |
| Detection Method: | Colorimetric 450 nmStorage/Stability:4°C/6 Months |
| Format: | 96-Well Microplate |
The HEXB Colorimetric Cell-Based ELISA Kit is a convenient, lysate-free, high throughput and sensitive assay kit that can detect HEXB protein expression profile in cells. The kit can be used for measuring the relative amounts of HEXB in cultured cells as well as screening for the effects that various treatments, inhibitors (ie siRNA or chemicals), or activators have on HEXB.
Qualitative determination of HEXB concentration is achieved by an indirect ELISA format. In essence, HEXB is captured by HEXB-specific primary antibodies while the HRP-conjugated secondary antibodies bind the Fc region of the primary antibody. Through this binding, the HRP enzyme conjugated to the secondary 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: 3074, UniProt ID: P07686, OMIM: 268800/606873, Unigene: Hs.69293 |
| Gene Symbol: | HEXB |
| Sub Type: | None |
| UniProt Protein Function: | HEXB: Responsible for the degradation of GM2 gangliosides, and a variety of other molecules containing terminal N-acetyl hexosamines, in the brain and other tissues. Defects in HEXB are the cause of GM2-gangliosidosis type 2 (GM2G2); also known as Sandhoff disease. GM2- gangliosidosis is an autosomal recessive lysosomal storage disease marked by the accumulation of GM2 gangliosides in the neuronal cells. GM2G2 is clinically indistinguishable from GM2- gangliosidosis type 1, presenting startle reactions, early blindness, progressive motor and mental deterioration, macrocephaly and cherry-red spots on the macula. Belongs to the glycosyl hydrolase 20 family. |
| UniProt Protein Details: | Protein type:Carbohydrate Metabolism - amino sugar and nucleotide sugar; EC 3.2.1.52; Glycan Metabolism - glycosaminoglycan degradation; Glycan Metabolism - glycosphingolipid biosynthesis - ganglio series; Glycan Metabolism - glycosphingolipid biosynthesis - globo series; Glycan Metabolism - other glycan degradation; Hydrolase Chromosomal Location of Human Ortholog: 5q13.3 Cellular Component: acrosomal vesicle; azurophil granule; extracellular region; lysosomal lumen; membrane Molecular Function:acetylglucosaminyltransferase activity; beta-N-acetylhexosaminidase activity; protein heterodimerization activity; protein homodimerization activity Biological Process: astrocyte cell migration; cellular calcium ion homeostasis; cellular protein metabolic process; chondroitin sulfate catabolic process; ganglioside catabolic process; glycosphingolipid metabolic process; hyaluronan catabolic process; keratan sulfate catabolic process; lipid storage; locomotory behavior; lysosome organization and biogenesis; male courtship behavior; myelination; neuromuscular process controlling balance; neutrophil degranulation; oligosaccharide catabolic process; oogenesis; penetration of zona pellucida; phospholipid biosynthetic process; positive regulation of transcription from RNA polymerase II promoter; regulation of cell shape; sensory perception of sound; skeletal system development Disease: Sandhoff Disease |
| NCBI Summary: | Hexosaminidase B is the beta subunit of the lysosomal enzyme beta-hexosaminidase that, together with the cofactor GM2 activator protein, catalyzes the degradation of the ganglioside GM2, and other molecules containing terminal N-acetyl hexosamines. Beta-hexosaminidase is composed of two subunits, alpha and beta, which are encoded by separate genes. Both beta-hexosaminidase alpha and beta subunits are members of family 20 of glycosyl hydrolases. Mutations in the alpha or beta subunit genes lead to an accumulation of GM2 ganglioside in neurons and neurodegenerative disorders termed the GM2 gangliosidoses. Beta subunit gene mutations lead to Sandhoff disease (GM2-gangliosidosis type II). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2014] |
| UniProt Code: | P07686 |
| NCBI GenInfo Identifier: | 4504373 |
| NCBI Gene ID: | 3074 |
| NCBI Accession: | NP_000512.1 |
| UniProt Related Accession: | P07686 |
| Molecular Weight: | |
| NCBI Full Name: | beta-hexosaminidase subunit beta isoform 1 preproprotein |
| NCBI Synonym Full Names: | hexosaminidase subunit beta |
| NCBI Official Symbol: | HEXB |
| NCBI Official Synonym Symbols: | ENC-1AS; HEL-248; HEL-S-111 |
| NCBI Protein Information: | beta-hexosaminidase subunit beta |
| UniProt Protein Name: | Beta-hexosaminidase subunit beta |
| UniProt Synonym Protein Names: | Beta-N-acetylhexosaminidase subunit beta; Hexosaminidase subunit B |
| Protein Family: | Beta-hexosaminidase |
| UniProt Gene Name: | HEXB |
| 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-HEXB 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.)
