Description
Human Catechol O-methyltransferase (COMT) ELISA Kit
The Human Catechol-O-Methyltransferase (COMT) ELISA Kit is a highly sensitive and specific assay designed for the accurate quantification of COMT levels in human samples such as serum, plasma, and cell culture supernatants. This kit provides reliable and reproducible results, making it an excellent tool for various research applications.COMT is an essential enzyme that plays a critical role in the degradation of neurotransmitters such as dopamine, norepinephrine, and epinephrine.
Dysregulation of COMT has been associated with various neurological and psychiatric disorders, making it a valuable biomarker for studying these conditions and developing potential therapeutic interventions.Overall, the Human COMT ELISA Kit offers researchers a precise and efficient method for measuring COMT levels in human samples, providing valuable insights into the role of this enzyme in health and disease.
| Product Name: | Human Catechol O-methyltransferase (COMT) ELISA Kit |
| SKU: | HUEB2637 |
| Size: | 96T |
| Target: | Human Catechol O-methyltransferase (COMT) |
| Synonyms: | Catechol O-methyltransferase, COMT, 2.1.1.6 |
| Assay Type: | Sandwich |
| Detection Method: | ELISA |
| Reactivity: | Human |
| Detection Range: | 0.156-10ng/mL |
| Sensitivity: | 0.023ng/mL |
| Intra CV: | 6.5% | ||||||||||||||||||||
| Inter CV: | 9.9% | ||||||||||||||||||||
| Linearity: |
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| Recovery: |
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| Function: | Catalyzes the O-methylation, and thereby the inactivation, of catecholamine neurotransmitters and catechol hormones. Also shortens the biological half-lives of certain neuroactive drugs, like L-DOPA, alpha-methyl DOPA and isoproterenol. |
| Uniprot: | P21964 |
| Sample Type: | Serum, plasma, tissue homogenates, cell culture supernates and other biological fluids |
| Specificity: | Natural and recombinant human Catechol O-methyltransferase |
| Research Area: | Neurosciences |
| Subcellular Location: | Isoform Membrane-bound Cell membrane Single-pass type II membrane protein Extracellular side |
| Storage: | Please see kit components below for exact storage details |
| Note: | For research use only |
| UniProt Protein Function: | COMT: Catalyzes the O-methylation, and thereby the inactivation, of catecholamine neurotransmitters and catechol hormones. Also shortens the biological half-lives of certain neuroactive drugs, like L-DOPA, alpha-methyl DOPA and isoproterenol. Belongs to the mammalian catechol-O-methyltransferase family. 2 isoforms of the human protein are produced by alternative initiation. |
| UniProt Protein Details: | Protein type:Membrane protein, integral; Methyltransferase; EC 2.1.1.6; Amino Acid Metabolism - tyrosine Chromosomal Location of Human Ortholog: 22q11.21 Cellular Component: postsynaptic membrane; mitochondrion; membrane; axon; plasma membrane; dendritic spine; integral to membrane; cytosol Molecular Function:protein binding; magnesium ion binding; O-methyltransferase activity; catechol O-methyltransferase activity Biological Process: response to drug; methylation; estrogen metabolic process; cellular response to phosphate starvation; neurotransmitter catabolic process; dopamine catabolic process; negative regulation of smooth muscle cell proliferation; short-term memory; response to pain; response to lipopolysaccharide; female pregnancy; learning; reproductive process in a multicellular organism; response to organic cyclic substance; positive regulation of homocysteine metabolic process; negative regulation of dopamine metabolic process; synaptic transmission; xenobiotic metabolic process; regulation of sensory perception of pain; developmental process; neurotransmitter biosynthetic process Disease: Schizophrenia; Panic Disorder 1 |
| NCBI Summary: | Catechol-O-methyltransferase catalyzes the transfer of a methyl group from S-adenosylmethionine to catecholamines, including the neurotransmitters dopamine, epinephrine, and norepinephrine. This O-methylation results in one of the major degradative pathways of the catecholamine transmitters. In addition to its role in the metabolism of endogenous substances, COMT is important in the metabolism of catechol drugs used in the treatment of hypertension, asthma, and Parkinson disease. COMT is found in two forms in tissues, a soluble form (S-COMT) and a membrane-bound form (MB-COMT). The differences between S-COMT and MB-COMT reside within the N-termini. Several transcript variants are formed through the use of alternative translation initiation sites and promoters. [provided by RefSeq, Sep 2008] |
| UniProt Code: | P21964 |
| NCBI GenInfo Identifier: | 116907 |
| NCBI Gene ID: | 1312 |
| NCBI Accession: | P21964.2 |
| UniProt Secondary Accession: | P21964,Q6IB07, Q6ICE6, Q9BWC7, A8MPV9, |
| UniProt Related Accession: | P21964 |
| Molecular Weight: | 271 |
| NCBI Full Name: | Catechol O-methyltransferase |
| NCBI Synonym Full Names: | catechol-O-methyltransferase |
| NCBI Official Symbol: | COMT |
| NCBI Official Synonym Symbols: | HEL-S-98n |
| NCBI Protein Information: | catechol O-methyltransferase; epididymis secretory sperm binding protein Li 98n |
| UniProt Protein Name: | Catechol O-methyltransferase |
| Protein Family: | Catechol O-methyltransferase |
| UniProt Gene Name: | COMT |
| UniProt Entry Name: | COMT_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. |
