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Key Specifications Table
| Species Reactivity | Key Applications | Host | Format | Antibody Type |
|---|---|---|---|---|
| H | WB, IHC | Rb | Affinity Purified | Polyclonal Antibody |
| Description | |
|---|---|
| Catalogue Number | AB5873-I |
| Replaces | AB5873 |
| Description | Anti-Catechol O-methyltransferase/COMT Antibody |
| Alternate Names |
|
| Background Information | Catechol O-methyltransferase (EC 2.1.1.6; UniProt P21964) is encoded by the COMT gene (Gene ID 1312) in human. Catechol-O-methyltransferase initiates the metabolic breakdown of catecholamines (including the neurotransmitters dopamine, epinephrine, and norepinephrine) by catalyzing the transfer of a methyl group from S-adenosylmethionine (SAM) to catecholamines in the presence Mg++. This O-methylation results in one of the major degradative pathways of the catecholamine transmitters. In addition to endogenous substances, COMT is also important in the metabolism of catechol drugs. Two isoforms exist as a result of alternative initiation codon usage. The membrane-bound isoform or MB-COMT contains a short N-terminal cytoplasmic tail (a.a. 1-6), a transmembrane segment (a.a. 7-26), and a large C-terminal extracellular region (a.a. 27-271), while the soluble or S-COMT isoform lacks the N-terminal 50-amino acid sequence of MB-COMT. MB-COMT and S-COMT differ in their substrate affinity and capacities. Despite having a lower capacity than S-COMT, MB-COMT has around a 10-fold greater affinity for dopamine and noradrenaline, and therefore is likely to be better suited for metabolizing catecholamines at the concentrations found in brain. The influence of the Val(158)Met polymorphic form of catechol-o-methyltransferase (COMT) on brain activation and functional connectivity is the subject of numerous studies. |
| Product Information | |
|---|---|
| Format | Affinity Purified |
| Presentation | Purified rabbit polyclonal antibody in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide. |
| Quality Level | MQ100 |
| Applications | |
|---|---|
| Application | This Anti-Catechol O-methyltransferase Antibody is validated for use in Western Blotting, Immunohistochemistry for the detection of COMT. |
| Key Applications |
|
| Application Notes | Immunohistochemistry Analysis: A 1:2,000 dilution from a representative lot detected Catechol O-methyltransferase/COMT in human prostate cancer, normal liver and kidney tissue sections. |
| Biological Information | |
|---|---|
| Immunogen | KLH-conjugated linear peptide corresponding to an extracellular domain sequence of human catechol O-methyltransferase. |
| Epitope | Extracellular domain. |
| Concentration | Please refer to lot specific datasheet. |
| Host | Rabbit |
| Specificity | This polyclonal antibody was raised against a sequence present in both the membrane-bound (MB-COMT) and the soluble (S-COMT) spliced isoforms of human catechol O-methyltransferase reported by UniProt (P21964). |
| Species Reactivity |
|
| Species Reactivity Note | Human. Predicted to react with Horse, Porcine, Rhesus Macaque, Bovine based on 100% sequence homology. |
| Antibody Type | Polyclonal Antibody |
| Entrez Gene Number |
|
| Gene Symbol |
|
| Purification Method | Affinity purified. |
| UniProt Number |
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| Molecular Weight | ~28 kDa observed. 30.04 kDa (human MB-COMT) and 24.45 kDa (human S-COMT) calculated. Uncharacterized band(s) may appear in some lysates. |
| Product Usage Statements | |
|---|---|
| Quality Assurance | Evaluated by Western Blotting in human fetal liver tissue lysate. Western Blotting Analysis: 0.2 µg/mL of this antibody detected Catechol O-methyltransferase/COMT in 10 µg of human fetal liver tissue lysate. |
| Usage Statement |
|
| Storage and Shipping Information | |
|---|---|
| Storage Conditions | Stable for 1 year at 2-8°C from date of receipt. |
| Packaging Information | |
|---|---|
| Material Size | 100 μg |