2. Signaling Pathways
  3. Metabolic Enzyme/Protease
    Neuronal Signaling
  4. COMT

COMT

Catechol-O-methyltransferase

COMT

Related Products

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Catechol O-methyltransferase (COMT) is the enzyme responsible for the O-methylation of endogenous neurotransmitters and of xenobiotic substances and hormones incorporating catecholic structures. COMT is present in mammals as soluble (S-COMT) and membrane-bound (MB-COMT) forms. S-COMT is the predominant form of COMT in the peripheral organs and MB-COMT is more abundant in the Central Nervous System. Physiological substrates of COMT include L-dopa, catecholamines (dopamine, norepinephrine, and epinephrine), their hydroxylated metabolites, catecholestrogens, ascorbic acid, and dihydroxyindolic intermediates of melanin. Specifically, COMT plays a critical role in the inactivation and metabolism of dopamine and other catechol compounds. The enzyme reduces a catechol molecule in order to prevent genomic damage through DNA adduct formation or via oxygen radicals produced from the redox cycling of catechols. COMT is a druggable biological target for the treatment of various central and peripheral nervous system disorders, including Parkinson's disease, depression, schizophrenia, and other dopamine deficiency-related diseases[1].

COMT Related Products (42):

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-W012264
    3-O-Methyldopa monohydrate
    		98.87%
    3-O-Methyldopa monohydrate (3-Methoxy-L-tyrosine monohydrate) is a significant metabolite of L-DOPA produced through the action of catechol O-methyltransferase (COMT). Unlike its precursor, 3-O-Methyldopa does not serve as a substrate or inhibitor of L-amino acid decarboxylase activity. Additionally, the inhibition of COMT can amplify the anti-Parkinson effects of L-DOPA.
    3-O-Methyldopa monohydrate
  • HY-157719
    S-Adenosylhomocysteine sulfoxide
    		Inhibitor
    S-Adenosylhomocysteine sulfoxide is an inhibitor of catechol-O-methyltransferase (COMT) with an IC50 value of 860 μM. S-Adenosylhomocysteine sulfoxide can be used in the research of methylation reaction modulators.
    S-Adenosylhomocysteine sulfoxide
  • HY-100642S
    3-O-Methyltolcapone-d7
    		Inhibitor ≥99.0%
    3-O-Methyltolcapone-d7 is a deuterium labeled 3-O-Methyltolcapone. 3-O-Methyltolcapone is a metabolite of Tolcapone. Tolcapone is an orally active, reversible, selective and potent COMT inhibitor. Tolcapone crosses the blood-brain barrier, and can be used for treatment of Parkinson's disease[1][2].
    3-O-Methyltolcapone-d<sub>7</sub>
  • HY-139089
    (Z)-Entacapone
    		Inhibitor
    (Z)-Entacapone is a metabolite of the catechol-O-methyltransferase (COMT) inhibitor Entacapone (HY-14280). It is also a potential impurity found in commercial preparations of Entacapone and a degradant of Entacapone formed by UV light exposure.
    (Z)-Entacapone
  • HY-133068A
    (E)-5-Hydroxyferulic acid
    (E)-5-Hydroxyferulic acid is the E-isomer of 5-hydroxyferulic acid (HY-133068). 5-hydroxyferulic acid is a hydroxycinnamic acid and is a metabolite of the phenylpropanoid pathway. 5-Hydroxyferulic acid is a precursor in the biosynthesis of sinapic acid and is also a COMT non-esterifed substrat.
    (E)-5-Hydroxyferulic acid
  • HY-120325
    DHMPA
    		Inhibitor
    DHMPA is an effective depletor of norepinephrine content of the heart, brain and spleen in mouse and rat. DHMPA has antihypertensive effects.
    DHMPA
  • HY-100642
    3-O-Methyltolcapone
    		Inhibitor 99.95%
    3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone. Tolcapone is an orally active, reversible, selective and potent COMT inhibitor. Tolcapone crosses the blood-brain barrier, and can be used for treatment of Parkinson's disease.
    3-O-Methyltolcapone
  • HY-14280R
    Entacapone (Standard)
    		Inhibitor
    Entacapone (Standard) is the analytical standard of Entacapone. This product is intended for research and analytical applications. Entacapone is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone inhibits COMT from rat brain, erythrocytes and liver with IC50 values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC50s>50 µM). Entacapone can be used for the research of Parkinson's disease. Entacapone serves as a inhibitor of FTO demethylation with an IC50 of 3.5 μM, can be used for the research of metabolic disorders.
    Entacapone (Standard)
  • HY-17406S
    Tolcapone-d7
    		Inhibitor
    Tolcapone-d7 is a deuterium labeled Tolcapone. Tolcapone is a selective, potent and orally active COMT inhibitor. Tolcapone is also a potent inhibitor of α-syn and Aβ42 oligomerization and fibrillogenesis and protect against extracellular toxicity induced by the aggregation of both proteins in PC12 cells[1][2].
    Tolcapone-d<sub>7</sub>
  • HY-17406R
    Tolcapone (Standard)
    		Inhibitor
    Tolcapone (Standard) is the analytical standard of Tolcapone. This product is intended for research and analytical applications. Tolcapone (Ro 40-7592) is a selective, orally active and powerful mixed (peripheral and central) COMT inhibitor with an IC50 of 773 nM in the liver. Tolcapone is also a potent inhibitor of α-syn and Aβ42 oligomerization and fibrillogenesis. Tolcapone induces oxidative stress leading to apoptosis and inhibition of tumor growth in neuroblastoma.
    Tolcapone (Standard)
  • HY-151390
    hMAO-B/MB-COMT-IN-2
    		Inhibitor
    hMAO-B/MB-COMT-IN-2 is a dual MAO-B/MB-COMT inhibitor (IC50s: 4.27 μΜ for hMAO-B, 2.69 μΜ for MB-COMT). hMAO-B/MB-COMT-IN-2 protects cells against oxidative damage. hMAO-B/MB-COMT-IN-2 can be used in the research of neurodegeneration disease, such as Parkinson’s Disease (PD).
    hMAO-B/MB-COMT-IN-2
  • HY-100642S1
    3-O-Methyltolcapone-d4
    		Inhibitor
    3-O-Methyltolcapone-d4 is the deuterium labeled 3-O-Methyltolcapone. 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone. Tolcapone is an orally active, reversible, selective and potent COMT inhibitor. Tolcapone crosses the blood-brain barrier, and can be used for treatment of Parkinson's disease[1][2].
    3-O-Methyltolcapone-d<sub>4</sub>
  • HY-162760
    COMT-IN-1
    		Inhibitor
    COMT-IN-1 (compound C12), a nitrophenolic analogue, is an orally active dopamine metabolic enzyme catechol-O-methyltransferase (COMT) inhibitor with IC50s of 0.37 μM, 95.58 μM and 58.82 μM for COMT, MAO-A and MAO-B, respectively. COMT-IN-1 exhibits chelation with a variety of metal ions. COMT-IN-1 exhibits good BBB permeability. COMT-IN-1 improves dopamine levels and ameliorates MPTP (HY-15608)-induced Parkinson's disease (PD) symptoms in mice.
    COMT-IN-1
  • HY-N0529R
    Rosmarinic acid (Standard)
    		Inhibitor
    Rosmarinic acid (Standard) is the analytical standard of Rosmarinic acid. This product is intended for research and analytical applications. Rosmarinic acid is a widespread phenolic ester compound in the plants. Rosmarinic acid inhibits MAO-A, MAO-B and COMT enzymes with IC50s of 50.1, 184.6 and 26.7 μM, respectively.
    Rosmarinic acid (Standard)
  • HY-169611
    Serotonin maleate
    		Inhibitor
    Serotonin hydrogen maleate is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin hydrogen maleate is also a catechol O-methyltransferase (COMT) inhibitor with a Ki of 44 μM .
    Serotonin maleate
  • HY-168154
    COMT-IN-2
    		Inhibitor
    COMT-IN-2 (compund 9) is the potent COMT inhibitor, showing selective inhibition of brain (IC50=24 nM) and liver (IC50=81 nM) MB-COMT compared to the liver S-COMT (IC50=620 nM) isoform.
    COMT-IN-2
  • HY-19061
    CGP 28014
    		Inhibitor
    CGP 28014 is a catechol-O-methyltransferase inhibitor. CGP 28014 can lower HVA levels and increase DOPAC levels in the striatum of rats, making it useful for research on Parkinson's disease.
    CGP 28014
  • HY-14896R
    Opicapone (Standard)
    		Inhibitor
    Opicapone (Standard) is the analytical standard of Opicapone. This product is intended for research and analytical applications. Opicapone (BIA 9-1067) is a potent third-generation catechol-O-methyltransferase (COMT) inhibitor for the research of Parkinson's disease and motor fluctuations. Opicapone decreases the ATP content of the cells with an IC50 of 98 μM.
    Opicapone (Standard)
  • HY-14280A
    Entacapone sodium salt
    		Inhibitor
    Entacapone sodium salt is a potent, reversible, peripherally acting and orally active catechol-O-methyltransferase (COMT) inhibitor. Entacapone sodium salt inhibits COMT from rat brain, erythrocytes and liver with IC50 values of 10 nM, 20 nM, and 160 nM, respectively. Entacapone sodium salt is selective for COMT over other catecholamine metabolizing enzymes, including MAO-A, MAO-B, phenolsulphotransferase M (PST-M) and PST-P (IC50s>50 μM). Entacapone sodium salt can be used for the research of Parkinson's disease. Entacapone sodium salt serves as as a inhibit of FTO demethylation with an IC50 of 3.5 μM, can be used for the research of metabolic disorders.
    Entacapone sodium salt
  • HY-100642R
    3-O-Methyltolcapone (Standard)
    		Inhibitor
    3-O-Methyltolcapone (Standard) is the analytical standard of 3-O-Methyltolcapone. This product is intended for research and analytical applications. 3-O-Methyltolcapone (Ro 40-7591) is a metabolite of Tolcapone. Tolcapone is an orally active, reversible, selective and potent COMT inhibitor. Tolcapone crosses the blood-brain barrier, and can be used for treatment of Parkinson's disease.
    3-O-Methyltolcapone (Standard)