Date published: 2025-11-20

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MAO-A Inhibitors

MAO-A inhibitors are a class of chemical compounds that specifically inhibit the activity of the enzyme monoamine oxidase A (MAO-A). Monoamine oxidase A is one of the two isoforms of the enzyme monoamine oxidase, the other being MAO-B. These enzymes are located within the outer mitochondrial membrane and are responsible for the oxidative deamination of monoamine neurotransmitters such as serotonin, norepinephrine, and dopamine, as well as dietary amines. By inhibiting MAO-A, these compounds prevent the breakdown of these monoamines, affecting their concentration within the neural synapse. MAO-A inhibitors are characterized by their ability to bind to the active site of the enzyme, where they interfere with the enzymes ability to access its natural substrates. This inhibition can be reversible or irreversible, depending on the chemical nature of the inhibitor and its interaction with the enzyme. Reversible inhibitors generally form non-covalent bonds with MAO-A, allowing them to dissociate from the enzyme over time, whereas irreversible inhibitors typically form covalent bonds that permanently inactivate the enzyme molecule.The structure-activity relationship of MAO-A inhibitors is a critical aspect of their chemical design. These inhibitors often contain a basic nitrogen atom that mimics the natural substrates of the enzyme, allowing them to associate with the active site of MAO-A. In addition, they may possess various functional groups that enable them to interact with the enzyme's active site through hydrogen bonding, van der Waals forces, and hydrophobic interactions. The specificity of these inhibitors for MAO-A over MAO-B is influenced by the size and shape of their molecular structure, which must complement the substrate cavity of MAO-A. The design of selective MAO-A inhibitors requires a detailed understanding of the topography of the enzyme's active site and the dynamic process of enzyme-substrate interaction.

Items 11 to 20 of 24 total

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Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Moclobemide

71320-77-9sc-207891
10 mg
$91.00
(1)

Moclobemide, as a reversible inhibitor of monoamine oxidase A (MAO-A), showcases unique interactions through its ability to engage in hydrophobic contacts with the enzyme's active site. Its distinct amine group facilitates electrostatic interactions, enhancing binding affinity. The compound's conformational flexibility allows it to adapt to the enzyme's dynamic structure, potentially influencing the rate of substrate turnover and modulating the metabolic pathways of neurotransmitters.

Phenethyl-hydrazine

51-71-8sc-331686
500 mg
$388.00
(0)

Phenelzine is a non-selective, irreversible MAO inhibitor. It irreversibly binds to MAO-A, inhibiting the degradation of monoamine neurotransmitters like serotonin, norepinephrine, and dopamine.

Tetrindole mesylate

135991-95-6sc-204340
sc-204340A
10 mg
50 mg
$119.00
$446.00
(0)

Tetrindole mesylate acts as a selective inhibitor of monoamine oxidase A (MAO-A), characterized by its unique ability to form hydrogen bonds with specific amino acid residues within the enzyme's active site. This interaction stabilizes the enzyme-inhibitor complex, effectively altering the enzyme's conformation. The compound's lipophilic nature enhances membrane permeability, influencing its distribution and interaction kinetics within biological systems, thereby impacting neurotransmitter metabolism.

1-Hydrazinophthalazine Hydrochloride

304-20-1sc-206167
10 g
$280.00
(0)

1-Hydrazinophthalazine Hydrochloride exhibits a distinctive mechanism as a monoamine oxidase A (MAO-A) inhibitor, primarily through its capacity to engage in π-π stacking interactions with aromatic residues in the enzyme's active site. This interaction not only modulates the enzyme's activity but also influences the electron density within the active site, potentially affecting substrate binding dynamics. Its hydrophilic characteristics facilitate solubility in aqueous environments, impacting its diffusion and interaction profiles in biological systems.

Tranylcypromine

13492-01-8sc-200572
sc-200572A
1 g
5 g
$172.00
$587.00
5
(1)

Tranylcypromine is a non-selective, irreversible MAO inhibitor that forms a covalent bond with MAO-A, preventing the breakdown of serotonin, norepinephrine, and dopamine in the synaptic cleft.

4-Oxo-4H-1-benzopyran-2-carboxylic acid

4940-39-0sc-238937
5 g
$39.00
(0)

4-Oxo-4H-1-benzopyran-2-carboxylic acid acts as a monoamine oxidase A (MAO-A) inhibitor by forming hydrogen bonds with key amino acid residues in the enzyme's active site. This interaction alters the enzyme's conformation, enhancing substrate affinity and modulating reaction kinetics. Its unique structural features, including a fused benzopyran ring, contribute to its stability and reactivity, influencing its overall behavior in biochemical pathways.

Furazolidone

67-45-8sc-218546
sc-218546A
10 g
100 g
$89.00
$260.00
(0)

Furazolidone is a non-selective, irreversible MAO inhibitor. It covalently binds to MAO-A, inhibiting the metabolism of monoamine neurotransmitters.

Nialamide

51-12-7sc-253186
1 g
$98.00
(0)

Nialamide functions as a monoamine oxidase A (MAO-A) inhibitor through its ability to form covalent interactions with the enzyme's active site, leading to a significant alteration in the enzyme's catalytic efficiency. The presence of a hydrazine moiety enhances its reactivity, allowing for selective binding to the enzyme. This specificity is further influenced by steric factors and electronic distribution within its structure, which modulates the enzyme's activity and impacts metabolic pathways.

trans 2-(Phenyl-d5)-cyclopropylamine Hydrochloride

107077-98-5sc-220292
1 mg
$290.00
(0)

Trans 2-(Phenyl-d5)-cyclopropylamine Hydrochloride exhibits unique interactions with monoamine oxidase A (MAO-A) through its cyclopropylamine framework, which introduces strain and rigidity to the molecular structure. This configuration enhances its binding affinity, allowing for precise modulation of the enzyme's conformation. The deuterated phenyl group contributes to distinct kinetic properties, influencing reaction rates and selectivity in metabolic processes, while also affecting the stability of enzyme-substrate complexes.

Clorgyline hydrochloride

17780-75-5sc-214749
sc-214749A
50 mg
100 mg
$125.00
$210.00
2
(1)

Clorgyline hydrochloride is characterized by its selective inhibition of monoamine oxidase A (MAO-A), facilitated by its unique aromatic and aliphatic interactions. The presence of a chlorinated moiety enhances its lipophilicity, promoting effective membrane permeability. This compound's kinetic profile is influenced by its ability to form stable enzyme-inhibitor complexes, which alters the catalytic efficiency of MAO-A, leading to distinct metabolic pathways and regulatory effects on neurotransmitter levels.