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Monoamine oxidase A, also known as MAO-A, is an enzyme (E.C. 1.4.3.4) that in humans is encoded by the MAOA gene. [ 5 ] [ 6 ] This gene is one of two neighboring gene family members that encode mitochondrial enzymes which catalyze the oxidative deamination of amines , such as norepinephrine , serotonin and tyramine .
Monoamine oxidase A and B share roughly 70% of their structure and both have substrate binding sites that are predominantly hydrophobic. Two tyrosine residues (398, 435 within MAO-B , 407 and 444 within MAO-A ) in the binding pocket that are commonly involved in inhibitor activity have been hypothesized to be relevant to orienting substrates ...
Monoamine oxidase inhibitors (MAOIs) are a class of drugs that inhibit the activity of one or both monoamine oxidase enzymes: monoamine oxidase A (MAO-A) and monoamine oxidase B (MAO-B). They are best known as effective antidepressants , especially for treatment-resistant depression and atypical depression . [ 1 ]
Brunner syndrome is caused by a monoamine oxidase A (MAOA) deficiency, which leads to an excess of monoamines in the brain, such as serotonin, dopamine, and norepinephrine (noradrenaline). In both mice and humans, a mutation was located on the eighth exon of the MAO-A gene, which created a dysfunctional MAO-A gene.
Flavin-containing amine oxidoreductases are a family of various amine oxidases, including maize polyamine oxidase (PAO), [2] L-amino acid oxidases (LAO) and various flavin containing monoamine oxidases (MAO). The aligned region includes the flavin binding site of these enzymes.
Amine oxidase (copper-containing) (AOC) (EC 1.4.3.21 and EC 1.4.3.22; formerly EC 1.4.3.6) is a family of amine oxidase enzymes which includes both primary-amine oxidase and diamine oxidase; these enzymes catalyze the oxidation of a wide range of biogenic amines including many neurotransmitters, histamine and xenobiotic amines.
2-NAP is a potent monoamine oxidase inhibitor (MAOI), specifically of monoamine oxidase A (MAO-A) (IC 50 Tooltip half-maximal effective concentration = 420 nM). [8] [3] 1-NAP is an MAOI as well, also of MAO-A (IC 50 = 5,630 nM), but was about 13-fold less potent than 2-NAP. [3] Neither 2-NAP or 1-NAP inhibited monoamine oxidase B (MAO-B) (IC 50 ...
Tryptolines are competitive selective inhibitors of the enzyme monoamine oxidase type A (). 5-Hydroxytryptoline and 5-methoxytryptoline (pinoline) are the most active monoamine oxidase inhibitors (MAOIs) with IC 50 s of 0.5 μM and 1.5 μM respectively.