4351 3-Methoxytyrosine 3-Methoxytyrosine is one of the main biochemical markers for Aromatic L-amino acid decarboxylase (AADC, EC 4.1.1.28) deficiency, an inborn error of metabolism that affects serotonin and dopamine biosynthesis. Patients are usually detected in infancy due to developmental delay, hypotonia, and extrapyramidal movements. Diagnosis is based on an abnormal neurotransmitter metabolite profile in CSF and reduced AADC activity in plasma. 3-methoxytyrosine is elevated in CSF, plasma, and urine. (A3381, A3382, A3383). 7636-26-2 1670 C10H13NO4 White powder. Methoxytyrosine is one of the main biochemical markers for aromatic L-amino acid decarboxylase deficiency, an inborn error of metabolism that affects serotonin and dopamine biosynthesis. 3-Methoxytyrosine is elevated in CSF, plasma, and urine. Catechol-O-methyl transferase is the enzyme in charge of 3-methoxytyrosine formation, which is produced from L-DOPA in many organs. Nevertheless, its half-life (15 hours approximately) is longer than the L-DOPA 's half-life, which is about one hour. This means that it is accumulated in the plasma and the brain of chronic L-DOPA therapy patients such as people suffering from Parkinson's disease. 3-Methoxytyrosine has some effects on L-DOPA related motor dysfunction, inhibition of striatal uptake of tyrosine, competition with L-DOPA for the blood–brain barrier transporter system and inhibition of dopamine release. 3-Methoxytyrosine increases homocysteine levels, and this amino acid induces cardiovascular disease and neuronal damage. Some other toxic effects could be oxidative DNA damage which can cause cell death, a decrease in locomotor activities and diminishment in mitochondrial membrane potential. (Wikipedia) No indication of carcinogenicity to humans (not listed by IARC). This is an endogenously produced metabolite found in the human body. It is used in metabolic reactions, catabolic reactions or waste generation. Chronically high levels of 3-methoxytyrosine are associated with Aromatic L-Amino acid Decarboxylase Deficiency. 2014-08-29T06:16:49Z 2016-11-09T01:09:06Z true COC1=CC(CC(N)C(O)=O)=CC=C1O C10H13NO4 InChI=1S/C10H13NO4/c1-15-9-5-6(2-3-8(9)12)4-7(11)10(13)14/h2-3,5,7,12H,4,11H2,1H3,(H,13,14) PFDUUKDQEHURQC-UHFFFAOYSA-N 211.2145 211.084457909 Endogenous Solid HMDB01434 1607 Zampella Angela; D'Orsi Rosa; Sepe Valentina; Casapullo Agostino; Monti Maria Chiara; D'Auria Maria Valeria Concise synthesis of all stereoisomers of beta-methoxytyrosine and determination of the absolute configuration of the residue in callipeltin A. Organic letters (2005), 7(16), 3585-8. CHEM003257 2-amino-3-(4-hydroxy-3-methoxyphenyl)propanoic acid