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S)-3,5-Dihydroxyphenylglycine or DHPG is a potent agonist of group I metabotropic glutamate receptors (mGluRs) mGluR1 and mGluR5. DHPG was the first agonist shown to be selective for group I mGluRs. [1] Agonist activity is found in only the (S)-isomer, and (S)-DHPG may be a partial agonist of group I mGluRs. [1]
This enzyme is involved in the biosynthesis of the nonproteinogenic amino acid -3,5-dihydroxyphenylglycine (Dpg) responsible of the production of vancomycin and teicoplanin antibiotics. It catalyzes the unusual conversion 3,5-dihydroxyphenylacetyl-CoA (DPA-CoA) to 3,5-dihydroxyphenylglyoxylate.
3,4-Dihydroxyphenylacetic acid (DOPAC) is a metabolite of the neurotransmitter dopamine.Dopamine can be metabolized into one of three substances. One such substance is DOPAC.
Biosynthesis of HPG. HPG is synthesized from prephenate, an intermediate in the shikimic acid pathway and also a precursor to tyrosine.Prephenate is aromatized by prephenate dehydrogenase (Pdh) using NAD + as a cofactor to produce 4-hydroxyphenylpyruvate. 4-Hydroxyphenylpyruvate is then oxidized by 4-hydroxymandelate synthase (4HmaS) using oxygen to form 4-hydroxymandelate and hydrogen ...
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DOPAL is known to be a dopaminergic neurotoxin. [2] [4] [3] It is much more potent in this regard than dopamine itself and other metabolites of dopamine.[2] [4] [3] According to the catecholaldehyde hypothesis, DOPAL plays a role in aging-related dopaminergic neurodegeneration and in the pathogenesis of Parkinson's disease.