title: Mescaline-induced changes of brain-cortex ribosomes. Mescaline demethylase activity of brain-cortex soluble supernatant.
abstract: Brain-cortex slices demethylate mescaline and p-methoxyacetanilide, a reference O-demethylating substrate, though the rate of demethylation of mescaline is about one third that of the reference substrate. The demethylase activity is localized mostly in the soluble supernatant (105 000 x g). It is purified 47-fold with respect to the demethylation of mescaline by ammonium sulfate precipitation and DEAE cellulose chromatography. The partially purified demethylase, which is stable for 3-5 days at -5 degrees C in the presence of dithiothreitol and glutathione and is inhibited by p-chloromercuribenzoate, has maximal activity at pH between 7.2 and 8.0. It demethylates mescaline into 3,4-dimethoxy-5-hydroxyphenethylamine and 3,5-dimethoxy-4-hydroxyphenethylamine and some unidentified derivatives.
mesh_terms: D000081:Acetamides / Q000031:analogs & derivatives / Q000378:metabolism; D000818:Animals; D002540:Cerebral Cortex / Q000201:enzymology / Q000648:ultrastructure*; D006041:Goats; D066298:In Vitro Techniques; D007700:Kinetics; D008635:Mescaline / Q000378:metabolism*; D010088:Oxidoreductases / Q000378:metabolism*; D010090:Oxidoreductases, O-Demethylating / Q000302:isolation & purification / Q000378:metabolism*; D013347:Subcellular Fractions / Q000201:enzymology*
chemical_list: D000081:Acetamides; D010088:Oxidoreductases; D010090:Oxidoreductases, O-Demethylating; D008635:Mescaline