title: Measurement of glutamate carboxypeptidase II (NAALADase) enzyme activity by the hydrolysis of [³H]-N-acetylaspartylglutamate (NAAG).
abstract: The peptide N-Acetylaspartylglutamate (NAAG) is hydrolyzed by N-Acetylated-alpha-linked-acidic dipeptidase (NAALADase, glutamate carboxypeptidase II) into N-Acetylated aspartate (NAA) and glutamate. Hydrolysis can be measured as described in this unit by employing radiolabeled NAAG (NAA-[(3)H]glu) as the substrate. The occurrence of NAALADase activity in a wide range of tissues has implications for a variety of physiological purposes. The assay described here is useful for the analysis of NAALADase activity and its inhibition in brain synaptosomal preparations, tissue homogenates and tissue culture cell pellets.
authors.affiliation: Guilford Pharmaceuticals, Baltimore, Maryland, USA.
authors.forename: Carol W
authors.initials: CW
authors.lastname: Tiffany
authors.forename: Barbara S
authors.initials: BS
authors.lastname: Slusher
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000378:metabolism*; D004151:Dipeptides / Q000378:metabolism*; D043425:Glutamate Carboxypeptidase II / Q000037:antagonists & inhibitors / Q000378:metabolism*; D006801:Humans; D006868:Hydrolysis; D051381:Rats
chemical_list: D000954:Antigens, Surface; D004151:Dipeptides; C027172:isospaglumic acid; C473848:FOLH1 protein, human; D043425:Glutamate Carboxypeptidase II