Has both folate hydrolase and N-acetylated-alpha-linked-acidic dipeptidase (NAALADase) activity. Has a preference for tri-alpha-glutamate peptides. In the intestine, required for the uptake of folate. In the brain, modulates excitatory neurotransmission through the hydrolysis of the neuropeptide, N-aceylaspartylglutamate (NAAG), thereby releasing glutamate. Isoform PSM-4 and isoform PSM-5 would appear to be physiologically irrelevant. Involved in prostate tumor progression.Also exhibits a dipeptidyl-peptidase IV type activity. In vitro, cleaves Gly-Pro-AMC.
[1]"Molecular cloning of a complementary DNA encoding a prostate-specific membrane antigen."IsraeliR.., Powell C.T., Fair W.R., Heston W.D.W.Cancer Res. 53:227-230(1993) [2]"Alternatively spliced variants of prostate-specific membrane antigen RNA: ratio