Catalyzes the proton-dependent, binding-protein-independent transport of glutamate and aspartate. Glutamate uptake is inhibited by L-cysteate and beta-hydroxyaspartate. Inhibited by the uncoupler carbonylcyanide m-chlorophenylhydrazone (CCCP). Belongs to the dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family. GltP subfamily.