Transforms N(2)-succinylglutamate into succinate and glutamate. H2O + N-succinyl-L-glutamate = L-glutamate + succinate Binds 1 zinc ion per subunit. Amino-acid degradation; L-arginine degradation via AST pathway; L-glutamate and succinate from L-arginine: step 5/5. By nitrogen starvation, and arginine. Induced at stationary phase by sigma S. Belongs to the AspA/AstE family. Succinylglutamate desuccinylase subfamily.