2-(N(omega)-L-arginino)succinate = fumarate + L-arginine acetyl-CoA + L-glutamate = CoA + H(+) + N-acetyl-L-glutamate Amino-acid biosynthesis; L-arginine biosynthesis; N(2)-acetyl-L-ornithine from L-glutamate: step 1/4. Amino-acid biosynthesis; L-arginine biosynthesis; L-arginine from L-ornithine and carbamoyl phosphate: step 3/3. In bacteria which possess the bifunctional enzyme ornithine acetyltransferase/N-acetylglutamate synthase (ArgJ), ArgA fulfills an anaplerotic role. In the N-terminal section; belongs to the lyase 1 family. Argininosuccinate lyase subfamily. In the C-terminal section; belongs to the acetyltransferase family. ArgA subfamily.