Catalyzes the reversible conversion of aspartate and 2-oxoglutarate to glutamate and oxaloacetate (PubMed:24302739). Does not have prephenate aminotransferase activity (PubMed:24302739). 2-oxoglutarate + L-aspartate = L-glutamate + oxaloacetate Homodimer. Belongs to the class-I pyridoxal-phosphate-dependent aminotransferase family.