Prokaryotic-type aspartate aminotransferase. Has also a prenate transaminase activity (PubMed:21102469). Involved in the aromatic amino acids biosynthesis pathway via the arogenate route (PubMed:21102469). Required for the transamination of prephenate into arogenate (PubMed:21102469). Can use 2-oxoglutarate, oxaloacetate and prephenate as substrates, but not phenylpyruvate or 4-hydroxyphenylpyruvate (PubMed:21102469). 2-oxoglutarate + L-aspartate = L-glutamate + oxaloacetate L-arogenate + oxaloacetate = L-aspartate + prephenate 2-oxoglutarate + L-arogenate = L-glutamate + prephenate Amino-acid biosynthesis; L-phenylalanine biosynthesis; L-arogenate from prephenate (L-Asp route): step 1/1. Amino-acid biosynthesis; L-phenylalanine biosynthesis; L-arogenate from prephenate (L-Glu route): step 1/1. Homodimer. Expressed in flowers, pistils, stamens, ovaries and at lower levels in leaves and sepals. Triggered by EOBI in flowers. Belongs to the class-I pyridoxal-phosphate-dependent aminotransferase family.