AAT — Brassica oleracea var. botrytis

Summary

BoAAT, encoded by gene BOLND125_C04P055500.1_BOLND125_V1 on cauliflower chromosome 4, is a pyridoxal phosphate-dependent aminotransferase belonging to the AspAT/PAT-like family. The enzyme exhibits multiple transaminase activities, including L-glutamate:prephenate, L-aspartate:prephenate, nicotianamine aminotransferase, and 1-aminocyclopropane-1-carboxylate synthase activities. BoAAT is associated with L-phenylalanine anabolism, tyrosine breakdown, ethylene anabolism, and amino acid metabolic processes. It is linked to embryogenesis, somatic embryogenesis, fruit ripening, cell division, and regeneration, as well as systemic acquired resistance via salicylic acid-mediated signaling. The protein localizes to the amyloplast membrane and chloroplast stroma. BoAAT is linked to protein content and callus induction traits. Studies of related genes in other species connect the family to nitrogen metabolism and root morphology.