PAT — Capsicum annuum

Summary

CaPAT (T459_10899) on pepper chromosome 3 encodes a pyridoxal phosphate-dependent aminotransferase with multiple transaminase activities, including methionine-oxo-acid, LL-diaminopimelate, and nicotianamine aminotransferase activities, as well as 1-aminocyclopropane-1-carboxylate synthase activity. The gene is associated with inhibition of IAA biosynthesis, negative regulation of ethylene biosynthesis, tyrosine breakdown, methionine metabolism, L-phenylalanine anabolism, and amino acid metabolism. It has been linked to systemic acquired resistance via salicylic acid signaling, shade avoidance, anther development, fruit ripening, and defense response. Associations with IAA content, cytoplasmic male sterility, and amino acid content have been noted. The protein localizes to the amyloplast membrane, mitochondria, and cytosol. Studies of related genes in other species link the family to chilling stress response, harvest index, and sugar content.