Members of this family are putrescine aminotransferase, as found in Escherichia coli, Erwinia carotovora subsp. atroseptica, and closely related species. This pyridoxal phosphate enzyme, as characterized in E. coli, can act also on cadaverine and, more weakly, spermidine. [Central intermediary metabolism, Polyamine biosynthesis]
Jiyao W et al.(2023). "The conserved domain database in 2023.",