Synthesizes nicotianamine, a polyamine that is the first intermediate in the synthesis of the phytosiderophores of the mugineic acid type found in gramineae which serves as a sensor for the physiological iron status within the plant, and/or might be involved in the transport of iron. S-adenosyl-L-methionine:S-adenosyl-L-methionine:S-adenosyl-methionine 3-amino-3-carboxypropyltransferase 9 NAS9 NASHOR2 Nicotianamine synthase 9 340 MGMEGCCSNKKVMEEEALVKKITGLAAAIGELPSLSPSPEVNALFTELVTSCIPPSTVDVDALGPDAQEMRARLIRLCADAEGHLEAHYSDLLAAHDNPLDHLTLFPYFNNYIKLSQLEHGLLARHVPGPAPARVAFLGSGPLPLSSLVLAARHLPDASFDNYDISGEANERASRLVRADADAGARMAFRTADVADVTTELEGYDVVFLAALVGMAAEEKARLVEHLGRHMAPGAALVVRSAHGARGFLYPVVDPEEIRRGGFEVLTVHHPEDEVINSVIIARKAAAPPPVAADRDVPVNMPMPAQCAVAVSRPCLGCACELGARAHQKMKEIAMEEMEA NAS9_HORVU