Nicotianamine aminotransferase () is an enzyme that catalyzes the chemical reaction
The two substrates of this enzyme are nicotianamine and 2-oxoglutaric acid. Its products are 3"-deamino-3"-oxonicotianamine and glutamic acid.
This enzyme belongs to the family of transferases, specifically the transaminases, which transfer nitrogenous groups. The systematic name of this enzyme class is nicotianamine:2-oxoglutarate aminotransferase; nicotianamine transaminase. Other names in common use include NAAT, NAAT-I, NAAT-II, and NAAT-III.
Both the starting material and product of this enzyme are phytosiderophores that help higher plants absorb metal ions from soil.