In enzymology, a nicotianamine synthase () is an enzyme that catalyzes the chemical reaction 3 S-adenosyl-L-methionine 3 S-methyl-5'-thioadenosine + nicotianamine Hence, this enzyme has one substrate, S-adenosyl-L-methionine, and two products, S-methyl-5'-thioadenosine and nicotianamine. This enzyme belongs to the family of transferases, specifically those transferring aryl or alkyl groups other than methyl groups. The systematic name of this enzyme class is S-adenosyl-L-methionine:S-adenosyl-L-methionine:S-adenosyl-Lmethioni ne 3-amino-3-carboxypropyltransferase. References EC 2.5.1 Enzymes of unknown structure