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:nocardicin-E 3-amino-3-carboxypropyltransferase. This enzyme is also called nocardicin aminocarboxypropyltransferase.
References
Wilson BA, Bantia S, Salituro GM, Reeve AM, Townsend CA (1988). "Cell-free biosynthesis of nocardicin A from nocardicin E and S-adenosylmethionine". J. Am. Chem. Soc. 110 (24): 8238–8239. doi:10.1021/ja00232a047.