This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:L-tryptophan 2-C-methyltransferase. Other names in common use include tryptophan 2-methyltransferase, and S-adenosylmethionine:tryptophan 2-methyltransferase.
References
Frenzel T, Zhou P, Floss HG (1990). "Formation of 2-methyltryptophan in the biosynthesis of thiostrepton: isolation of S-adenosylmethionine:tryptophan 2-methyltransferase". Arch. Biochem. Biophys. 278 (1): 35–40. doi:10.1016/0003-9861(90)90227-P. PMID2321967.