Histone-lysine N-methyltransferase SMYD3 (SMYD3)

Histone methyltransferase. Specifically methylates'Lys- 4' of histone H3, inducing di- and tri-methylation, but not monomethylation (PubMed:15235609, PubMed:22419068).

Additionally methylates'Lys-5' of histone H4 (PubMed:22419068). Plays an important role in transcriptional activation as a member of an RNA polymerase complex (PubMed:15235609).