The function of ENSG00000143499 (SMYD2, SET and MYND domain containing 2) is as follows. Protein-lysine N-methyltransferase that methylates both histones and non-histone proteins, including p53/TP53 and RB1. Specifically trimethylates histone H3 'Lys-4' (H3K4me3) in vivo. The activity requires interaction with HSP90alpha. Shows even higher methyltransferase activity on p53/TP53. Monomethylates 'Lys-370' of p53/TP53, leading to decreased DNA-binding activity and subsequent transcriptional regulation activity of p53/TP53. Monomethylates RB1 at 'Lys-860'. {ECO:0000269|PubMed:17108971, ECO:0000269|PubMed:17805299, ECO:0000269|PubMed:18065756, ECO:0000269|PubMed:20870719, ECO:0000269|PubMed:21782458, ECO:0000269|PubMed:21880715}.