Histone-lysine N-methyltransferase 2D (KMT2D)

Histone methyltransferase. Methylates 'Lys-4' of histone H3 (H3K4me).

H3K4me represents a specific tag for epigenetic transcriptional activation. Acts as a coactivator for estrogen receptor by being recruited by ESR1, thereby activating transcription.