The function of ENSG00000162961 (DPY30, dpy-30 histone methyltransferase complex regulatory subunit) is as follows. As part of the MLL1/MLL complex, involved in the methylation of histone H3 at 'Lys-4', particularly trimethylation. Histone H3 'Lys- 4' methylation represents a specific tag for epigenetic transcriptional activation. May play some role in histone H3 acetylation. In a teratocarcinoma cell, plays a crucial role in retinoic acid-induced differentiation along the neural lineage, regulating gene induction and H3 'Lys-4' methylation at key developmental loci. May also play an indirect or direct role in endosomal transport. {ECO:0000269|PubMed:19556245, ECO:0000269|PubMed:19651892, ECO:0000269|PubMed:21335234}.