E3 ubiquitin-protein ligase MSL2 (MSL2)

Component of histone acetyltransferase complex responsible for nearly all histone H4 acetylation at lysine 16 which is implicated in the creation of higher-order chromatin structure. Acts as an E3 ubiquitin ligase that promotes monoubiquitination of histone H2B in'Lys-35' (H2BK34Ub), but not that of H2A.

This action is greatly enhanced by heterodimerization with MSL1. H2B ubiquitination in turn stimulates histine H3 methylation in'Lys-4' (H3K4me) and'Lys-79' (H3K79me) and results in gene activation, such as that of HOXA9 and MEIS1.