Contributes to histone modification. May position the N-terminus of histone H3 for efficient trimethylation at 'Lys-4'. As part of the MLL1/MLL complex it is involved in methylation and dimethylation at 'Lys-4' of histone H3. H3 'Lys-4' methylation represents a specific tag for epigenetic transcriptional activation. As part of the NSL complex it may be involved in acetylation of nucleosomal histone H4 on several lysine residues.
Molecular Function
Chromatin regulator
Subcellular Location
Nucleus
Structure
Interacts with PAXBP1; the interaction is direct and links a WDR5-containing histone methyltransferase complex to PAX7 and PAX3. Interacts with HCFC1. Component of the ATAC complex, a complex with histone acetyltransferase activity on histones H3 and H4.