Binds to acetylated and methylated histones, including H3K4me3 and H4K20me3, probably acting as a histone reader that recognizes chromatin marks and mediates downstream cellular effects (PubMed:29061846, PubMed:36927955). Promotes canonical WNT signaling, and is involved in the down-regulation of cell proliferation (PubMed:36927955). {ECO:0000269|PubMed:29061846, ECO:0000269|PubMed:36927955}. This is the function of Ensembl gene identifier ENSG00000186767 (SPIN4, spindlin family member 4).