Acts as an anti-silencing factor that prevents DNA hypermethylation and gene repression (PubMed:25684209). Interacts with MBD7 (via C-terminus), IDM1 and IDM2 (PubMed:25684209). Part of a complex made of MBD7, IDM1, IDM2 and IDM3 (PubMed:25684209). Not regulated by heat.