Function
Transcriptional regulator that binds CpG, CpNpN and CpNpG (N is A, T, or C) islands in promoters regardless the DNA methylation status. Plays probably a role in gene silencing. May associate with histone deacetylase proteins (HDAC). Required for nucleolar dominance that consist in the silencing of rRNA genes inherited from one progenitor in genetic hybrids. Recruited to rRNA genes in a DRM2-dependent manner. Maintains gene silencing by interacting with RNA binding proteins (e.g. NTF2, RPS2C, HDA6 and AGO4) and by regulating DNA methylation status (PubMed:28229965).