Plays a role in maintenance of the normal epithelial architecture through the repression of SNAI1 transcription in a histone deacetylase-dependent manner, and thus the regulation of E-cadherin levels. Contributes to transcriptional repression by BCL6 (By similarity). Component of the nucleosome-remodeling and histone-deacetylase multiprotein complex (NuRD). Interacts with BCL6 (By similarity). Interacts with NACC2 (By similarity). Interacts with PWWP2B (By similarity).