Involved in the histone deacetylase (HDAC1)-dependent transcriptional repression activity. When overexpressed in lung cancer cell line that lacks p53/TP53 expression, inhibits cell growth. Component of the Sin3/HDAC1 corepressor complex at least composed of BRMS1, BRMS1L and ING2/ING1L. Interacts with HDAC and SIN3A. Belongs to the BRMS1 family.