Chromatin-binding factor that repress Notch signaling in the absence of Notch intracellular domain by acting as a CBF1 corepressor. Binds to the HEY promoter and might assist; along with NCOR2; RBPJ-mediated repression. Binds RNA in vitro. May be involved in RNA metabolism. {ECO:0000269|PubMed:21475249}.