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 (By similarity). Can suppress the cytotoxicity of ATXN1 in spinocerebellar ataxia type 1 (SCA1).
Synonyms: Brother of ataxin-1
Gene name: Atxn1l