A chromatin-binding factor that represses Notch signaling and associates with RNA. Expansion of the polyglutamine tract by expanded CAG repeats in the ATXN1 gene coding region is associated with SPINOCEREBELLAR ATAXIA 1.

Synonyms: Protein, Atxn1, Protein, Atxn-1, Ataxin-1, Ataxin 1 Protein, Spinocerebellar Ataxia Type 1 Protein, SCA1 Protein, Atxn 1 Protein, 0, Ataxin 1, Protein, SCA1, Protein, Ataxin-1, Ataxin-1 Protein, Atxn1 Protein, Atxn-1 Protein