This is the conserved C-terminal 100 residues of Ataxin-10. Ataxin-10 belongs to the family of armadillo repeat proteins and in solution it tends to form homotrimeric complexes, which associate via a tip-to-tip association in a horseshoe-shaped contact with the concave sides of the molecules facing each other. This domain may represent the homo-association site since that is located near the C-terminus of Ataxin-10. The protein does not contain a signal sequence for secretion or any subcellular compartment confirming its cytoplasmic localisation, specifically to the olivocerebellar region [1].

1: Ataxin-10, the spinocerebellar ataxia type 10 neurodegenerative disorder protein, is essential for survival of cerebellar neurons. Marz P, Probst A, Lang S, Schwager M, Rose-John S, Otten U, Ozbek S; J Biol Chem. 2004;279:35542-35550. PMID:15201271