UAS regulatory sequences drive expression of Hsap\ATXN3 with the normal polyQ tract of 22 repeats. The protein carries a mutation in the Hsap\VCP protein-binding site (amino acid replacement RKRR to HNHH) and is tagged at the C-terminal end with Tag:polyHis.
Expression of Hsap\ATXN3HNHH.Scer\UAS.T:Zzzz\His6 driven by Scer\GAL4GMR.long does not significantly affect eye structure or morphology.
Co-expression of Hsap\ATXN3HNHH.Scer\UAS.T:Zzzz\His6 significantly suppresses the eye degeneration seen in flies with expression of Hsap\ATXN3tr.Q78.Scer\UAS.T:Ivir\HA1 driven by Scer\GAL4GMR.long.