UASt regulatory sequences drive expression of Hsap\ATXN3 with the normal polyQ tract of 22 repeats. All Lys residues in the coding sequence, except the one at position 117 have been mutated to Arg. Tagged at the C-terminal with Tag:polyHis.
Expression of Hsap\ATXN3K117.Scer\UAS.T:Zzzz\His6 in the developing eye, under the control of Scer\GAL4GMR.PF does not affect eye development.
Co-expression of Hsap\ATXN3K117.Scer\UAS.T:Zzzz\His6 suppresses the eye degeneration seen upon expression of Hsap\ATXN3tr.Q78.Scer\UAS.T:Ivir\HA1 (with both transgenes under the control of Scer\GAL4GMR.PF).