The targeting construct contains an FRT-flanked PGK-neo cassette upstream of exon 7 and a point mutation c.816C-T (p.R272C) mutation inserted into exon 7 by site-directed mutagenesis. Flp-mediated recombination removed the FRT-flanked neo cassette. The R272C mutation is assoicated with autosomal recessive spastic ataxia of Charlevoix-Saquenay (ARSACS). (J:273562)