Glypican 5 (GPC5) (chromosome 13q31.3) modulates cellular signaling in the caudate nucleus, putamen and hippocampus. Variant rs1330469 is potentially related to alcohol-induced ataxia in mice, locomotion in Drosophila, and single dose oral alcohol induced ataxia in humans (Joslyn et al., 2011; Kong et al., 2010; Saunders et al., 1997).