GRM1 and cerebellar ataxia: A key, known ataxia gene is Atcay (ataxia, cerebellar, Cayman type homolog (human)), and in the cerebellum-specific network, two of its top interactors are Cacna1e (with connection confidence 0.943, ranked 18) and Grm1 (0.902, ranked 46) (Figure 6).