Mutations in DNMT1 cause autosomal dominant cerebellar ataxia, deafness and narcolepsy.
Winkelmann J, Lin L, Schormair B, Kornum BR, Faraco J, Plazzi G, Melberg A, Cornelio F, Urban AE, Pizza F, et al. Hum Mol Genet. 2012 May 15; 21(10):2205-10. Epub 2012 Feb 9.