PMID- 22328086 OWN - NLM STAT- MEDLINE DCOM- 20120913 LR - 20220408 IS - 1460-2083 (Electronic) IS - 0964-6906 (Print) IS - 0964-6906 (Linking) VI - 21 IP - 10 DP - 2012 May 15 TI - Mutations in DNMT1 cause autosomal dominant cerebellar ataxia, deafness and narcolepsy. PG - 2205-10 LID - 10.1093/hmg/dds035 [doi] AB - Autosomal dominant cerebellar ataxia, deafness and narcolepsy (ADCA-DN) is characterized by late onset (30-40 years old) cerebellar ataxia, sensory neuronal deafness, narcolepsy-cataplexy and dementia. We performed exome sequencing in five individuals from three ADCA-DN kindreds and identified DNMT1 as the only gene with mutations found in all five affected individuals. Sanger sequencing confirmed the de novo mutation p.Ala570Val in one family, and showed co-segregation of p.Val606Phe and p.Ala570Val, with the ADCA-DN phenotype, in two other kindreds. An additional ADCA-DN kindred with a p.GLY605Ala mutation was subsequently identified. Narcolepsy and deafness were the first symptoms to appear in all pedigrees, followed by ataxia. DNMT1 is a widely expressed DNA methyltransferase maintaining methylation patterns in development, and mediating transcriptional repression by direct binding to HDAC2. It is also highly expressed in immune cells and required for the differentiation of CD4+ into T regulatory cells. Mutations in exon 20 of this gene were recently reported to cause hereditary sensory neuropathy with dementia and hearing loss (HSAN1). Our mutations are all located in exon 21 and in very close spatial proximity, suggesting distinct phenotypes depending on mutation location within this gene. FAU - Winkelmann, Juliane AU - Winkelmann J AD - Institute of Human Genetics, Technische Universitat Munchen, Munich 81675, Germany. FAU - Lin, Ling AU - Lin L FAU - Schormair, Barbara AU - Schormair B FAU - Kornum, Birgitte R AU - Kornum BR FAU - Faraco, Juliette AU - Faraco J FAU - Plazzi, Giuseppe AU - Plazzi G FAU - Melberg, Atle AU - Melberg A FAU - Cornelio, Ferdinando AU - Cornelio F FAU - Urban, Alexander E AU - Urban AE FAU - Pizza, Fabio AU - Pizza F FAU - Poli, Francesca AU - Poli F FAU - Grubert, Fabian AU - Grubert F FAU - Wieland, Thomas AU - Wieland T FAU - Graf, Elisabeth AU - Graf E FAU - Hallmayer, Joachim AU - Hallmayer J FAU - Strom, Tim M AU - Strom TM FAU - Mignot, Emmanuel AU - Mignot E LA - eng GR - P50 NS023724/NS/NINDS NIH HHS/United States GR - P50 NS2372/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20120209 PL - England TA - Hum Mol Genet JT - Human molecular genetics JID - 9208958 RN - EC 2.1.1.37 (DNA (Cytosine-5-)-Methyltransferase 1) RN - EC 2.1.1.37 (DNA (Cytosine-5-)-Methyltransferases) RN - EC 2.1.1.37 (DNMT1 protein, human) SB - IM MH - Amino Acid Sequence MH - Cerebellar Ataxia/*genetics MH - DNA (Cytosine-5-)-Methyltransferase 1 MH - DNA (Cytosine-5-)-Methyltransferases/*genetics MH - Deafness/*genetics MH - Exome MH - Exons MH - *Genes, Dominant MH - Humans MH - Molecular Sequence Data MH - *Mutation MH - Narcolepsy/*genetics MH - Pedigree MH - Phenotype PMC - PMC3465691 EDAT- 2012/02/14 06:00 MHDA- 2012/09/14 06:00 PMCR- 2013/05/15 CRDT- 2012/02/14 06:00 PHST- 2012/02/14 06:00 [entrez] PHST- 2012/02/14 06:00 [pubmed] PHST- 2012/09/14 06:00 [medline] PHST- 2013/05/15 00:00 [pmc-release] AID - dds035 [pii] AID - 10.1093/hmg/dds035 [doi] PST - ppublish SO - Hum Mol Genet. 2012 May 15;21(10):2205-10. doi: 10.1093/hmg/dds035. Epub 2012 Feb 9.