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- Title
Mutations in the autoregulatory domain of β-tubulin 4a cause hereditary dystonia.
- Authors
Hersheson, Joshua; Mencacci, Niccolo E.; Davis, Mary; MacDonald, Nicola; Trabzuni, Daniah; Ryten, Mina; Pittman, Alan; Paudel, Reema; Kara, Eleanna; Fawcett, Katherine; Plagnol, Vincent; Bhatia, Kailash P.; Medlar, Alan J.; Stanescu, Horia C.; Hardy, John; Kleta, Robert; Wood, Nicholas W.; Houlden, Henry
- Abstract
Dystonia type 4 (DYT4) was first described in a large family from Heacham in Norfolk with an autosomal dominantly inherited whispering dysphonia, generalized dystonia, and a characteristic hobby horse ataxic gait. We carried out a genetic linkage analysis in the extended DYT4 family that spanned 7 generations from England and Australia, revealing a single LOD score peak of 6.33 on chromosome 19p13.12-13. Exome sequencing in 2 cousins identified a single cosegregating mutation (p.R2G) in the β-tubulin 4a (TUBB4a) gene that was absent in a large number of controls. The mutation is highly conserved in the β-tubulin autoregulatory MREI (methionine-arginine-glutamic acid-isoleucine) domain, highly expressed in the central nervous system, and extensive in vitro work has previously demonstrated that substitutions at residue 2, specifically R2G, disrupt the autoregulatory capability of the wild-type β-tubulin peptide, affirming the role of the cytoskeleton in dystonia pathogenesis. Ann Neurol 2013;73:546-553
- Publication
Annals of Neurology, 2013, Vol 73, Issue 4, p546
- ISSN
0364-5134
- Publication type
Article
- DOI
10.1002/ana.23832