Missense exchanges in the TTBK2 gene mutated in SCA11.

Abstract:

:The spinocerebellar ataxias (SCAs) with autosomal dominant inheritance are a clinically and genetically heterogeneous group of neurological disorders with overlapping as well as highly variable phenotypes primarily affecting the cerebellum. To date, 28 different loci have been identified. Nine SCAs are caused by repeat expansions; for 14 only the chromosomal localisation is known. Recently, two frameshift mutations in the tau tubulin kinase 2 gene (TTBK2) were reported to cause SCA11. To evaluate the frequency of mutations in the TTBK2 gene, we performed molecular genetic analyses in 49 unrelated familial cases with ataxia. Sequencing all coding exons revealed, amongst others, two novel missense exchanges at evolutionarily conserved amino acid positions. Although being unique in 98 alleles of ataxia patients, a disease causing effect can be excluded with high probability for both variations. This result demonstrates the challenges in diagnostic testing for SCA11.

journal_name

J Neurol

journal_title

Journal of neurology

authors

Edener U,Kurth I,Meiner A,Hoffmann F,Hübner CA,Bernard V,Gillessen-Kaesbach G,Zühlke C

doi

10.1007/s00415-009-5209-0

subject

Has Abstract

pub_date

2009-11-01 00:00:00

pages

1856-9

issue

11

eissn

0340-5354

issn

1432-1459

journal_volume

256

pub_type

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