NDLI: A Family with Spinocerebellar Ataxia Type 5 Found to Have a Novel Missense Mutation within a SPTBN2 Spectrin Repeat

Content Provider	Springer Nature Link
Author	Cho, Ellen Fogel, Brent L.
Copyright Year	2012
Abstract	A family with late-onset autosomal dominant pure cerebellar ataxia, consistent with spinocerebellar ataxia type 5 (SCA5) but lacking previously reported SPTBN2 mutations, was identified. DNA was collected from seven individuals across two generations and the SPTBN2 gene on chromosome 11 was sequenced. A nonsynonymous heterozygous substitution in exon 12 was detected in individuals diagnosed with SCA5 while unaffected family members did not possess this variant. The identified c.1415C>T variant results in a p.T472M substitution in the second SPEC domain of the beta-III spectrin protein. The threonine at position 472 is not in close proximity to the characteristic residues that define the SPEC domain and is variable across diverse SPEC domains, yet is highly conserved in SPTBN2. Consistent with these observations, bioinformatic analysis of the p.T472M variant suggests it to be pathological. Two deletions within the SPTBN2 SPEC domains (E532_M544del and L629_R634delinsW) have been previously reported to cause SCA5, but this is the first missense mutation in this region of the protein shown to likely be pathogenic.
Starting Page	162
Ending Page	164
Page Count	3
File Format	PDF
ISSN	14734222
Journal	The Cerebellum
Volume Number	12
Issue Number	2
e-ISSN	14734230
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-07-29
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ataxia SCA5 SPTBN2 Neurosciences Neurology Neurobiology
Content Type	Text
Resource Type	Article
Subject	Neurology Neurology (clinical)

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