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@ARTICLE{Seixas:139358,
author = {Seixas, Ana I and Loureiro, Joana R and Costa, Cristina and
Ordóñez-Ugalde, Andrés and Marcelino, Hugo and Oliveira,
Cláudia L and Loureiro, José L and Dhingra, Ashutosh and
Brandão, Eva and Cruz, Vitor T and Timóteo, Angela and
Quintáns, Beatriz and Rouleau, Guy A and Rizzu, Patrizia
and Carracedo, Ángel and Bessa, José and Heutink, Peter
and Sequeiros, Jorge and Sobrido, Maria J and Coutinho,
Paula and Silveira, Isabel},
title = {{A} {P}entanucleotide {ATTTC} {R}epeat {I}nsertion in the
{N}on-coding {R}egion of {DAB}1, {M}apping to {SCA}37,
{C}auses {S}pinocerebellar {A}taxia.},
journal = {The American journal of human genetics},
volume = {101},
number = {1},
issn = {0002-9297},
address = {New York, NY},
publisher = {Elsevier},
reportid = {DZNE-2020-05680},
pages = {87-103},
year = {2017},
abstract = {Advances in human genetics in recent years have largely
been driven by next-generation sequencing (NGS); however,
the discovery of disease-related gene mutations has been
biased toward the exome because the large and very
repetitive regions that characterize the non-coding genome
remain difficult to reach by that technology. For
autosomal-dominant spinocerebellar ataxias (SCAs), 28 genes
have been identified, but only five SCAs originate from
non-coding mutations. Over half of SCA-affected families,
however, remain without a genetic diagnosis. We used
genome-wide linkage analysis, NGS, and repeat analysis to
identify an (ATTTC)n insertion in a polymorphic ATTTT repeat
in DAB1 in chromosomal region 1p32.2 as the cause of
autosomal-dominant SCA; this region has been previously
linked to SCA37. The non-pathogenic and pathogenic alleles
have the configurations [(ATTTT)7-400] and
[(ATTTT)60-79(ATTTC)31-75(ATTTT)58-90], respectively.
(ATTTC)n insertions are present on a distinct haplotype and
show an inverse correlation between size and age of onset.
In the DAB1-oriented strand, (ATTTC)n is located in 5' UTR
introns of cerebellar-specific transcripts arising mostly
during human fetal brain development from the usage of
alternative promoters, but it is maintained in the adult
cerebellum. Overexpression of the transfected (ATTTC)58
insertion, but not (ATTTT)n, leads to abnormal nuclear RNA
accumulation. Zebrafish embryos injected with RNA of the
(AUUUC)58 insertion, but not (AUUUU)n, showed lethal
developmental malformations. Together, these results
establish an unstable repeat insertion in DAB1 as a cause of
cerebellar degeneration; on the basis of the genetic and
phenotypic evidence, we propose this mutation as the
molecular basis for SCA37.},
keywords = {Reelin Protein / Adaptor Proteins, Signal Transducing:
genetics / Adaptor Proteins, Signal Transducing: metabolism
/ Adolescent / Adult / Age of Onset / Alleles / Base
Sequence / Cerebellum: metabolism / Chromosome Segregation:
genetics / Chromosomes, Human, Pair 1: genetics / DNA
Mutational Analysis / DNA, Intergenic: genetics / Embryonic
Development: genetics / Female / Genetic Predisposition to
Disease / HEK293 Cells / Haplotypes: genetics / Humans /
Introns: genetics / Male / Microsatellite Repeats: genetics
/ Middle Aged / Mutagenesis, Insertional: genetics / Nerve
Tissue Proteins: genetics / Nerve Tissue Proteins:
metabolism / Pedigree / Physical Chromosome Mapping / RNA:
genetics / RNA, Messenger: genetics / RNA, Messenger:
metabolism / Spinocerebellar Ataxias: genetics / Young Adult
/ Adaptor Proteins, Signal Transducing (NLM Chemicals) /
DAB1 protein, human (NLM Chemicals) / DNA, Intergenic (NLM
Chemicals) / Nerve Tissue Proteins (NLM Chemicals) / RNA,
Messenger (NLM Chemicals) / RNA (NLM Chemicals)},
cin = {AG Rizzu / AG Heutink},
ddc = {570},
cid = {I:(DE-2719)1210009 / I:(DE-2719)1210002},
pnm = {342 - Disease Mechanisms and Model Systems (POF3-342) / 345
- Population Studies and Genetics (POF3-345)},
pid = {G:(DE-HGF)POF3-342 / G:(DE-HGF)POF3-345},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:28686858},
pmc = {pmc:PMC5501871},
doi = {10.1016/j.ajhg.2017.06.007},
url = {https://pub.dzne.de/record/139358},
}