A common flanking variant is associated with enhanced stability of the FGF14-SCA27B repeat locus.
Nat Genet
; 56(7): 1366-1370, 2024 Jul.
Article
em En
| MEDLINE
| ID: mdl-38937606
ABSTRACT
The factors driving or preventing pathological expansion of tandem repeats remain largely unknown. Here, we assessed the FGF14 (GAA)·(TTC) repeat locus in 2,530 individuals by long-read and Sanger sequencing and identified a common 5'-flanking variant in 70.34% of alleles analyzed (3,463/4,923) that represents the phylogenetically ancestral allele and is present on all major haplotypes. This common sequence variation is present nearly exclusively on nonpathogenic alleles with fewer than 30 GAA-pure triplets and is associated with enhanced stability of the repeat locus upon intergenerational transmission and increased Fiber-seq chromatin accessibility.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Alelos
/
Fatores de Crescimento de Fibroblastos
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article