A common flanking variant is associated with enhanced stability of the FGF14-SCA27B repeat locus.
Fiche publication
Date publication
juin 2024
Journal
Nature genetics
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BONNET Céline
Tous les auteurs :
Pellerin D, Del Gobbo GF, Couse M, Dolzhenko E, Nageshwaran SK, Cheung WA, Xu IRL, Dicaire MJ, Spurdens G, Matos-Rodrigues G, Stevanovski I, Scriba CK, Rebelo A, Roth V, Wandzel M, Bonnet C, Ashton C, Agarwal A, Peter C, Hasson D, Tsankova NM, Dewar K, Lamont PJ, Laing NG, Renaud M, Houlden H, Synofzik M, Usdin K, Nussenzweig A, Napierala M, Chen Z, Jiang H, Deveson IW, Ravenscroft G, Akbarian S, Eberle MA, Boycott KM, Pastinen T, , Brais B, Zuchner S, Danzi MC
Lien Pubmed
Résumé
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.
Référence
Nat Genet. 2024 06 27;: