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Título

The USH2A c.2299delG mutation: dating its common origin in a Southern European population

Otros títulosAllelic age of the USH2A c.2299delG mutation
AutorAller, Elena; Larrieu, Lise; Jaijo, Teresa; Baux, David; Espinós, Carmen ; González-Candelas, Fernando; Nájera, Carmen; Palau Martínez, Francesc ; Claustres, Mireille; Roux, Anne-Françoise; Millán, José M.
Palabras claveUSH2A
c.2299delG
Haplotype
Dating
Fecha de publicación2010
EditorNature Publishing Group
European Society of Human Genetics
CitaciónEuropean journal of human genetics 18(7): 788-93 (2010)
ResumenUsher syndrome type II is the most common form of Usher syndrome. USH2A is the main responsible gene of the three known to be disease causing. It encodes two isoforms of the protein usherin. This protein is part of an interactome that plays an essential role in the development and function of inner ear hair cells and photoreceptors. The gene contains 72 exons spanning over a region of 800 kb. Although numerous mutations have been described, the c.2299delG mutation is the most prevalent in several populations. Its ancestral origin was previously suggested after the identification of a common core haplotype restricted to 250 kb in the 5´ region, which encodes the short usherin isoform. By extending the haplotype analysis over the 800 kb region of the USH2A gene with a total of 14 intragenic SNPs, we have been able to define 10 different c.2299delG haplotypes showing high variability but preserving the previously described core haplotype. An exhaustive c.2299delG/control haplotype study suggests that the major source of variability in the USH2A gene is recombination. Furthermore, we have evidenced twice the amount of recombination hotspots located in the 500 kb that covers the 3´ end of the gene, explaining the higher variability observed in this region when compared to the 250 kb of the 5’ region. Our data confirm the common ancestral origin of the c.2299delG mutation.
Descripción24 p., figuras y bibliografía
Versión del editorhttp://dx.doi.org/10.1038/ejhg.2010.14
URIhttp://hdl.handle.net/10261/41814
DOI10.1038/ejhg.2010.14
ISSN1018-4813
E-ISSN1476-5438
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