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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
7
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pubmed:dateCreated |
2010-6-17
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pubmed:abstractText |
Usher 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 has 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 that 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 single nucleotide polymorphisms, 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 region that covers the 3' end of the gene, explaining the higher variability observed in this region when compared with the 250 kb of the 5' region. Our data confirm the common ancestral origin of the c.2299delG mutation.
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
1476-5438
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pubmed:author |
pubmed-author:AllerElenaE,
pubmed-author:BauxDavidD,
pubmed-author:ClaustresMireilleM,
pubmed-author:EspinósCarmenC,
pubmed-author:González-CandelasFernandoF,
pubmed-author:JaijoTeresaT,
pubmed-author:LarrieuLiseL,
pubmed-author:MillánJosé MJM,
pubmed-author:NájeraCarmenC,
pubmed-author:PalauFrancescF,
pubmed-author:RouxAnne-FrançoiseAF
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pubmed:issnType |
Electronic
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pubmed:volume |
18
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
788-93
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pubmed:dateRevised |
2011-8-1
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pubmed:meshHeading |
pubmed-meshheading:20145675-Alleles,
pubmed-meshheading:20145675-European Continental Ancestry Group,
pubmed-meshheading:20145675-Extracellular Matrix Proteins,
pubmed-meshheading:20145675-Haplotypes,
pubmed-meshheading:20145675-Humans,
pubmed-meshheading:20145675-Linkage Disequilibrium,
pubmed-meshheading:20145675-Mutation,
pubmed-meshheading:20145675-Phylogeny,
pubmed-meshheading:20145675-Polymorphism, Single Nucleotide,
pubmed-meshheading:20145675-Usher Syndromes
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pubmed:year |
2010
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pubmed:articleTitle |
The USH2A c.2299delG mutation: dating its common origin in a Southern European population.
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pubmed:affiliation |
Unidad de Genética, Hospital Universitario La Fe, Valencia, Spain.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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