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Genetic and physical mapping of the Treacher Collins syndrome locus: refinement of the localization to chromosome 5q32-33.2

MJ Dixon, J Dixon, D Raskova, Beau MM Le, R Williamson, K Klinger, GM Landes

. 1992 ; 1 (4) : 249-53.

Jazyk angličtina Země Anglie, Velká Británie

Perzistentní odkaz   https://www.medvik.cz/link/bmc14042236

Grantová podpora
IZ2891 MZ0 CEP - Centrální evidence projektů

Treacher Collins syndrome (TCOF1) is an autosomal dominant disorder of craniofacial development, the locus for which has been chromosomally localized to 5q31-34. We have isolated four hypervariable microsatellite markers (heterozygosity values range from 0.70 to 0.89) which have been mapped to distal 5q. Fifteen unrelated TCOF1 families have been analyzed for linkage to these markers. There is strong evidence demonstrating linkage to all of these markers; the strongest support for positive linkage being provided by the marker IG52, with a maximum pairwise lod score of 9.77 at a recombination fraction of 0.055. Analysis of recombinant individuals, physical mapping by fluorescence in situ hybridization and genetic linkage analysis demonstrated that the TCOF1 locus was flanked proximally by the loci 2C7 and 2D10, and distally by the loci IG26 and IG52 with a maximum lod score of 14.4, as assessed by multipoint linkage analysis. The refinement of the localization of the TCOF1 locus to 5q32-33.2, with flanking markers, represents an important step towards the identification of the mutated gene itself.

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$a Treacher Collins syndrome (TCOF1) is an autosomal dominant disorder of craniofacial development, the locus for which has been chromosomally localized to 5q31-34. We have isolated four hypervariable microsatellite markers (heterozygosity values range from 0.70 to 0.89) which have been mapped to distal 5q. Fifteen unrelated TCOF1 families have been analyzed for linkage to these markers. There is strong evidence demonstrating linkage to all of these markers; the strongest support for positive linkage being provided by the marker IG52, with a maximum pairwise lod score of 9.77 at a recombination fraction of 0.055. Analysis of recombinant individuals, physical mapping by fluorescence in situ hybridization and genetic linkage analysis demonstrated that the TCOF1 locus was flanked proximally by the loci 2C7 and 2D10, and distally by the loci IG26 and IG52 with a maximum lod score of 14.4, as assessed by multipoint linkage analysis. The refinement of the localization of the TCOF1 locus to 5q32-33.2, with flanking markers, represents an important step towards the identification of the mutated gene itself.
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$a Le Beau, Michelle M.
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