In-Frame Mutations in Exon 1 of SKI Cause Dominant Shprintzen-Goldberg Syndrome

Virginie Carmignac 1 Julie Thevenon Lesley Ades 2 Bert Callewaert 3 Sophie Julia 4 Christel Thauvin-Robinet 5 Lucie Gueneau 6 Jean-Benoît Courcet 7 Estelle Lopez 8 Katherine Holman 9 Marjolijn Renard Henri Plauchu 10 Ghislaine Plessis 11 Julie De Backer 12 Anne Child 13 Gavin Arno 13 Laurence Duplomb 14 Patrick Callier 15 Bernard Aral 16 Pierre Vabres 17 Nadège Gigot 6 Eloisa Arbustini 18 Maurizia Grasso 19 Peter N Robinson Cyril Goizet 20 Clarisse Baumann 21 Maja Di Rocco Jaime Sanchez del Pozo Frédéric Huet 22 Guillaume Jondeau 23 Gwenaëlle Collod-Béroud 24 Christophe Béroud 24 Jeanne Amiel Valérie Cormier-Daire 25 Jean-Baptiste Rivière 5 Catherine Boileau 23 Anne De Paepe 26 Laurence Faivre 15
Abstract : Shprintzen-Goldberg syndrome (SGS) is characterized by severe marfanoid habitus, intellectual disability, camptodactyly, typical facial dysmorphism, and craniosynostosis. Using family-based exome sequencing, we identified a dominantly inherited heterozygous in-frame deletion in exon 1 of SKI. Direct sequencing of SKI further identified one overlapping heterozygous in-frame deletion and ten heterozygous missense mutations affecting recurrent residues in 18 of the 19 individuals screened for SGS; these individuals included one family affected by somatic mosaicism. All mutations were located in a restricted area of exon 1, within the R-SMAD binding domain of SKI. No mutation was found in a cohort of 11 individuals with other marfanoid-craniosynostosis phenotypes. The interaction between SKI and Smad2/3 and Smad 4 regulates TGF-β signaling, and the pattern of anomalies in Ski-deficient mice corresponds to the clinical manifestations of SGS. These findings define SGS as a member of the family of diseases associated with the TGF-β-signaling pathway.
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American Journal of Human Genetics, Elsevier (Cell Press), 2012, 91 (5), pp.950 - 957. 〈10.1016/j.ajhg.2012.10.002〉
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Virginie Carmignac, Julie Thevenon, Lesley Ades, Bert Callewaert, Sophie Julia, et al.. In-Frame Mutations in Exon 1 of SKI Cause Dominant Shprintzen-Goldberg Syndrome. American Journal of Human Genetics, Elsevier (Cell Press), 2012, 91 (5), pp.950 - 957. 〈10.1016/j.ajhg.2012.10.002〉. 〈hal-01670135〉

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