Loss-of-Function Mutations in UNC45A Cause a Syndrome Associating Cholestasis, Diarrhea, Impaired Hearing, and Bone Fragility

Clothilde Esteve 1 Ludmila Francescatto Perciliz Tan Aurélie Bourchany 2 Cécile de Leusse Evelyne Marinier 3 Arnaud Blanchard 1 Patrice Bourgeois 1, 4 Céline Brochier-Armanet 5 Ange-Line Bruel 6 Arnauld Delarue 7 Yannis Duffourd 6 Emmanuel Ecochard-Dugelay Géraldine Héry 8, 9 Frédéric Huet 10 Philippe Gauchez Emmanuel Gonzales 11 Catherine Guettier-Bouttier Mina Komuta Caroline Lacoste 1, 12 Raphaelle Maudinas Karin Mazodier Yves Rimet Jean-Baptiste Riviere 6 Bertrand Roquelaure 13 Sabine Sigaudy 14, 1 Xavier Stephenne Christel Thauvin-Robinet 15 Julien Thevenon 10 Jacques Sarles 16 Nicolas Lévy 14, 1 Catherine Badens 17, 1, 14 Olivier Goulet 18 Jean-Pierre Hugot 19 Nicholas Katsanis 20 Laurence Faivre 6 Alexandre Fabre 1, 8
Abstract : Despite the rapid discovery of genes for rare genetic disorders, we continue to encounter individuals presenting with syndromic manifestations. Here, we have studied four affected people in three families presenting with cholestasis, congenital diarrhea, impaired hearing, and bone fragility. Whole-exome sequencing of all affected individuals and their parents identified biallelic mutations in Unc-45 Myosin Chaperone A (UNC45A) as a likely driver for this disorder. Subsequent in vitro and in vivo functional studies of the candidate gene indicated a loss-of-function paradigm, wherein mutations attenuated or abolished protein activity with concomitant defects in gut development and function.
Keywords : GCUNC-45
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Journal articles
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Submitted on : Friday, March 2, 2018 - 11:08:23 AM
Last modification on : Tuesday, August 20, 2019 - 5:12:02 PM

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Clothilde Esteve, Ludmila Francescatto, Perciliz Tan, Aurélie Bourchany, Cécile de Leusse, et al.. Loss-of-Function Mutations in UNC45A Cause a Syndrome Associating Cholestasis, Diarrhea, Impaired Hearing, and Bone Fragility. American Journal of Human Genetics, Elsevier (Cell Press), 2018, 102 (3), pp.364 - 374. ⟨10.1016/j.ajhg.2018.01.009⟩. ⟨hal-01721495⟩

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