Abstract
Gnathodiaphyseal dysplasia (GDD) is an autosomal dominant syndrome characterized by frequent bone fractures at a young age, bowing of tubular bones and cemento-osseus lesions of the jawbones. Anoctamin 5 (ANO5) belongs to the anoctamin protein family that includes calcium-activated chloride channels. However, recent data together with our own experiments reported here add weight to the hypothesis that ANO5 may not function as calcium-activated chloride channel. By sequencing the entire ANO5 gene coding region and untranslated regions in a large Italian GDD family, we found a novel missense mutation causing the p.Thr513Ile substitution. The mutation segregates with the disease in the family and has never been described in any database as a polymorphism. To date, only two mutations on the same cysteine residue at position 356 of ANO5 amino-acid sequence have been described in GDD families. As ANO5 has also been found to be mutated in two different forms of muscular dystrophy, the finding of this third mutation in GDD adds clues to the role of ANO5 in these disorders.
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Acknowledgements
We acknowledge the Italian Ministry of Health, Strategic Program, RFPS-4-631972 ‘Genetic Bases of Birth Defects’ for the financial support. We remember Dr Gianni Camera who passed away 7 years ago. He had in charge the family, characterized at clinical level some of the affected members and collected all the samples. We thank him for encouraging this study and for his enthusiastic attitude he always shared with us.
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Marconi, C., Brunamonti Binello, P., Badiali, G. et al. A novel missense mutation in ANO5/TMEM16E is causative for gnathodiaphyseal dyplasia in a large Italian pedigree. Eur J Hum Genet 21, 613–619 (2013). https://doi.org/10.1038/ejhg.2012.224
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DOI: https://doi.org/10.1038/ejhg.2012.224
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