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Pediatr Dermatol. 2013 Jan-Feb;30(1):139-41. doi: 10.1111/j.1525-1470.2011.01587.x. Epub 2012 Feb 3.

A novel nonsense mutation in RSPO4 gene underlies autosomal recessive congenital anonychia in a Pakistani family.

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1
Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.

Abstract

Congenital anonychia is an inherited autosomal recessive disorder characterized by complete absence of fingernails or toenails, or both. In the present study, we have described a consanguineous Pakistani family having a family member affected with congenital anonychia. Genotyping using polymorphic microsatellite markers showed linkage of the family to gene RSPO4 encoding R-spondin and mapped on human chromosome 20p13. Deoxyribonucleic acid sequence analysis of the gene identified a novel nonsense mutation (c.18C>A; p.Cys6X) in the affected family member.

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