PABPN1 (GCN)11 as a Dominant Allele in Oculopharyngeal Muscular Dystrophy –Consequences in Clinical Diagnosis and Genetic Counselling

Abstract excerpt

Oculopharyngeal muscular dystrophy (OPMD) is mainly characterized by ptosis and dysphagia. The genetic cause is a short expansion of a (GCN)10 repeat encoding for polyalanine in the poly(A) binding protein nuclear 1 (PABPN1) gene to (GCN)12-17 repeats. The (GCN)11/Ala11 allele has so far been described to be either a polymorphism or a recessive allele with no effect on the phenotype in the heterozygous state....

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