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  • Title: A novel splicing mutation of the ATRX gene in ATR-X syndrome.
    Author: Wada T, Sakakibara M, Fukushima Y, Saitoh S.
    Journal: Brain Dev; 2006 Jun; 28(5):322-5. PubMed ID: 16376512.
    Abstract:
    X-linked alpha-thalassemia/mental retardation syndrome (ATR-X, MIM#301040) is an X-linked recessive condition affecting males. ATR-X is characterized by severe mental retardation, mild HbH disease, dysmorphic facies, and genital and skeletal abnormalities. ATR-X is caused by mutations in the ATRX gene. Most mutations affect two functionally important domains, the ADD domain and the helicase domain. Here, we report on two brothers with the ATR-X phenotype without HbH disease; both had a mutation in the 5' upstream region of the ADD domain of the ATRX gene. This mutation was a G to T nucleotide substitution at the 3' end of exon 5 and resulted in splicing out of exons 5 and 6. Analysis of cDNA structure may clarify genotype-phenotype correlations in ATR-X because splicing mutation could be detectable only by cDNA analysis.
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