Genomic rearrangements of EYA1 account for a large fraction of families with BOR syndrome.
Branchio-Oto-Renal (BOR) syndrome is transmitted as an autosomal dominant disorder, affects an estimated 2% of profoundly deaf children, and is caused by mutations in the human EYA1 gene. However, in up to half of the reported cases, EYA1 mutation screening is negative. This finding has been taken as evidence of genetic heterogeneity. Mutation screening of the coding region of EYA1 in a panel of families linked to chromosome 8 was conducted using SSCP and direct sequencing. Only one point mutation in five probands was detected. However, complex rearrangements, such as inversions or large deletions, were discovered in the other four patients using Southern blot analysis. These data suggest that more complex rearrangements may remain undetected in EYA1 since SSCP and sequencing were commonly used to detect mutations in this gene.
Vervoort
Virginie S
VS
Department of Genetics and Biochemistry, Clemson University, Clemson, SC 29654, USA.
Smith
Richard J H
RJ
O'Brien
Jane
J
Schroer
Richard
R
Abbott
Albert
A
Stevenson
Roger E
RE
Schwartz
Charles E
CE
D015139:Blotting, Southern; D015153:Blotting, Western; D019280:Branchio-Oto-Renal Syndrome / Q000235:genetics*; D007446:Chromosome Inversion; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D008297:Male; D009687:Nuclear Proteins; D010375:Pedigree; D018807:Polymorphism, Single-Stranded Conformational; D017027:Protein Tyrosine Phosphatases; D017422:Sequence Analysis, DNA; D017384:Sequence Deletion; D015534:Trans-Activators / Q000235:genetics*
D047908:Intracellular Signaling Peptides and Proteins; D009687:Nuclear Proteins; D015534:Trans-Activators; C104381:EYA1 protein, human; D017027:Protein Tyrosine Phosphatases