Deletion in the FMR1 gene in a fragile-X male
- Kuopio Univ., Hospital (Finland); and others
The pathogenesis of fragile-X syndrome is a consequence of absence of the FMR1 gene product associated with expansion of the CGG repeat and abnormal methylation of this and a CpG island 250 hp proximal to the CGG repeat located at exon 1 in the FMR1 gene. While this is usually the case, some suspected fragile-X syndrome patients have been described with a mutation other than CGG expansion. We describe here an affected fragile-X male, who was found to be mosaic of a full mutation of the CGG expansion and a deletion in the FMR1 gene. The patient`s phenotype is probably mainly due to the effect of the full mutation of the repeat sequence. Thus, the influence of the deletion is difficult to evaluate. 20 refs., 2 figs.
- OSTI ID:
- 478884
- Journal Information:
- American Journal of Medical Genetics, Vol. 64, Issue 2; Other Information: PBD: 9 Aug 1996
- Country of Publication:
- United States
- Language:
- English
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