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Early-onset Alzheimer's disease caused by mutations at codon 717 of the beta-amyloid precursor protein gene.

Chartier-Harlin M.-C., Crawford F., Houlden H., Warren A., Hughes D., Fidani L., Goate A., Rossor M., Roques P., Hardy J., Mullan M., et al.

A mutation at codon 717 of the beta-amyloid precursor protein gene has been found to cosegregate with familial Alzheimer's disease in a single family. This mutation has been reported in a further five out of approximately 100 families multiply affected by Alzheimer's disease. We have identified another family, F19, in which we have detected linkage between the beta-amyloid precursor protein gene and Alzheimer's disease. Direct sequencing of exon 17 in affected individuals from this family has revealed a base change producing a Val----Gly substitution, also at codon 717. The occurrence of a second allelic variant at codon 717 linked to the Alzheimer's phenotype supports the hypothesis that they are pathogenic mutations.

Nature 353:844-846(1991) [PubMed] [Europe PMC]

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