A novel mutation in the β-protein coding region of the amyloid β-protein precursor (APP) gene
✍ Scribed by Milagros Balbín; Magnus Abrahamson; Lars Gustafson; Karin Nilsson; Arne Brun; Anders Grubb
- Publisher
- Springer
- Year
- 1992
- Tongue
- English
- Weight
- 329 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0340-6717
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✦ Synopsis
A novel mutation, a C to T transition at base pair 2124 in exon 17 of the amyloid beta-protein precursor (APP) gene, has been identified by direct sequencing of amplified DNA from two Alzheimer's disease (AD) patients. A simple oligonucleotide-hybridization procedure was developed to allow population studies of this DNA variation. The mutation, which is silent at the protein level, was present in 2 out of 12 investigated AD patients, in 1 out of 60 non-AD patients and in 1 out of 30 healthy individuals. The mutation can be used as a new marker for linkage studies involving the APP gene, although more comprehensive population studies are required to determine the status of the mutation as a possible risk factor for the development of AD.
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BACE1 cleaves the amyloid precursor protein (APP) at the b-cleavage site (Met 671 -Asp 672 ) to initiate the generation of amyloid peptide Ab. BACE1 is also known to cleave APP at a much less well-characterized b 0 -cleavage site (Tyr 681 -Glu 682 ). We describe here the identification of a novel AP
The main component of the amyloid plaques found in the brains of those with Alzheimer's disease (AD) is a polymerized form of the b-amyloid peptide (Ab) and is considered to play a central role in the pathogenesis of this neurodegenerative disorder. Ab is derived from the proteolytic processing of t