Mutations

PSEN1 V82L

Overview

Pathogenicity: Alzheimer's Disease : Pathogenic
Clinical Phenotype: Alzheimer's Disease
Reference Assembly: GRCh37 (105)
Position: Chr14:73637661 G>C
dbSNP ID: rs63749967
Coding/Non-Coding: Coding
Mutation Type: Point, Missense
Codon Change: GTG to CTG
Reference Isoform: PSEN1 isoform 1 (467 aa)
Genomic Region: Exon 4

Findings

This mutation was originally identified in a French family referred to as SAL 508. The three affected individuals, across three generations, presented with early-onset Alzheimer’s disease with onset ranging from 53 to 58 years of age. Autosomal-dominant transmission was confirmed by segregation analysis (Campion et al., 1995). This mutation was reported in 1995, the same year that the presenilin-1 gene was cloned (Sherrington et al., 1995).

Neuropathology

Unknown.

Biological Effect

In CHO and HEK-293 cells expressing APP695, the mutation resulted in a slightly lower ratio of secreted Aβ42/Aβ40 (Shioi et al., 2007). In an in vitro assay using purified proteins to test the mutant's ability to cleave the APP-C99 substrate, however, the Aβ42/Aβ40 ratio was similar to that produced by wild-type PSEN1. However, production of both Aβ42 and Aβ40 was reduced (Sun et al., 2017).

Last Updated: 27 Aug 2019

Comments

No Available Comments

Make a Comment

To make a comment you must login or register.

References

Paper Citations

  1. . Mutations of the presenilin I gene in families with early-onset Alzheimer's disease. Hum Mol Genet. 1995 Dec;4(12):2373-7. PubMed.
  2. . Cloning of a gene bearing missense mutations in early-onset familial Alzheimer's disease. Nature. 1995 Jun 29;375(6534):754-60. PubMed.
  3. . FAD mutants unable to increase neurotoxic Abeta 42 suggest that mutation effects on neurodegeneration may be independent of effects on Abeta. J Neurochem. 2007 May;101(3):674-81. Epub 2007 Jan 24 PubMed.
  4. . Analysis of 138 pathogenic mutations in presenilin-1 on the in vitro production of Aβ42 and Aβ40 peptides by γ-secretase. Proc Natl Acad Sci U S A. 2017 Jan 24;114(4):E476-E485. Epub 2016 Dec 5 PubMed.

Further Reading

Papers

  1. . Estimation of the genetic contribution of presenilin-1 and -2 mutations in a population-based study of presenile Alzheimer disease. Hum Mol Genet. 1998 Jan;7(1):43-51. PubMed.
  2. . Early-onset autosomal dominant Alzheimer disease: prevalence, genetic heterogeneity, and mutation spectrum. Am J Hum Genet. 1999 Sep;65(3):664-70. PubMed.

Learn More

  1. Alzheimer Disease & Frontotemporal Dementia Mutation Database

Protein Diagram

Primary Papers

  1. . Mutations of the presenilin I gene in families with early-onset Alzheimer's disease. Hum Mol Genet. 1995 Dec;4(12):2373-7. PubMed.

Alzpedia

Disclaimer: Alzforum does not provide medical advice. The Content is for informational, educational, research and reference purposes only and is not intended to substitute for professional medical advice, diagnosis or treatment. Always seek advice from a qualified physician or health care professional about any medical concern, and do not disregard professional medical advice because of anything you may read on Alzforum.