Mutations

PSEN1 P88H

Overview

Pathogenicity: Alzheimer's Disease : Pathogenic
Clinical Phenotype: Alzheimer's Disease
Reference Assembly: GRCh37 (105)
Position: Chr14:73637680 C>T
dbSNP ID: NA
Coding/Non-Coding: Coding
Mutation Type: Point, Missense
Codon Change: CCT to CAT
Reference Isoform: PSEN1 isoform 1 (467 aa)
Genomic Region: Exon 4

Findings

This mutation was identified in a screen of patients with early onset AD from 28 French hospitals (Lanoiselée et al., 2017). Families were included when at least two first-degree relatives, spanning two generations, suffered from early onset AD with an age of onset of 65 years or younger. Age at onset in this pedigree ranged from 42 to 45 years and disease duration from two to five years. The clinical presentation was mainly progressive cognitive decline. Only the proband was confirmed as a mutation carrier. The mutation was absent from the exome database ExAC, including ~60,000 controls.

Neuropathology
Unknown

Biological Effect
The biological effect of this mutation is unknown, but another mutation at this site, PSEN1 P88L, was reported to co-segregate with AD and alter Aβ peptide production.
Based on the pathogenicity criteria developed by Guerreiro and colleagues (Guerreiro et al., 2010), this mutation was classified as probably pathogenic (Lanoiselée et al., 2017).

Last Updated: 31 May 2019

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References

Mutations Citations

  1. PSEN1 P88L

Paper Citations

  1. . APP, PSEN1, and PSEN2 mutations in early-onset Alzheimer disease: A genetic screening study of familial and sporadic cases. PLoS Med. 2017 Mar;14(3):e1002270. Epub 2017 Mar 28 PubMed.
  2. . Genetic screening of Alzheimer's disease genes in Iberian and African samples yields novel mutations in presenilins and APP. Neurobiol Aging. 2010 May;31(5):725-31. Epub 2008 Jul 30 PubMed.

Further Reading

No Available Further Reading

Protein Diagram

Primary Papers

  1. . APP, PSEN1, and PSEN2 mutations in early-onset Alzheimer disease: A genetic screening study of familial and sporadic cases. PLoS Med. 2017 Mar;14(3):e1002270. Epub 2017 Mar 28 PubMed.

Other mutations at this position

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