Pathogenicity: Alzheimer's Disease : Pathogenic
Clinical Phenotype: Alzheimer's Disease
Reference Assembly: GRCh37 (105)
Position: Chr14:73640278 T>G
dbSNP ID: rs63749962
Coding/Non-Coding: Coding
Genomic Region: Exon 5
Mutation Type: Point, Missense
Codon Change: TAT to GAT


This mutation was detected in a single individual with early onset dementia. Symptoms occurred very early, at age 29 in the proband and age 31 in the proband’s affected father. The proband’s father died at age 44 (unpublished findings; personal communication T.D. Bird, 2014). The Y115D mutation is considered likely to be pathogenic given the early age of onset in the two affected family members and the fact that two other pathogenic mutations have been reported at codon 115 (Y115C and Y115H).


Postmortem examination showed neuropathology consistent with AD.

Biological Effect



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Mutations Citations

  1. PSEN1 Y115C
  2. PSEN1 Y115H

Further Reading

Learn More

  1. Alzheimer Disease & Frontotemporal Dementia Mutation Database

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Other mutations at this position