Overview

Pathogenicity: Frontotemporal Dementia : Not Classified
Clinical Phenotype: Frontotemporal Dementia
Position: (GRCh38/hg38):Chr1:226888846 A>G
Position: (GRCh37/hg19):Chr1:227076547 A>G
dbSNP ID: rs200410369
Coding/Non-Coding: Coding
DNA Change: Substitution
Expected RNA Consequence: Substitution
Expected Protein Consequence: Missense
Codon Change: TAC to TGC
Reference Isoform: PSEN2 Isoform 1 (448 aa)
Genomic Region: Exon 8

Findings

This variant was found in a U.K. genetic screen of more than 3,000 samples of patients with dementia (Koriath et al., 2018). The carrier was an individual with early onset frontotemporal dementia.

The variant was found in the gnomAD variant database with an allele count of four. Its calculated penetrance was 5.08% (0.6, 45.1% CI).

Neuropathology
Unknown.

Biological Effect
The biological effect of this variant is unknown, but its PHRED-scaled CADD score, which integrates diverse information in silico, was above 20, suggesting a deleterious effect (CADD v.1.6, Jan 2022). Koriath and colleagues classified the variant as possibly deleterious (Koriath et al., 2018).

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References

Paper Citations

1. Koriath C, Kenny J, Adamson G, Druyeh R, Taylor W, Beck J, Quinn L, Mok TH, Dimitriadis A, Norsworthy P, Bass N, Carter J, Walker Z, Kipps C, Coulthard E, Polke JM, Bernal-Quiros M, Denning N, Thomas R, Raybould R, Williams J, Mummery CJ, Wild EJ, Houlden H, Tabrizi SJ, Rossor MN, Hummerich H, Warren JD, Rowe JB, Rohrer JD, Schott JM, Fox NC, Collinge J, Mead S. Predictors for a dementia gene mutation based on gene-panel next-generation sequencing of a large dementia referral series. Mol Psychiatry. 2018 Oct 2; PubMed.

Further Reading

No Available Further Reading