Is PSEN2 p.Pro287= (c.861C>T) pathogenic?

PSEN2 p.Pro287= (c.861C>T) is classified Benign/Likely benign in PSEN2 (ClinVar, Multiple submitters, 8 submitters; last evaluated 2026-01-21). Common (popmax 7.7%, eas) — too common for a highly-penetrant pathogenic allele; Associated with Alzheimer disease 4.

What condition is associated with PSEN2 p.Pro287= (c.861C>T)?

PSEN2 p.Pro287= (c.861C>T) is associated with Alzheimer disease 4, dilated cardiomyopathy 1V (ClinVar).

PSEN2 p.Pro287=

Q: How common is PSEN2 p.Pro287= (c.861C>T) in the general population?

PSEN2 p.Pro287= (c.861C>T) is common (popmax 7.7%, eas) — too common for a highly-penetrant pathogenic allele (gnomAD).

Q: How is Early-onset autosomal dominant Alzheimer disease inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.861C>T · rs75733498 · VCV295992

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 8 submitters

gnomAD v4.1

Common

common (popmax 7.7%, eas) — too common for a highly-penetrant pathogenic allele

Conditions

Alzheimer disease 4

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.2	GERP -2.7, phastCons 1
Overall
CADD	12.39	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 7.7% East Asian · 3,456/44,874 alleles

Filtering AF 7.49% ClinGen BA1/BS1 input FAF95, joint · FAF99 7.4%

Overall 0.647% 10,446/1,613,914 alleles · common

Ancestry group	Frequency	1 in
East Asiangrpmax	7.7%	13
South Asian	3.91%	26
Admixed American	3.9%	26
Remaining individualsnot grpmax-eligible	0.795%	126
Finnishnot grpmax-eligible	0.162%	616
Middle Eastern	0.148%	674
Ashkenazi Jewishnot grpmax-eligible	0.0405%	2,467
European (non-Finnish)	0.0378%	2,645
African / African-American	0.0293%	3,411

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: PSEN2
Protein: p.Pro287=
Coding: c.861C>T
MANE Select: NM_000447
dbSNP: rs75733498
Type: single nucleotide variant
Location: chr1:226890108 (GRCh38)
Gene constraint: LOEUF 0.85 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 71.99 · 2 PDB

Full PSEN2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Alzheimer disease 4 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: dilated cardiomyopathy 1V

For Early-onset autosomal dominant Alzheimer disease (Orphanet):

Inheritance: Autosomal dominant
Onset: Adult
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

PSEN2 p.Asn141Ile Pathogenic ★★ same condition
PSEN2 p.Thr122Pro Pathogenic/Likely pathogenic ★★ same condition
PSEN2 c.*20G>A Uncertain significance ★★ same condition
PSEN2 p.Ala258Thr Uncertain significance ★★ ⚠ same condition
PSEN2 p.Ala291Val Uncertain significance ★★ ⚠ same condition
PSEN2 p.Arg110Cys Uncertain significance ★★ ⚠ same condition
PSEN2 p.Arg29Cys Uncertain significance ★★ ⚠ same condition
PSEN2 p.Arg435Gln Uncertain significance ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/psen2-p-pro287 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown