Is CDH1 p.Arg868Ser (c.2602C>A) pathogenic?

CDH1 p.Arg868Ser (c.2602C>A) is classified Uncertain significance in CDH1 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2025-04-21). AlphaMissense: likely pathogenic (0.9746); Very rare (popmax 0.00267%, afr); Associated with hereditary diffuse gastric adenocarcinoma.

What condition is associated with CDH1 p.Arg868Ser (c.2602C>A)?

CDH1 p.Arg868Ser (c.2602C>A) is associated with hereditary diffuse gastric adenocarcinoma, prostate cancer, hereditary neoplastic syndrome (ClinVar).

How common is CDH1 p.Arg868Ser (c.2602C>A) in the general population?

CDH1 p.Arg868Ser (c.2602C>A) is very rare (popmax 0.00267%, afr) (gnomAD).

How is Hereditary diffuse gastric cancer inherited?

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

What do computational predictors say about CDH1 p.Arg868Ser (c.2602C>A)?

AlphaMissense predicts likely pathogenic (score 0.9746) — an in-silico prediction, not a clinical call.

CDH1 p.Arg868Ser

c.2602C>A · rs864622630 · VCV479500

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

AlphaMissense

likely pathogenic

0.9746 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary diffuse gastric adenocarcinoma

Computational evidence

Protein change
AlphaMissense	0.9746	likely pathogenic · top 7% in CDH1
REVEL	0.68	pathogenic-leaning
SaProt	LLR -13.16	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 1.9, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 25 kb · p 0.00015 · regional, not allelic
Overall
CADD	28.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,914 alleles

Filtering AF 0.000443% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.00131% 2/152,122 alleles · very rare

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: CDH1
Protein: p.Arg868Ser
Coding: c.2602C>A
MANE Select: NM_004360
dbSNP: rs864622630
Type: single nucleotide variant
Location: chr16:68833452 (GRCh38)
Gene constraint: LOEUF 0.514 · pLI 0.86 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 79.13 · 22 PDB
Residue 868: the 'required for binding alpha, beta and gamma catenins' region

Full CDH1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary diffuse gastric adenocarcinoma — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: prostate cancer hereditary neoplastic syndrome hereditary breast carcinoma blepharocheilodontic syndrome 1

For Hereditary diffuse gastric cancer (Orphanet):

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

Similar variants

CDH1 p.Arg868Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
CDH1 p.Arg868Gly Uncertain significance ★ ⚠ same residue
CDH1 p.Arg868His Conflicting classifications of pathogenicity ★ ⚠ same residue
CDH1 p.Arg868= Benign ★ same residue
CDH1 p.Arg868fs Uncertain significance ★★ same residue
CDH1 c.1008+2T>C Likely pathogenic ★★★ same condition
CDH1 c.1137+1G>A Pathogenic ★★★ same condition
CDH1 c.1137+2T>C Likely pathogenic ★★★ 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/cdh1-p-arg868ser (accessed [today's date]).

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