Is CDH1 p.Ile566Val (c.1696A>G) pathogenic?

CDH1 p.Ile566Val (c.1696A>G) is classified Conflicting classifications of pathogenicity in CDH1 (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2025-09-17). AlphaMissense: likely benign (0.0833); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with CDH1 p.Ile566Val (c.1696A>G)?

CDH1 p.Ile566Val (c.1696A>G) is associated with hereditary neoplastic syndrome, hereditary diffuse gastric adenocarcinoma (ClinVar).

How common is CDH1 p.Ile566Val (c.1696A>G) in the general population?

CDH1 p.Ile566Val (c.1696A>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CDH1 p.Ile566Val (c.1696A>G)?

AlphaMissense predicts likely benign (score 0.0833) — an in-silico prediction, not a clinical call.

CDH1 p.Ile566Val

c.1696A>G · rs775941240 · VCV575212

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0833 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.0833	likely benign
REVEL	0.149	moderately benign-leaning
SaProt	LLR -5.96	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.7	GERP 0.65, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 25 kb · p 0.00015 · regional, not allelic
Overall
CADD	8.785	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CDH1
Protein: p.Ile566Val
Coding: c.1696A>G
MANE Select: NM_004360
dbSNP: rs775941240
Type: single nucleotide variant
Location: chr16:68819410 (GRCh38)
Gene constraint: LOEUF 0.514 · pLI 0.86 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 79.13 · 22 PDB
Residue 566: the cadherin 4 domain; a β-strand

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary diffuse gastric adenocarcinoma

Similar variants

CDH1 p.Ile566Arg Uncertain significance ★★ ⚠ same residue
CDH1 p.Ile566Leu Uncertain significance ★ ⚠ same residue
CDH1 p.Ile566Thr Conflicting classifications of pathogenicity ★ ⚠ same residue
CDH1 p.Ile566fs Pathogenic ★ 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
CDH1 c.1320+1G>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-ile566val (accessed [today's date]).

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