Is CHEK2 p.Pro92Arg (c.275C>G) pathogenic?

CHEK2 p.Pro92Arg (c.275C>G) is classified Uncertain significance in CHEK2 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-07-25). AlphaMissense: ambiguous (0.4208); Very rare (popmax 0.00167%, amr); Associated with hereditary neoplastic syndrome.

What condition is associated with CHEK2 p.Pro92Arg (c.275C>G)?

CHEK2 p.Pro92Arg (c.275C>G) is associated with hereditary neoplastic syndrome, hereditary breast carcinoma (ClinVar).

How common is CHEK2 p.Pro92Arg (c.275C>G) in the general population?

CHEK2 p.Pro92Arg (c.275C>G) is very rare (popmax 0.00167%, amr) (gnomAD).

What do computational predictors say about CHEK2 p.Pro92Arg (c.275C>G)?

AlphaMissense predicts ambiguous (score 0.4208) — an in-silico prediction, not a clinical call.

CHEK2 p.Pro92Arg

c.275C>G · rs779269031 · VCV410028

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

AlphaMissense

ambiguous

0.4208 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.4208	ambiguous
REVEL	0.429	indeterminate
SaProt	LLR -16.41	damaging
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.5, phastCons 1
Regional constraint	o/e 1.02	unconstrained · MANE · 47 kb · p 0.57 · regional, not allelic
Overall
CADD	25.2	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

Grpmax group 0.00167% Admixed American · 1/60,002 alleles

Overall 6.84e-05% 1/1,461,808 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: CHEK2
Protein: p.Pro92Arg
Coding: c.275C>G
MANE Select: NM_007194
dbSNP: rs779269031
Type: single nucleotide variant
Location: chr22:28734447 (GRCh38)
Gene constraint: LOEUF 1.399 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.64 · 38 PDB
Residue 92: an α-helix

Full CHEK2 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 breast carcinoma

Similar variants

CHEK2 p.Pro92His Uncertain significance ★★ same residue
CHEK2 p.Pro92Leu Uncertain significance ★★ ⚠ same residue
CHEK2 p.Pro92Ser Uncertain significance ★★ ⚠ same residue
CHEK2 p.Pro92Thr Uncertain significance ★★ ⚠ same residue
CHEK2 p.Pro92= Benign ★ same residue
CHEK2 p.Pro92fs Pathogenic ★ same residue
CHEK2 p.Pro92Ala Uncertain significance ★ ⚠ same residue
CHEK2 c.1008+1G>A 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/chek2-p-pro92arg (accessed [today's date]).

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