Is CHEK2 p.Arg523= (c.1569T>G) pathogenic?

CHEK2 p.Arg523= (c.1569T>G) is classified Likely benign in CHEK2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-09-03). Very rare (popmax 0.0011%, sas); Associated with hereditary neoplastic syndrome.

What condition is associated with CHEK2 p.Arg523= (c.1569T>G)?

CHEK2 p.Arg523= (c.1569T>G) is associated with hereditary neoplastic syndrome (ClinVar).

How common is CHEK2 p.Arg523= (c.1569T>G) in the general population?

CHEK2 p.Arg523= (c.1569T>G) is very rare (popmax 0.0011%, sas) (gnomAD).

CHEK2 p.Arg523=

c.1569T>G · rs748954413 · VCV1692942

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.005	strongly benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -6.8	GERP -3.4
Overall
CADD	0.243	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/90,990 alleles

Overall 0.000125% 2/1,596,362 alleles · very rare exomes 2/1,444,032 · genomes 0/152,330 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0011%	90,990
European (non-Finnish)	8.48e-05%	1,179,710

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.Arg523=
Coding: c.1569T>G
MANE Select: NM_007194
dbSNP: rs748954413
Type: single nucleotide variant
Location: chr22:28687960 (GRCh38)
Gene constraint: LOEUF 1.399 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.64 · 38 PDB
Residue 523: the 'disordered' region

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

Similar variants

CHEK2 p.Arg523Gly Uncertain significance ★★ ⚠ same residue
CHEK2 p.Arg523Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
CHEK2 p.Arg523His Conflicting classifications of pathogenicity ★ ⚠ same residue
CHEK2 p.Arg523Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
CHEK2 p.Arg523Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
CHEK2 c.1008+1G>A Likely pathogenic ★★ same condition
CHEK2 c.1008+1G>T Likely pathogenic ★★ same condition
CHEK2 c.1008+2T>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-arg523 (accessed [today's date]).

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