Is CHEK2 p.Lys365= (c.1095G>A) pathogenic?

CHEK2 p.Lys365= (c.1095G>A) is classified Uncertain significance in CHEK2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-10-10). Absent from gnomAD v4.1; Associated with hereditary breast carcinoma.

What condition is associated with CHEK2 p.Lys365= (c.1095G>A)?

CHEK2 p.Lys365= (c.1095G>A) is associated with hereditary breast carcinoma, hereditary neoplastic syndrome (ClinVar).

How common is CHEK2 p.Lys365= (c.1095G>A) in the general population?

CHEK2 p.Lys365= (c.1095G>A) is absent from gnomAD v4.1 (gnomAD).

How is Hereditary breast cancer inherited?

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

CHEK2 p.Lys365=

c.1095G>A · rs1601726502 · VCV645550

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary breast carcinoma

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.134	moderately benign-leaning
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.36 · evaluated, not missing
Pangolin	Δ0.60	loss · gain 0.01 · SpliceAI below 0.2 · independent
Constraint at this position
Conservation	phyloP 5.9	GERP 1.7, phastCons 1
Overall
CADD	21.3	PHRED · no single calibrated threshold — expert panels disagree

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: CHEK2
Protein: p.Lys365=
Coding: c.1095G>A
MANE Select: NM_007194
dbSNP: rs1601726502
Type: single nucleotide variant
Location: chr22:28696901 (GRCh38)
Gene constraint: LOEUF 1.399 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.64 · 38 PDB
Residue 365: a β-strand; the protein kinase domain

Full CHEK2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

Also linked: hereditary neoplastic syndrome

For Hereditary breast cancer (Orphanet):

Inheritance: Autosomal dominant, Multigenic/multifactorial
Onset: Adult, Elderly

Similar variants

CHEK2 p.Lys365Arg Uncertain significance ★★ same residue
CHEK2 p.Lys365Glu Uncertain significance ★★ ⚠ same residue
CHEK2 p.Lys365Met Uncertain significance ★★ ⚠ same residue
CHEK2 p.Lys365Asn Conflicting classifications of pathogenicity ★ ⚠ same residue
CHEK2 p.Lys365fs Pathogenic ★ same residue
CHEK2 p.Lys365Thr Uncertain significance ★ same residue
CHEK2 c.1008+1G>A Likely pathogenic ★★ same condition
CHEK2 c.1008+1G>T 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-lys365 (accessed [today's date]).

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