Is CHEK2 p.Pro283Thr (c.847C>A) pathogenic?

CHEK2 p.Pro283Thr (c.847C>A) is classified Uncertain significance in CHEK2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-11-13). AlphaMissense: likely pathogenic (0.6354); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with CHEK2 p.Pro283Thr (c.847C>A)?

CHEK2 p.Pro283Thr (c.847C>A) is associated with hereditary neoplastic syndrome, hereditary breast carcinoma (ClinVar).

How common is CHEK2 p.Pro283Thr (c.847C>A) in the general population?

CHEK2 p.Pro283Thr (c.847C>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CHEK2 p.Pro283Thr (c.847C>A)?

AlphaMissense predicts likely pathogenic (score 0.6354) — an in-silico prediction, not a clinical call.

CHEK2 p.Pro283Thr

c.847C>A · rs1555917036 · VCV1763526

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.6354 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,554,814)

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.6354	likely pathogenic
REVEL	0.397	indeterminate
SaProt	LLR -10.59	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.4, phastCons 1
Regional constraint	o/e 1.02	unconstrained · MANE · 47 kb · p 0.57 · regional, not allelic
Overall
CADD	28.6	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

No allele count reported in gnomAD v4.1 (AN 1,554,814). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: CHEK2
Protein: p.Pro283Thr
Coding: c.847C>A
MANE Select: NM_007194
dbSNP: rs1555917036
Type: single nucleotide variant
Location: chr22:28703566 (GRCh38)
Gene constraint: LOEUF 1.399 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 77.64 · 38 PDB
Residue 283: the protein kinase domain

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.Pro283His Uncertain significance ★★ ⚠ same residue
CHEK2 p.Pro283Ser Uncertain significance ★★ ⚠ same residue
CHEK2 p.Pro283= Benign/Likely benign ★★ same residue
CHEK2 p.Pro283Ala Uncertain significance ★ ⚠ same residue
CHEK2 p.Pro283Leu Uncertain significance ★ ⚠ 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-pro283thr (accessed [today's date]).

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