Is ATM p.Val866= (c.2598T>G) pathogenic?

ATM p.Val866= (c.2598T>G) is classified Conflicting classifications of pathogenicity in ATM (ClinVar, Conflicting submitters, 6 submitters; last evaluated 2025-12-23). Very rare (popmax 0.00133%, afr); Associated with hereditary neoplastic syndrome.

What condition is associated with ATM p.Val866= (c.2598T>G)?

ATM p.Val866= (c.2598T>G) is associated with hereditary neoplastic syndrome, ataxia telangiectasia, hereditary breast carcinoma (ClinVar).

How common is ATM p.Val866= (c.2598T>G) in the general population?

ATM p.Val866= (c.2598T>G) is very rare (popmax 0.00133%, afr) (gnomAD).

ATM p.Val866=

c.2598T>G · rs730881350 · VCV181933

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 6 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.25	GERP -4.8
Overall
CADD	2.751	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00133% African / African-American · 1/74,916 alleles

Overall 6.2e-05% 1/1,613,976 alleles · very rare exomes 0/1,461,836 · genomes 1/152,140 · joint denominator

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: ATM
Protein: p.Val866=
Coding: c.2598T>G
MANE Select: NM_000051
dbSNP: rs730881350
Type: single nucleotide variant
Location: chr11:108267302 (GRCh38)
Gene constraint: LOEUF 0.847 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Residue 866: a UniProt-annotated variant site (in at); a UniProt-annotated variant site (in at; uncertain significance)

Full ATM 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: ataxia telangiectasia hereditary breast carcinoma

Similar variants

ATM p.Val866Ala Uncertain significance ★ ⚠ same residue
ATM p.Val866Ile Uncertain significance ★ ⚠ same residue
ATM p.Val866Gly Likely benign ★ same residue
ATM c.1607+1G>T Pathogenic ★★★ same condition
ATM c.2251-4A>G Likely pathogenic ★★★ same condition
ATM c.2466+5G>C Likely pathogenic ★★★ same condition
ATM c.3078-1G>A Pathogenic ★★★ same condition
ATM c.332-1G>A 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/atm-p-val866 (accessed [today's date]).

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