Is BARD1 p.Arg751Trp (c.2251C>T) pathogenic?

BARD1 p.Arg751Trp (c.2251C>T) is classified Uncertain significance in BARD1 (ClinVar, Multiple submitters, 9 submitters; last evaluated 2026-02-03). AlphaMissense: ambiguous (0.3868); Very rare (popmax 0.00401%, afr); Associated with hereditary neoplastic syndrome.

What condition is associated with BARD1 p.Arg751Trp (c.2251C>T)?

BARD1 p.Arg751Trp (c.2251C>T) is associated with hereditary neoplastic syndrome, hereditary breast ovarian cancer syndrome, hereditary breast carcinoma (ClinVar).

How common is BARD1 p.Arg751Trp (c.2251C>T) in the general population?

BARD1 p.Arg751Trp (c.2251C>T) is very rare (popmax 0.00401%, afr) (gnomAD).

What do computational predictors say about BARD1 p.Arg751Trp (c.2251C>T)?

AlphaMissense predicts ambiguous (score 0.3868) — an in-silico prediction, not a clinical call.

BARD1 p.Arg751Trp

c.2251C>T · rs139785364 · VCV418642

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 9 submitters

AlphaMissense

ambiguous

0.3868 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00401%, afr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.3868	ambiguous
REVEL	0.357	indeterminate
SaProt	LLR -13.69	damaging
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.8	GERP 0.45, phastCons 1
Regional constraint	o/e 1.06	unconstrained · MANE · 81 kb · p 0.077 · regional, not allelic
Overall
CADD	27.7	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 0.00401% African / African-American · 3/74,888 alleles

Filtering AF 0.00106% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000495%

Overall 0.000867% 14/1,613,986 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00401%	24,963
South Asian	0.00329%	30,361
Admixed American	0.00167%	59,992
European (non-Finnish)	0.000593%	168,574

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: BARD1
Protein: p.Arg751Trp
Coding: c.2251C>T
MANE Select: NM_000465
dbSNP: rs139785364
Type: single nucleotide variant
Location: chr2:214728759 (GRCh38)
Gene constraint: LOEUF 1.087 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.82 · 11 PDB
Residue 751: the brct 2 domain; a β-strand

Full BARD1 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 ovarian cancer syndrome hereditary breast carcinoma

Similar variants

BARD1 p.Arg751Gln Uncertain significance ★★ ⚠ same residue
BARD1 p.Arg751Pro Uncertain significance ★★ ⚠ same residue
BARD1 p.Arg751= Likely benign ★ same residue
BARD1 c.1314+1G>A Pathogenic/Likely pathogenic ★★ same condition
BARD1 c.1314+1G>T Likely pathogenic ★★ same condition
BARD1 c.1396-1G>A Likely pathogenic ★★ same condition
BARD1 c.1396-1G>C Likely pathogenic ★★ same condition
BARD1 c.1396-1G>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/bard1-p-arg751trp (accessed [today's date]).

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