Is BARD1 p.Phe677= (c.2031C>T) pathogenic?

BARD1 p.Phe677= (c.2031C>T) is classified Benign/Likely benign in BARD1 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2024-07-29). Very rare (popmax 0.00167%, amr); Associated with hereditary neoplastic syndrome.

What condition is associated with BARD1 p.Phe677= (c.2031C>T)?

BARD1 p.Phe677= (c.2031C>T) is associated with hereditary neoplastic syndrome, hereditary breast carcinoma (ClinVar).

How common is BARD1 p.Phe677= (c.2031C>T) in the general population?

BARD1 p.Phe677= (c.2031C>T) is very rare (popmax 0.00167%, amr) (gnomAD).

BARD1 p.Phe677=

c.2031C>T · rs573443019 · VCV923738

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00167%, amr)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.121	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.9	GERP 2.1, phastCons 1
Overall
CADD	11.54	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00167% Admixed American · 1/60,014 alleles

Overall 0.000124% 2/1,614,118 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00167%	60,014
European (non-Finnish)	8.47e-05%	1,180,006

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.Phe677=
Coding: c.2031C>T
MANE Select: NM_000465
dbSNP: rs573443019
Type: single nucleotide variant
Location: chr2:214728979 (GRCh38)
Gene constraint: LOEUF 1.087 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.82 · 11 PDB
Residue 677: 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 carcinoma

Similar variants

BARD1 p.Phe677Leu Uncertain significance ★★ ⚠ same residue
BARD1 p.Phe677Tyr Uncertain significance ★★ ⚠ same residue
BARD1 p.Phe677Cys Uncertain significance ★ ⚠ same residue
BARD1 p.Phe677_Tyr678delinsCysHis Uncertain significance ★ 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

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-phe677 (accessed [today's date]).

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