Is BARD1 p.Cys53fs (c.157del) pathogenic?

BARD1 p.Cys53fs (c.157del) is classified Pathogenic/Likely pathogenic in BARD1 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2025-06-15). Absent from gnomAD; Associated with hereditary breast carcinoma.

What condition is associated with BARD1 p.Cys53fs (c.157del)?

BARD1 p.Cys53fs (c.157del) is associated with hereditary breast carcinoma, hereditary neoplastic syndrome (ClinVar).

How common is BARD1 p.Cys53fs (c.157del) in the general population?

BARD1 p.Cys53fs (c.157del) is absent from gnomAD (gnomAD).

How is Hereditary breast cancer inherited?

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

BARD1 p.Cys53fs

c.157del · rs1696452439 · VCV926715

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

hereditary breast carcinoma

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function in a haploinsufficient gene (ClinGen)
NMD	predicted	premature termination codon in exon 1 of 11
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 7.3	GERP 1.7, phastCons 1

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. 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: BARD1
Protein: p.Cys53fs
Coding: c.157del
MANE Select: NM_000465
dbSNP: rs1696452439
Type: Deletion
Location: chr2:214809413 (GRCh38)
Gene constraint: LOEUF 1.087 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.82 · 11 PDB
Residue 53: a turn; the 'interaction with brca1' region

Full BARD1 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

BARD1 p.Cys53Gly Uncertain significance ★★ ⚠ same residue
BARD1 p.Cys53= Conflicting classifications of pathogenicity ★ same residue
BARD1 p.Cys53Ser Uncertain significance ★ ⚠ same residue
BARD1 p.Cys53Trp Conflicting classifications of pathogenicity ★ ⚠ same residue
BARD1 p.Cys53Tyr Conflicting classifications of pathogenicity ★ ⚠ same residue
BARD1 c.1306_1314+7del Likely pathogenic ★★ same condition
BARD1 c.158+2_158+10del Likely pathogenic ★★ same condition
BARD1 c.1676_1677+23del 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-cys53fs (accessed [today's date]).

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