Is BARD1 p.Cys74= (c.222T>C) pathogenic?

BARD1 p.Cys74= (c.222T>C) is classified Benign/Likely benign in BARD1 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2024-07-19). Very rare (popmax 8.53e-05%, nfe); Associated with hereditary neoplastic syndrome.

What condition is associated with BARD1 p.Cys74= (c.222T>C)?

BARD1 p.Cys74= (c.222T>C) is associated with hereditary neoplastic syndrome, hereditary breast ovarian cancer syndrome, hereditary breast carcinoma (ClinVar).

How common is BARD1 p.Cys74= (c.222T>C) in the general population?

BARD1 p.Cys74= (c.222T>C) is very rare (popmax 8.53e-05%, nfe) (gnomAD).

BARD1 p.Cys74=

c.222T>C · rs1168791343 · VCV820908

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

gnomAD v4.1

Rare

very rare (popmax 8.53e-05%, nfe)

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 1.3	GERP 2, phastCons 1
Overall
CADD	9.716	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.53e-05% European (non-Finnish) · 1/1,172,912 alleles

Overall 6.94e-05% 1/1,441,678 alleles · very rare

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.Cys74=
Coding: c.222T>C
MANE Select: NM_000465
dbSNP: rs1168791343
Type: single nucleotide variant
Location: chr2:214792439 (GRCh38)
Gene constraint: LOEUF 1.087 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.82 · 11 PDB
Residue 74: an α-helix; the 'interaction with brca1' region

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.Cys74Phe Uncertain significance ★★ ⚠ same residue
BARD1 p.Cys74Ser Uncertain significance ★★ ⚠ same residue
BARD1 p.Cys74Tyr Uncertain significance ★★ ⚠ same residue
BARD1 p.Cys74Arg Uncertain significance ★ ⚠ same residue
BARD1 p.Cys74Gly Uncertain significance ★ ⚠ same residue
BARD1 p.Cys74Trp Uncertain significance ★ ⚠ same residue
BARD1 p.Cys74_Asp77delinsTer Pathogenic ★ same residue
BARD1 c.1314+1G>A Pathogenic/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-cys74 (accessed [today's date]).

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