Is BRCA2 c.8331+2675C>A pathogenic?

BRCA2 c.8331+2675C>A is classified Benign in BRCA2 (ClinVar, Expert panel, 1 submitter; last evaluated 2015-01-12). Common (popmax 57.3%, eas) — too common for a highly-penetrant pathogenic allele; Associated with breast-ovarian cancer, familial, susceptibility to, 2.

What condition is associated with BRCA2 c.8331+2675C>A?

BRCA2 c.8331+2675C>A is associated with breast-ovarian cancer, familial, susceptibility to, 2 (ClinVar).

How is Hereditary breast and/or ovarian cancer syndrome inherited?

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

BRCA2 c.8331+2675C>A

Q: How common is BRCA2 c.8331+2675C>A in the general population?

BRCA2 c.8331+2675C>A is common (popmax 57.3%, eas) — too common for a highly-penetrant pathogenic allele (gnomAD).

rs9534275 · VCV209944

Benign Expert panel

Classification

Benign

ClinVar

Review

Expert panel ★★★☆

ClinVar · 1 submitter

gnomAD v4.1

Common

common (popmax 57.3%, eas) — too common for a highly-penetrant pathogenic allele

Conditions

breast-ovarian cancer, familial, susceptibility to, 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
Splice region	donor +2675	deep intronic (+2675 nt into the intron)
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.49	GERP 0.14, phastCons 0.48
Overall
CADD	3.351	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 57.3% East Asian · 2,956/5,160 alleles

Filtering AF 55.6% ClinGen BA1/BS1 input FAF95, joint · FAF99 54.9%

Overall 52.1% 79,129/151,914 alleles · common

Ancestry group	Frequency	1 in
East Asiangrpmax	57.3%	2
Finnishnot grpmax-eligible	57.2%	2
Admixed American	53%	2
European (non-Finnish)	52%	2
African / African-American	51.2%	2
Remaining individualsnot grpmax-eligible	50.1%	2
South Asian	48%	2
Ashkenazi Jewishnot grpmax-eligible	47.4%	2
Amishnot grpmax-eligible	43.1%	2
Middle Eastern	41.8%	2

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: BRCA2
Coding: c.8331+2675C>A
MANE Select: NM_000059
dbSNP: rs9534275
Type: single nucleotide variant
Location: chr13:32366208 (GRCh38)
Gene constraint: LOEUF 0.803 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)

Full BRCA2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

breast-ovarian cancer, familial, susceptibility to, 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hereditary breast and/or ovarian cancer syndrome (Orphanet):

Inheritance: Autosomal dominant
Onset: Adult, Elderly

Similar variants

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BRCA2 c.316+5G>A Pathogenic ★★★ same condition
BRCA2 c.316+5G>C Pathogenic ★★★ same condition
BRCA2 c.475+1G>A Pathogenic ★★★ same condition
BRCA2 c.475+1G>T Pathogenic ★★★ same condition
BRCA2 c.476-2A>G Pathogenic ★★★ same condition
BRCA2 c.517-2A>G 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/brca2-c-8331-plus-2675c-a (accessed [today's date]).

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