Is BRCA2 c.8331+2T>G pathogenic?

BRCA2 c.8331+2T>G is classified Pathogenic/Likely pathogenic in BRCA2 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2025-07-31). Absent from gnomAD v4.1; Associated with breast-ovarian cancer, familial, susceptibility to, 2.

What condition is associated with BRCA2 c.8331+2T>G?

BRCA2 c.8331+2T>G is associated with breast-ovarian cancer, familial, susceptibility to, 2, hereditary breast ovarian cancer syndrome, hereditary neoplastic syndrome (ClinVar).

How common is BRCA2 c.8331+2T>G in the general population?

BRCA2 c.8331+2T>G is absent from gnomAD v4.1 (gnomAD).

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+2T>G

rs398122602 · VCV230571

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

Consequence

canonical splice-site (±1/±2)

predicted LoF

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

breast-ovarian cancer, familial, susceptibility to, 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Consequence	canonical splice-site (±1/±2)	predicted loss-of-function in a haploinsufficient gene (ClinGen)
Splicing
Splice region	donor +2	canonical splice dinucleotide (donor +2) · inside the BP7-excluded zone
SpliceAI	Δ0.93	donor loss, 2 bp away · raw score · deltas
Pangolin	Δ0.84	loss · gain 0.06 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 7.7	GERP 2.3, phastCons 1
Non-coding constraint	Z 0.81	1 kb window · o/e 0.94 · regional · uncalibrated
Overall
CADD	32.0	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: BRCA2
Coding: c.8331+2T>G
MANE Select: NM_000059
dbSNP: rs398122602
Type: single nucleotide variant
Location: chr13:32363535 (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

Also linked: hereditary breast ovarian cancer syndrome hereditary neoplastic syndrome hereditary breast carcinoma

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

Inheritance: Autosomal dominant
Onset: Adult, Elderly

Similar variants

BRCA2 c.316+1G>T Pathogenic ★★★ same condition
BRCA2 c.316+2T>C Pathogenic ★★★ same condition
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-2t-g (accessed [today's date]).

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