Is BRCA2 p.Arg2787= (c.8361C>G) pathogenic?

BRCA2 p.Arg2787= (c.8361C>G) is classified Likely benign in BRCA2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-06-24). Absent from gnomAD v4.1; Associated with hereditary breast ovarian cancer syndrome.

What condition is associated with BRCA2 p.Arg2787= (c.8361C>G)?

BRCA2 p.Arg2787= (c.8361C>G) is associated with hereditary breast ovarian cancer syndrome, hereditary neoplastic syndrome (ClinVar).

How common is BRCA2 p.Arg2787= (c.8361C>G) in the general population?

BRCA2 p.Arg2787= (c.8361C>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 p.Arg2787=

c.8361C>G · rs2072819211 · VCV1560588

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary breast ovarian cancer syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.019	GERP -2.2, phastCons 0.85
Overall
CADD	5.649	PHRED · no single calibrated threshold — expert panels disagree

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
Protein: p.Arg2787=
Coding: c.8361C>G
MANE Select: NM_000059
dbSNP: rs2072819211
Type: single nucleotide variant
Location: chr13:32370431 (GRCh38)
Gene constraint: LOEUF 0.803 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Residue 2787: a UniProt-annotated variant site (in bc; uncertain significance; also found in ovarian cancer; uncertain significance; somatic mutation; small decrease of homology-directed repair activity); the 'interaction with sem1' region

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

Disease context

hereditary breast ovarian cancer syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary neoplastic syndrome

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

Inheritance: Autosomal dominant
Onset: Adult, Elderly

Similar variants

BRCA2 p.Arg2787Cys Conflicting classifications of pathogenicity ★ same residue
BRCA2 p.Arg2787His Conflicting classifications of pathogenicity ★ same residue
BRCA2 p.Arg2787Pro Uncertain significance ★ same residue
BRCA2 p.Arg2787Leu Likely benign ★ same residue
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

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-p-arg2787 (accessed [today's date]).

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