Is BRCA2 p.Pro2798Arg (c.8393C>G) pathogenic?

BRCA2 p.Pro2798Arg (c.8393C>G) is classified Conflicting classifications of pathogenicity in BRCA2 (ClinVar, Conflicting submitters, 6 submitters; last evaluated 2026-01-18). AlphaMissense: ambiguous (0.4289); Absent from gnomAD v4.1; Associated with hereditary breast ovarian cancer syndrome.

What condition is associated with BRCA2 p.Pro2798Arg (c.8393C>G)?

BRCA2 p.Pro2798Arg (c.8393C>G) is associated with hereditary breast ovarian cancer syndrome, breast-ovarian cancer, familial, susceptibility to, 2, hereditary neoplastic syndrome (ClinVar).

How common is BRCA2 p.Pro2798Arg (c.8393C>G) in the general population?

BRCA2 p.Pro2798Arg (c.8393C>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.

What do computational predictors say about BRCA2 p.Pro2798Arg (c.8393C>G)?

AlphaMissense predicts ambiguous (score 0.4289) — an in-silico prediction, not a clinical call.

BRCA2 p.Pro2798Arg

c.8393C>G · rs276174906 · VCV234511

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 6 submitters

AlphaMissense

ambiguous

0.4289 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

hereditary breast ovarian cancer syndrome

Computational evidence

Protein change
AlphaMissense	0.4289	ambiguous · top 10% in BRCA2
REVEL	0.591	indeterminate
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 2, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 35 kb · p 0.00024 · regional, not allelic
Overall
CADD	25.6	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

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.Pro2798Arg
Coding: c.8393C>G
MANE Select: NM_000059
dbSNP: rs276174906
Type: single nucleotide variant
Location: chr13:32370463 (GRCh38)
Gene constraint: LOEUF 0.803 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Residue 2798: 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: breast-ovarian cancer, familial, susceptibility to, 2 hereditary neoplastic syndrome hereditary breast carcinoma

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

Inheritance: Autosomal dominant
Onset: Adult, Elderly

Similar variants

BRCA2 p.Pro2798Ala Uncertain significance ★★ same residue
BRCA2 p.Pro2798His Uncertain significance ★ same residue
BRCA2 p.Pro2798Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
BRCA2 p.Pro2798Ser Conflicting classifications of pathogenicity ★ same residue
BRCA2 p.Pro2798Thr Conflicting classifications of pathogenicity ★ same residue
BRCA2 p.Pro2798= Likely benign ★ same residue
BRCA2 p.Pro2798_Arg2799insTer Pathogenic ★★★ same residue
BRCA2 p.Pro2798fs Pathogenic ★ same residue

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-pro2798arg (accessed [today's date]).

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