Is BRCA2 p.Ala1725Ter (c.5171_5172dup) pathogenic?

BRCA2 p.Ala1725Ter (c.51715172dup) is classified Pathogenic in BRCA2 (ClinVar, Expert panel, 4 submitters; last evaluated 2016-09-08). Absent from gnomAD; Associated with breast-ovarian cancer, familial, susceptibility to, 2.

What condition is associated with BRCA2 p.Ala1725Ter (c.5171_5172dup)?

BRCA2 p.Ala1725Ter (c.5171_5172dup) is associated with breast-ovarian cancer, familial, susceptibility to, 2, hereditary breast ovarian cancer syndrome, hereditary neoplastic syndrome (ClinVar).

How common is BRCA2 p.Ala1725Ter (c.5171_5172dup) in the general population?

BRCA2 p.Ala1725Ter (c.5171_5172dup) is absent from gnomAD (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.Ala1725Ter

c.5171_5172dup · rs587782075 · VCV141872

Pathogenic Expert panel

Classification

Pathogenic

ClinVar

Review

Expert panel ★★★☆

ClinVar · 4 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

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.
Consequence	nonsense (stop-gain)	predicted loss-of-function in a haploinsufficient gene (ClinGen)
NMD	predicted	premature termination codon in exon 11 of 27
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP -0.95	GERP -4.8

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

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: BRCA2
Protein: p.Ala1725Ter
Coding: c.5171_5172dup
MANE Select: NM_000059
dbSNP: rs587782075
Type: Microsatellite
Location: chr13:32339523 (GRCh38)
Gene constraint: LOEUF 0.803 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Residue 1725: the 'interaction with rad51' region; the 'interaction with polh' region

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

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

Inheritance: Autosomal dominant
Onset: Adult, Elderly

Similar variants

BRCA2 p.Ala1725Thr Conflicting classifications of pathogenicity ★ ⚠ same residue
BRCA2 p.Ala1725Val Conflicting classifications of pathogenicity ★ ⚠ same residue
BRCA2 p.Ala1725= Likely benign ★ same residue
BRCA2 p.Ala1439fs Pathogenic ★★★ same condition
BRCA2 p.Ala565fs Pathogenic ★★★ same condition
BRCA2 p.Arg155_Asp156insTer Pathogenic ★★★ same condition
BRCA2 p.Arg2108_Val2109insTer Pathogenic ★★★ same condition
BRCA2 p.Arg468_Asp469insTer 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-ala1725ter (accessed [today's date]).

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