Is BRCA2 p.Pro3229Ser (c.9685C>T) pathogenic?

BRCA2 p.Pro3229Ser (c.9685C>T) is classified Uncertain significance in BRCA2 (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-10-23). AlphaMissense: likely benign (0.0885); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with BRCA2 p.Pro3229Ser (c.9685C>T)?

BRCA2 p.Pro3229Ser (c.9685C>T) is associated with hereditary neoplastic syndrome, hereditary breast ovarian cancer syndrome, hereditary breast carcinoma (ClinVar).

How common is BRCA2 p.Pro3229Ser (c.9685C>T) in the general population?

BRCA2 p.Pro3229Ser (c.9685C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BRCA2 p.Pro3229Ser (c.9685C>T)?

AlphaMissense predicts likely benign (score 0.0885) — an in-silico prediction, not a clinical call.

BRCA2 p.Pro3229Ser

c.9685C>T · rs1064793542 · VCV418945

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.0885 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, REVEL · SaProt no call

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.0885	likely benign
REVEL	0.124	moderately benign-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this tolerated; SaProt makes no call.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.96	GERP 0.023, phastCons 0.47
Regional constraint	o/e 0.87	unconstrained · MANE · 35 kb · p 0.00024 · regional, not allelic
Overall
CADD	12.41	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

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.Pro3229Ser
Coding: c.9685C>T
MANE Select: NM_000059
dbSNP: rs1064793542
Type: single nucleotide variant
Location: chr13:32398198 (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

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

Also linked: hereditary breast ovarian cancer syndrome hereditary breast carcinoma

Similar variants

BRCA2 p.Pro3229= Likely benign ★★ same residue
BRCA2 p.Pro3229Ala Uncertain significance ★ ⚠ same residue
BRCA2 p.Pro3229Arg Uncertain significance ★ ⚠ same residue
BRCA2 p.Pro3229His Uncertain significance ★ ⚠ same residue
BRCA2 p.Pro3229Leu Uncertain significance ★ ⚠ same residue
BRCA2 p.Pro3229Thr Uncertain significance ★ ⚠ same residue
BRCA2 c.316+1G>T Pathogenic ★★★ same condition
BRCA2 c.316+2T>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-pro3229ser (accessed [today's date]).

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