Is BRCA2 p.Arg155Ser (c.465A>T) pathogenic?

BRCA2 p.Arg155Ser (c.465A>T) is classified Uncertain significance in BRCA2 (ClinVar, Multiple submitters, 5 submitters; last evaluated 2023-10-04). AlphaMissense: likely pathogenic (0.6507); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with BRCA2 p.Arg155Ser (c.465A>T)?

BRCA2 p.Arg155Ser (c.465A>T) is associated with hereditary neoplastic syndrome, hereditary breast ovarian cancer syndrome (ClinVar).

How common is BRCA2 p.Arg155Ser (c.465A>T) in the general population?

BRCA2 p.Arg155Ser (c.465A>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BRCA2 p.Arg155Ser (c.465A>T)?

AlphaMissense predicts likely pathogenic (score 0.6507) — an in-silico prediction, not a clinical call.

BRCA2 p.Arg155Ser

c.465A>T · rs1228857437 · VCV928772

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

AlphaMissense

likely pathogenic

0.6507 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, REVEL

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.6507	likely pathogenic · top 6% in BRCA2
REVEL	0.169	moderately benign-leaning
⇒ AlphaMissense calls this damaging; REVEL does not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5	GERP -1.4, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 47 kb · p 0.059 · regional, not allelic
Overall
CADD	18.44	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.Arg155Ser
Coding: c.465A>T
MANE Select: NM_000059
dbSNP: rs1228857437
Type: single nucleotide variant
Location: chr13:32326140 (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

Similar variants

BRCA2 p.Arg155Ile Uncertain significance ★★ ⚠ same residue
BRCA2 p.Arg155= Likely benign ★★ same residue
BRCA2 p.Arg155Lys Conflicting classifications of pathogenicity ★ ⚠ same residue
BRCA2 p.Arg155Thr Conflicting classifications of pathogenicity ★ ⚠ same residue
BRCA2 p.Arg155_Asp156insTer Pathogenic ★★★ 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

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-arg155ser (accessed [today's date]).

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