Is BRCA2 p.Arg2645fs (c.7933_7943delinsCTATTAGCA) pathogenic?

BRCA2 p.Arg2645fs (c.79337943delinsCTATTAGCA) is classified Likely pathogenic in BRCA2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2022-01-19). No gnomAD frequency available for this variant; Associated with hereditary breast carcinoma.

What condition is associated with BRCA2 p.Arg2645fs (c.7933_7943delinsCTATTAGCA)?

BRCA2 p.Arg2645fs (c.7933_7943delinsCTATTAGCA) is associated with hereditary breast carcinoma, hereditary breast ovarian cancer syndrome (ClinVar).

How common is BRCA2 p.Arg2645fs (c.7933_7943delinsCTATTAGCA) in the general population?

BRCA2 p.Arg2645fs (c.7933_7943delinsCTATTAGCA) is no gnomAD frequency available for this variant (gnomAD).

How is Hereditary breast cancer inherited?

Typically Autosomal dominant, Multigenic/multifactorial (Orphanet). A genetic counselor can assess individual risk for a family.

BRCA2 p.Arg2645fs

c.7933_7943delinsCTATTAGCA · rs2137577594 · VCV1339716

Likely pathogenic Multiple submitters

Classification

Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

hereditary breast carcinoma

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function in a haploinsufficient gene (ClinGen)
NMD	predicted	premature termination codon in exon 17 of 27
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 6.7	GERP 1.3, phastCons 1

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.Arg2645fs
Coding: c.7933_7943delinsCTATTAGCA
MANE Select: NM_000059
dbSNP: rs2137577594
Type: Indel
Location: chr13:32362650 (GRCh38)
Gene constraint: LOEUF 0.803 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Residue 2645: the 'interaction with sem1' region

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

Disease context

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

Also linked: hereditary breast ovarian cancer syndrome

For Hereditary breast cancer (Orphanet):

Inheritance: Autosomal dominant, Multigenic/multifactorial
Onset: Adult, Elderly

Similar variants

BRCA2 p.Arg2645Gly Conflicting classifications of pathogenicity ★ same residue
BRCA2 c.8954-1_8955delinsAA Pathogenic ★★★ same condition
BRCA2 p.Arg1160_Asp1161delinsTer Pathogenic ★★★ same condition
BRCA2 p.Arg2645Ter Pathogenic ★★★ same residue
BRCA2 p.Arg2799fs Pathogenic ★★★ same condition
BRCA2 p.Glu1608fs Pathogenic ★★★ same condition
BRCA2 p.Ile1705fs Pathogenic ★★★ same condition
BRCA2 p.Leu1578fs 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-arg2645fs (accessed [today's date]).

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