rs1799954

Variant names:

• chr13-32340455-C-A
• rs1799954
• NM_000059.4:c.6100C>A
• BRCA2 p.Arg2034Ser

Your query was ambiguous. Multiple possible variants found:

• chr13-32340455-C-A
• chr13-32340455-C-G
• chr13-32340455-C-T

GermlineCancer (beta)

Variant summary

Our verdict is Uncertain significance.

+2 Uncertain · Warm

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received 2 classification points (ACGS-UK Somatic Oncogenicity v2025). O3_Moderate

The NM_000059.4(BRCA2):c.6100C>A (p.Arg2034Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The gene BRCA2 is a tumor suppressor gene (CancerMine: 139 TSG, 7 oncogene, 19 driver citations). The gene BRCA2 is a cancer driver gene (CancerMine: 139 TSG, 7 oncogene, 19 driver citations). The variant allele was found at a cumulative frequency of 0.00000124 (AC=2) in the gnomAD database across 1,613,582 control chromosomes (no homozygotes observed). The grpmax filtering allele frequency (95% CI) is 0.0000241. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign/Likely Benign (no review stars). Other variants at the same amino acid position have been reported in ClinVar (not pathogenic): p.R2034C: Benign (ClinVar VariationId 41558, 3 stars); p.R2034G: Uncertain_significance (ClinVar VariationId 2719621, 1 star); p.R2034H: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 52012); p.R2034L: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 1041798); p.R2034P: Conflicting_classifications_of_pathogenicity (ClinVar VariationId 840304)

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: BRCA2 NM_000059.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:2
• Conservation: PhyloP100: -0.243
• Publications: 73 publications found

Genes affected

BRCA2 (HGNC:1101): (BRCA2 DNA repair associated) The product of this gene in involved in maintenance of genome stability. It is involved in double-strand break repair pathways during mitotic and meiotic homologous recombination and functions in protecting DNA replication forks. The encoded protein contains sites for interactions with PALB2 and EMSY and an N-terminal DNA binding domain. It also contains a RAD51 binding domain with multiple components. It has multiple BRC repeats, an alpha helix domain, oligonucleotide binding folds, and a tower-like domain. It has a nuclear localization signal and a phosphorylation site for cyclin-dependent kinase. The C-terminus of the protein can bind single-stranded and double-stranded DNA. The product of this gene interacts with multiple proteins, including RAD51. It is involved in recruiting RAD51 filaments to DNA double-strand break sites and also in cytoplasmic division. It also acts as a tumor suppressor. Mutations in this gene or decreased expression have been implicated in multiple tumor types, including breast, ovarian, pancreatic, prostate and other cancers. [provided by RefSeq, May 2026]

BRCA2 Gene-Disease associations (from GenCC):

• BRCA2-related cancer predisposition

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• breast-ovarian cancer, familial, susceptibility to, 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
• Fanconi anemia complementation group D1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, Ambry Genetics
• pancreatic cancer, susceptibility to, 2

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• sarcoma

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• hereditary breast ovarian cancer syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• medulloblastoma

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

Classification according to ACGS-UK Somatic Oncogenicity v2025

Specifications for BRCA2 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Classification was made for transcript:

Our verdict: Uncertain_significance. The variant received 2 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	O3Absent or very rare in population		Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = 0.000024, AC = 2 — absent/extremely rare (O3 moderate [+2])

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_000059.4. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	BRCA2 NM_000059.4	MANE Select	c.6100C>A p.Arg2034Ser	missense	Exon 11 of 27	Prot: NP_000050.3 UniProt:
	BRCA2 NM_001432077.1		c.6100C>A p.Arg2034Ser	missense	Exon 11 of 27	Prot: NP_001419006.1 UniProt:
	BRCA2 NM_001406720.1		c.6100C>A p.Arg2034Ser	missense	Exon 11 of 27	Prot: NP_001393649.1 UniProt:

BRCA2 NM_000059.4

MANE Select

HGVSc / HGVSpc.6100C>Ap.Arg2034Ser

Exon rankExon 11 of 27

missense

Prot: NP_000050.3UniProt: A0A7P0T9D7P51587

BRCA2 NM_001432077.1

HGVSc / HGVSpc.6100C>Ap.Arg2034Ser

Exon rankExon 11 of 27

missense

Prot: NP_001419006.1UniProt: A0A7P0T9D7P51587

BRCA2 NM_001406720.1

HGVSc / HGVSpc.6100C>Ap.Arg2034Ser

Exon rankExon 11 of 27

missense

Prot: NP_001393649.1UniProt: A0A8V8TPZ2

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	BRCA2 ENST00000380152.8	TSL:5MANE Select	c.6100C>A p.Arg2034Ser	missense	Exon 11 of 27	Prot: ENSP00000369497.3 UniProt:
	BRCA2 ENST00000544455.6	TSL:1	c.6100C>A p.Arg2034Ser	missense	Exon 11 of 27	Prot: ENSP00000439902.1 UniProt:
	BRCA2 ENST00000530893.7	TSL:1	c.5731C>A p.Arg1911Ser	missense	Exon 11 of 27	Prot: ENSP00000499438.2 UniProt:

BRCA2 ENST00000380152.8

TSL:5MANE Select

HGVSc / HGVSpc.6100C>Ap.Arg2034Ser

Exon rankExon 11 of 27

missense

Prot: ENSP00000369497.3UniProt: P51587

BRCA2 ENST00000544455.6

TSL:1

HGVSc / HGVSpc.6100C>Ap.Arg2034Ser

Exon rankExon 11 of 27

missense

Prot: ENSP00000439902.1UniProt: P51587

BRCA2 ENST00000530893.7

TSL:1

HGVSc / HGVSpc.5731C>Ap.Arg1911Ser

Exon rankExon 11 of 27

missense

Prot: ENSP00000499438.2UniProt: A0A590UJI7

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 4 sources Large-scale international reference populations
GnomAD3 genomes	AF: 0.00000657	AC:1	Hom:0	AN:152148	Cov:33
GnomAD4 exome	AF: 6.84e-7	AC:1	Hom:0	AN:1461434	Cov:46
GnomAD4 genome	AF: 0.00000657	AC:1	Hom:0	AN:152148	Cov:33
ALFA (dbGaP/dbSNP Allele Frequency Aggregator)	AF: 0.00000141	AC:1	Hom:13	AN:708636	Cov:

Showing 4 sources

Case/control cohorts

Cohort	Cases			Controls
	AF	AC	AN	AF	AC	AN
SCHEMA(Schizophrenia)	0.0000129	1	77596	0.00	0	139182

Showing 1 cohortAllele count / allele number. AF is computed from the counts for ASC (not provided by the source).

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Hereditary cancer-predisposing syndrome (2)
-	-	1	Breast-ovarian cancer, familial, susceptibility to, 2 (1)
-	1	-	Hereditary breast ovarian cancer syndrome (1)
-	1	-	not specified (1)

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Uncertain	10
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	9.5
DANN	Benign	0.92
Eigen	Benign	-1.0
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.12	N
FuncVEP CTI	Benign	0.00068
GPN-Star LLR	N/A	-0.35
GPN-Star score	N/A	0.35
M_CAP	Uncertain	0.10	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.93	T
Mutation Taster	N/A	95/5	polymorphism
PhyloP100	Benign	-0.24
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-1.0	N
REVEL	Uncertain	0.32
Sift	Uncertain	0.024	D
Sift4G	Benign	0.47	T
VESM-3B	Benign	-1.1

Showing 23 of 23 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.0
SpliceAI score (max)	Benign	0.0	Details are displayed if max score is > 0.2

Showing 2 of 2 scores

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs1799954;

hg19: chr13-32914592;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar