13-32336936-CA-CAA

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_000059.4(BRCA2):c.2588dupA(p.Asn863LysfsTer18) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000503 in 1,590,738 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★★). Synonymous variant affecting the same amino acid position (i.e. N863N) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000049 ( 0 hom. )

Consequence

BRCA2
NM_000059.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic reviewed by expert panel P:18

Conservation

PhyloP100: 0.0490

Publications

18 publications found

Variant links:

Genes affected

BRCA2 (HGNC:1101): (BRCA2 DNA repair associated) Inherited mutations in BRCA1 and this gene, BRCA2, confer increased lifetime risk of developing breast or ovarian cancer. Both BRCA1 and BRCA2 are involved in maintenance of genome stability, specifically the homologous recombination pathway for double-strand DNA repair. The largest exon in both genes is exon 11, which harbors the most important and frequent mutations in breast cancer patients. The BRCA2 gene was found on chromosome 13q12.3 in human. The BRCA2 protein contains several copies of a 70 aa motif called the BRC motif, and these motifs mediate binding to the RAD51 recombinase which functions in DNA repair. BRCA2 is considered a tumor suppressor gene, as tumors with BRCA2 mutations generally exhibit loss of heterozygosity (LOH) of the wild-type allele. [provided by RefSeq, May 2020]

BRCA2 Gene-Disease associations (from GenCC):

breast-ovarian cancer, familial, susceptibility to, 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen
Fanconi anemia complementation group D1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen, G2P
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

BRCA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 13-32336936-C-CA is Pathogenic according to our data. Variant chr13-32336936-C-CA is described in ClinVar as Pathogenic. ClinVar VariationId is 37793.Status of the report is reviewed_by_expert_panel, 3 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA2	NM_000059.4 link	c.2588dupA	p.Asn863LysfsTer18	frameshift_variant	Exon 11 of 27	ENST00000380152.8	NP_000050.3	P51587

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
BRCA2	ENST00000380152.8 link	c.2588dupA	p.Asn863LysfsTer18	frameshift_variant	Exon 11 of 27	5	NM_000059.4	ENSP00000369497.3	P51587
BRCA2	ENST00000530893.7 link	c.2219dupA	p.Asn740LysfsTer18	frameshift_variant	Exon 11 of 27	1		ENSP00000499438.2	A0A590UJI7
BRCA2	ENST00000614259.2 link	n.2588dupA		non_coding_transcript_exon_variant	Exon 10 of 26	2		ENSP00000506251.1	A0A7P0TAP7

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151990

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000880

AC:

AN:

227148

AF XY:

0.0000163

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000117

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000935

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000487

AC:

AN:

1438748

Hom.:

Cov.:

AF XY:

0.00000560

AC XY:

AN XY:

714834

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31816

American (AMR)

AF:

0.00

AC:

AN:

37736

Ashkenazi Jewish (ASJ)

AF:

0.0000400

AC:

AN:

24988

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39554

South Asian (SAS)

AF:

0.00

AC:

AN:

80440

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53038

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5626

European-Non Finnish (NFE)

AF:

0.00000452

AC:

AN:

1106228

Other (OTH)

AF:

0.00

AC:

AN:

59322

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.418

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151990

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74238

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41378

American (AMR)

AF:

0.00

AC:

AN:

15260

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5196

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10584

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67958

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:18

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Breast-ovarian cancer, familial, susceptibility to, 2

Pathogenic:8

May 29, 2002

Breast Cancer Information Core (BIC) (BRCA2)

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Dec 10, 2023

All of Us Research Program, National Institutes of Health

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2588dup (p.Asn863Lysfs*18) variant in the BRCA2 gene is located on the exon 11 and is predicted to cause shift of reading frame that introduces a premature translation termination codon (p.Asn863Lysfs*18), resulting in an absent or disrupted protein product. The variant has been reported in multiple individuals with breast and/or ovarian cancer (PMID: 25863477, 20694749, 21324516, 12942367, 9792861). Loss-of-function variants of BRCA2 are known to be pathogenic (PMID: 8988179, 11897832, 29446198). The variant is reported in ClinVar as pathogenic (ID: 37793) and reviewed by the expert panel. The variant is rare in general population according to gnomAD (2/227148). Therefore, the c.2588dup (p.Asn863Lysfs*18) variant of BRCA2 has been classified as pathogenic. -

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

The p.Asn862LysfsX18 duplication variant has been previously reported in the literature in 2 of 2740 chromosomes from individuals with hereditary breast and or ovarian cancer (pancreatic cancer was also suspected in one family) (Gao 2000, Zhang 2011). The variant is also reported in the UMD (3x as causal) and BIC (11x as clinically important) databases. In addition, it was reported in 3/4403 chromosomes from the exome variant server database and in dbSNP (ID#:rs80359335) in individuals of African American ancestry, increasing the likelihood this variant may be present at low frequency in this population. The p.Asn862LysfsX18 variant is predicted to cause a frameshift, which alters the protein's amino acid sequence beginning at codon 862 and leads to a premature stop codon 18 amino acids downstream. This alteration is then predicted to result in a truncated or absent protein and loss of function. Loss of function variants are an established mechanism of hereditary breast and ovarian cancer for the BRCA2 gene. In summary, based on the above information, this variant is classified as pathogenic. -

Sep 08, 2016

Evidence-based Network for the Interpretation of Germline Mutant Alleles (ENIGMA)

Significance:Pathogenic

Review Status:reviewed by expert panel

Collection Method:curation

Variant allele predicted to encode a truncated non-functional protein. -

Aug 07, 2015

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 01, 2012

Sharing Clinical Reports Project (SCRP)

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Oct 02, 2015

Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA), c/o University of Cambridge

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 24, 2021

Molecular Oncology, Hospital Universitario Central de Asturias (HUCA)

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:case-control

- -

not provided

Pathogenic:3

Oct 10, 2023

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The BRCA2 c.2588dup (p.Asn863Lysfs*18) variant (also known as 2816insA) alters the translational reading frame of the BRCA2 mRNA and causes the premature termination of BRCA2 protein synthesis. In the published literature, this variant has been reported in individuals with breast and/or ovarian cancer (PMIDs: 29673794 (2018), 24728189 (2014), 21324516 (2011), 20694749 (2010), 11030417 (2000), 9792861 (1998)), and in an individual with Fanconi anemia (PMID: 15070707 (2004)). The frequency of this variant in the general population, 0.0000088 (2/227148 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is consistent with pathogenicity. Based on the available information, this variant is classified as pathogenic. -

Feb 24, 2023

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Observed in multiple individuals with a personal and/or family history of BRCA2-related cancers (Tonin et al., 1998; Kanaan et al., 2003; Cavallone et al., 2010; Song et al., 2014; Rebbeck et al., 2018) and in an individual with Fanconi anemia (Wagner et al., 2004); Not observed at significant frequency in large population cohorts (gnomAD); Truncating variants in this gene are considered pathogenic by a well-established clinical consortium and/or database; Also known as 2816dupA and 2816insA; This variant is associated with the following publications: (PMID: 25863477, 29922827, 28888541, 11030417, 21324516, 9792861, 15382066, 16905680, 25884701, 10422801, 24728189, 15645491, 17851763, 24301060, 15070707, 15131399, 12942367, 9667259, 20694749, 17148771, 15004464, 16847550, 25428789, 30130155, 29446198, 30702160, 31825140, 30787465, 33471991) -

Nov 03, 2021

Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary breast ovarian cancer syndrome

Pathogenic:3

Jan 31, 2014

Research Molecular Genetics Laboratory, Women's College Hospital, University of Toronto

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:research

- -

Oct 11, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Asn863Lysfs*18) in the BRCA2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BRCA2 are known to be pathogenic (PMID: 20104584). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This premature translational stop signal has been observed in individual(s) with breast cancer, ovarian cancer, and Fanconi anemia (PMID: 11030417, 15070707, 21324516, 24728189). This variant is also known as 2816insA. ClinVar contains an entry for this variant (Variation ID: 37793). For these reasons, this variant has been classified as Pathogenic. -

Feb 21, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: BRCA2 c.2588dupA (p.Asn863LysfsX18) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. The variant was absent in 222684 control chromosomes (gnomAD). c.2588dupA has been reported in the literature in multiple individuals affected with Hereditary Breast and Ovarian Cancer (Gao_2000, Frank_1998, Euhus_2002, Kanaan_2003, Risch_2006, Zheng_2018). These data indicate that the variant is very likely to be associated with disease. Eight ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cite the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Hereditary cancer-predisposing syndrome

Pathogenic:2

Jun 28, 2024

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2588dupA pathogenic mutation, located in coding exon 10 of the BRCA2 gene, results from a duplication of A at nucleotide position 2588, causing a translational frameshift with a predicted alternate stop codon (p.N863Kfs*18). This mutation has been identified in multiple individuals with personal and/or family histories of breast, ovarian, and pancreatic cancers (Gao Q et al. Hum. Genet. 2000 Aug;107:186-91; Zhang S et al. Gynecol. Oncol. 2011 May;121:353-7; Song H et al. Hum. Mol. Genet. 2014 Sep;23:4703-9; Park JS et al. Clin Breast Cancer, 2018 10;18:362-373.e1; Dorling et al. N Engl J Med. 2021 02;384:428-439). Reports of this alteration in individuals of French Canadian ancestry suggest a founder effect in this population (Tonin PN et al. Am. J. Hum. Genet. 1998 Nov;63:1341-51; Cavallone L et al. Fam. Cancer 2010 Dec;9:507-17). This mutation was identified in a 5-year old boy with Fanconi Anemia, with a second unidentified splicing alteration suspected based on cDNA analysis (Wagner JE et al. Blood 2004 Apr;103:3226-9). Of note, this alteration is also designated as 2816insA in published literature. In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Apr 29, 2024

Color Diagnostics, LLC DBA Color Health

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant inserts 1 nucleotide in exon 11 of the BRCA2 gene, creating a frameshift and premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in individuals affected with breast cancer (PMID: 16760289, 25428789, 30130155) and ovarian cancer (PMID: 21324516, 24728189). This variant has been identified in 2/227148 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Loss of BRCA2 function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -

Breast and/or ovarian cancer

Pathogenic:1

Dec 04, 2015

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Familial cancer of breast

Pathogenic:1

Mar 19, 2024

Baylor Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.049

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over