chr13-32371231-T-TC

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP6_Very_StrongBS1BS2

The NM_000059.4(BRCA2):c.8632+132dupC variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0017 in 918,952 control chromosomes in the GnomAD database, including 13 homozygotes. Variant has been reported in ClinVar as Benign (★★★).

Frequency

Genomes: 𝑓 0.0069 ( 10 hom., cov: 32)

Exomes 𝑓: 0.00066 ( 3 hom. )

Consequence

BRCA2
NM_000059.4 intron

Scores

Not classified

Clinical Significance

Benign reviewed by expert panel B:5

Conservation

PhyloP100: -0.596

Publications

1 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):

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: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
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

BRCA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP6

Variant 13-32371231-T-TC is Benign according to our data. Variant chr13-32371231-T-TC is described in ClinVar as Benign. ClinVar VariationId is 209815.Status of the report is reviewed_by_expert_panel, 3 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00691 (1052/152270) while in subpopulation AFR AF = 0.0242 (1006/41556). AF 95% confidence interval is 0.023. There are 10 homozygotes in GnomAd4. There are 488 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 10 AD,AR gene

Variant Effect in Transcripts

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

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
BRCA2	NM_000059.4	MANE Select	c.8632+132dupC	intron	N/A	NP_000050.3	A0A7P0T9D7
BRCA2	NM_001432077.1		c.8632+132dupC	intron	N/A	NP_001419006.1	A0A7P0T9D7
BRCA2	NM_001406720.1		c.8632+132dupC	intron	N/A	NP_001393649.1	A0A8V8TPZ2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
BRCA2	ENST00000380152.8	TSL:5 MANE Select	c.8632+131_8632+132insC	intron	N/A	ENSP00000369497.3	P51587
BRCA2	ENST00000544455.6	TSL:1	c.8632+131_8632+132insC	intron	N/A	ENSP00000439902.1	P51587
BRCA2	ENST00000530893.7	TSL:1	c.8263+131_8263+132insC	intron	N/A	ENSP00000499438.2	A0A590UJI7

Frequencies

GnomAD3 genomes

AF:

0.00690

AC:

1050

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00216

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00430

GnomAD4 exome

AF:

0.000661

AC:

507

AN:

766682

Hom.:

AF XY:

0.000528

AC XY:

208

AN XY:

393676

show subpopulations

African (AFR)

AF:

0.0226

AC:

402

AN:

17758

American (AMR)

AF:

0.00169

AC:

AN:

21362

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

17274

East Asian (EAS)

AF:

0.00

AC:

AN:

31728

South Asian (SAS)

AF:

0.00

AC:

AN:

55154

European-Finnish (FIN)

AF:

0.00

AC:

AN:

35576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2624

European-Non Finnish (NFE)

AF:

0.0000310

AC:

AN:

549008

Other (OTH)

AF:

0.00144

AC:

AN:

36198

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.521

Heterozygous variant carriers

112

140

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.00691

AC:

1052

AN:

152270

Hom.:

Cov.:

AF XY:

0.00655

AC XY:

488

AN XY:

74464

show subpopulations

African (AFR)

AF:

0.0242

AC:

1006

AN:

41556

American (AMR)

AF:

0.00216

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68030

Other (OTH)

AF:

0.00426

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

105

158

210

263

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000646

Hom.:

Bravo

AF:

0.00791

Asia WGS

AF:

0.00202

AC:

AN:

3470

ClinVar

ClinVar submissions

Significance:Benign

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (3)

Breast-ovarian cancer, familial, susceptibility to, 2 (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

-0.60

Mutation Taster

=100/0

polymorphism

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over