13-32339554-C-T

Variant names:

• chr13-32339554-C-T
• rs28897734
• NM_000059.4:c.5199C>T

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_000059.4(BRCA2):​c.5199C>T​(p.Ser1733Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.005 in 1,607,272 control chromosomes in the GnomAD database, including 50 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★). Synonymous variant affecting the same amino acid position (i.e. S1733S) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0047 (8 hom., cov: 33)
  • Exomes 𝑓: 0.0050 (42 hom.)
• Consequence: BRCA2 NM_000059.4 synonymous
• Clinical Significance: Benign reviewed by expert panel B:36
• Conservation: PhyloP100: -0.989
• Publications: 28 publications found

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

ACMG classification

Our verdict: Benign. The variant received -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 13-32339554-C-T is Benign according to our data. Variant chr13-32339554-C-T is described in ClinVar as Benign. ClinVar VariationId is 51813.Status of the report is reviewed_by_expert_panel, 3 stars.
• BP7: Synonymous conserved (PhyloP=-0.989 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00467 (711/152094) while in subpopulation NFE AF = 0.00693 (471/67970). AF 95% confidence interval is 0.00641. There are 8 homozygotes in GnomAd4. There are 339 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 8 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA2	NM_000059.4	c.5199C>T	p.Ser1733Ser	synonymous_variant	Exon 11 of 27	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8	c.5199C>T	p.Ser1733Ser	synonymous_variant	Exon 11 of 27	5	NM_000059.4	ENSP00000369497.3
BRCA2	ENST00000530893.7	c.4830C>T	p.Ser1610Ser	synonymous_variant	Exon 11 of 27	1		ENSP00000499438.2
BRCA2	ENST00000614259.2	n.5199C>T		non_coding_transcript_exon_variant	Exon 10 of 26	2		ENSP00000506251.1

Frequencies

GnomAD3 genomes AF: 0.00468 AC: 711 AN: 151976 Hom.: 8 Cov.: 33

Gnomad AFR AF: 0.000918

Gnomad AMI AF: 0.00329

Gnomad AMR AF: 0.00374

Gnomad ASJ AF: 0.00720

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000830

Gnomad FIN AF: 0.0101

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00693

Gnomad OTH AF: 0.00287

GnomAD2 exomes AF: 0.00451 AC: 1111 AN: 246572 AF XY: 0.00435

Gnomad AFR exome AF: 0.00101

Gnomad AMR exome AF: 0.00308

Gnomad ASJ exome AF: 0.00629

Gnomad EAS exome AF: 0.000548

Gnomad FIN exome AF: 0.0104

Gnomad NFE exome AF: 0.00581

Gnomad OTH exome AF: 0.00568

GnomAD4 exome AF: 0.00503 AC: 7323 AN: 1455178 Hom.: 42 Cov.: 45 AF XY: 0.00507 AC XY: 3668 AN XY: 723876

African (AFR) AF: 0.000543 AC: 18 AN: 33160

American (AMR) AF: 0.00291 AC: 128 AN: 43988

Ashkenazi Jewish (ASJ) AF: 0.00698 AC: 181 AN: 25926

East Asian (EAS) AF: 0.000632 AC: 25 AN: 39580

South Asian (SAS) AF: 0.000565 AC: 48 AN: 84954

European-Finnish (FIN) AF: 0.0110 AC: 586 AN: 53290

Middle Eastern (MID) AF: 0.000874 AC: 5 AN: 5722

European-Non Finnish (NFE) AF: 0.00550 AC: 6100 AN: 1108462

Other (OTH) AF: 0.00386 AC: 232 AN: 60096

GnomAD4 genome AF: 0.00467 AC: 711 AN: 152094 Hom.: 8 Cov.: 33 AF XY: 0.00456 AC XY: 339 AN XY: 74346

African (AFR) AF: 0.000916 AC: 38 AN: 41506

American (AMR) AF: 0.00374 AC: 57 AN: 15254

Ashkenazi Jewish (ASJ) AF: 0.00720 AC: 25 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.000831 AC: 4 AN: 4816

European-Finnish (FIN) AF: 0.0101 AC: 107 AN: 10578

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00693 AC: 471 AN: 67970

Other (OTH) AF: 0.00284 AC: 6 AN: 2110

Alfa AF: 0.00546 Hom.: 4

Bravo AF: 0.00369

Asia WGS AF: 0.000578 AC: 2 AN: 3474

ClinVar

Significance: Benign

Submissions summary: Benign:36

Revision: reviewed by expert panel

Submissions by phenotype

not specified Benign:11

Jan 11, 2016

Eurofins Ntd Llc (ga)

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 18, 2017

Cancer Genetics and Genomics Laboratory, British Columbia Cancer Agency

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

The BRCA2 p.Ser1733Ser variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site; in addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. The variant was identified in 76 of 12892 proband chromosomes (frequency: 0.006) from individuals or families with breast or ovarian cancer, or pancreatic carcinoma/melanoma-prone families (Balabas 2010, Bartsch 2009, Borg 2010, Schroeder 2010, Slater 2010, Stegel 2011, van der Hout 2006, Wagner 1999, Weber 2006, Yang 2009). The variant was also present in 5 of 310 control chromosomes (frequency: 0.016) from healthy individuals (Cvok 2008, Stegel 2011). The variant was identified in dbSNP (ID: rs28897734) with a minor allele frequency of 0.0016 (1000 Genomes Project), NHLBI Exome Sequencing Project (Exome Variant Server), Exome Aggregation Consortium (ExAC) database, Clinvitae database, Fanconi Anemia Mutation Database (LOVD), COSMIC, the ClinVar database (classified as “benign” by six submitters and “likely benign” by two submitters), GeneInsight COGR database (submitted by three clinical laboratories, with classifications of benign, presumed benign, and unclassified), the BIC database (11X with no clinical importance), and the BRCA Share (UMD) database (95X with a neutral classification). In the BRCA Share database, 15 samples were listed with co-occurring pathogenic BRCA1 or BRCA2 variants, increasing the likelihood that the p.Ser1733Ser variant is not clinically significant. The variant was identified at polymorphic allelic frequencies in two HAPMAP populations listed in the variant’s dbSNP record: HAPMAP-TSI (Toscans in Italy) and HAPMAP-MEX (Mexican ancestry in Los Angeles). The variant is also found at a polymorphic frequency (72/6606 alleles, frequency 0.0109) in a population of European (Finnish) individuals identified in the Exome Aggregation Consortium (ExAC) database; one of these individuals was homozygous for the variant, and two individuals from a cohort of European (Non-Finnish) were also homozygotes, increasing the likelihood of this being a benign variant. In addition, Myriad classifies this variant as a polymorphism (personal communication). In summary, based on the above information, this variant meets our laboratory's criteria to be classified as benign. -

-

Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Apr 20, 2017

Department of Pathology and Molecular Medicine, Queen's University

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 02, 2017

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 09, 2013

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

May 23, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.Ser1733Ser in exon 11 of BRCA2: This variant is not expected to have clinical significance because it does not alter an amino acid residue, is not located wit hin the splice consensus sequence, and has been identified in 1.09% (72/6606) of Finnish chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broa dinstitute.org; dbSNP rs28897734). -

Breast-ovarian cancer, familial, susceptibility to, 2 Benign:9

Sep 21, 2015

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 12, 2000

Breast Cancer Information Core (BIC) (BRCA2)

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Mar 20, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Oct 10, 2014

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 03, 2014

Michigan Medical Genetics Laboratories, University of Michigan

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 14, 2011

Sharing Clinical Reports Project (SCRP)

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jun 29, 2017

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

Significance: Benign

Review Status: reviewed by expert panel

Collection Method: curation

Class 1 not pathogenic based on frequency >1% in an outbred sampleset. Frequency 0.0109 (Finnish), derived from ExAC (2014-12-17). -

Apr 04, 2014

Counsyl

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: literature only

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

not provided Benign:5

May 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

BRCA2: BP4, BP7, BS2 -

Nov 03, 2021

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 15, 2017

Mayo Clinic Laboratories, Mayo Clinic

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Nov 27, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome Benign:4

Sep 29, 2017

True Health Diagnostics

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Apr 06, 2015

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 30, 2020

Sema4, Sema4

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: curation

- -

May 28, 2014

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Hereditary breast ovarian cancer syndrome Benign:3

Jan 27, 2014

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 19, 2022

National Health Laboratory Service, Universitas Academic Hospital and University of the Free State

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Medulloblastoma;C0346153:Familial cancer of breast;C0376358:Prostate cancer;C1838457:Fanconi anemia complementation group D1;C2675520:Breast-ovarian cancer, familial, susceptibility to, 2;C2751641:Glioma susceptibility 3;C3150546:Pancreatic cancer, susceptibility to, 2;CN033288:Wilms tumor 1 Benign:1

May 17, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breast and/or ovarian cancer Benign:1

Nov 11, 2016

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Fanconi anemia complementation group D1 Benign:1

Mar 20, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Familial cancer of breast Benign:1

Feb 23, 2017

Baylor Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	1.4
DANN	Benign	0.20
PhyloP100		-0.99
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs28897734; hg19: chr13-32913691; COSMIC: COSV66455665;