13-32336584-T-C

Position:

• chr13-32336584-T-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BA1

The NM_000059.4(BRCA2):​c.2229T>C​(p.His743=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0421 in 1,613,968 control chromosomes in the GnomAD database, including 2,195 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

• Frequency:
  • Genomes: 𝑓 0.041 (217 hom., cov: 32)
  • Exomes 𝑓: 0.042 (1978 hom.)
• Consequence: BRCA2 NM_000059.4 synonymous
• Clinical Significance: Benign reviewed by expert panel B:31 O:1
• Conservation: PhyloP100: 0.317

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]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BP6: Variant 13-32336584-T-C is Benign according to our data. Variant chr13-32336584-T-C is described in ClinVar as [Benign]. Clinvar id is 125979.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr13-32336584-T-C is described in Lovd as [Likely_benign]. Variant chr13-32336584-T-C is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=0.317 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.106 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BRCA2	NM_000059.4	c.2229T>C	p.His743=	synonymous_variant	11/27	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8	c.2229T>C	p.His743=	synonymous_variant	11/27	5	NM_000059.4	ENSP00000369497	A2

Frequencies

GnomAD3 genomes AF: 0.0409 AC: 6217 AN: 152104 Hom.: 214 Cov.: 32

Gnomad AFR AF: 0.0213

Gnomad AMI AF: 0.0263

Gnomad AMR AF: 0.0971

Gnomad ASJ AF: 0.0441

Gnomad EAS AF: 0.100

Gnomad SAS AF: 0.114

Gnomad FIN AF: 0.0146

Gnomad MID AF: 0.0380

Gnomad NFE AF: 0.0344

Gnomad OTH AF: 0.0464

GnomAD3 exomes AF: 0.0527 AC: 13245 AN: 251258 Hom.: 549 AF XY: 0.0558 AC XY: 7572 AN XY: 135806

Gnomad AFR exome AF: 0.0225

Gnomad AMR exome AF: 0.0722

Gnomad ASJ exome AF: 0.0383

Gnomad EAS exome AF: 0.102

Gnomad SAS exome AF: 0.114

Gnomad FIN exome AF: 0.0156

Gnomad NFE exome AF: 0.0351

Gnomad OTH exome AF: 0.0487

GnomAD4 exome AF: 0.0422 AC: 61656 AN: 1461746 Hom.: 1978 Cov.: 33 AF XY: 0.0448 AC XY: 32594 AN XY: 727166

Gnomad4 AFR exome AF: 0.0204

Gnomad4 AMR exome AF: 0.0751

Gnomad4 ASJ exome AF: 0.0413

Gnomad4 EAS exome AF: 0.119

Gnomad4 SAS exome AF: 0.115

Gnomad4 FIN exome AF: 0.0152

Gnomad4 NFE exome AF: 0.0342

Gnomad4 OTH exome AF: 0.0456

GnomAD4 genome AF: 0.0410 AC: 6236 AN: 152222 Hom.: 217 Cov.: 32 AF XY: 0.0436 AC XY: 3247 AN XY: 74444

Gnomad4 AFR AF: 0.0214

Gnomad4 AMR AF: 0.0978

Gnomad4 ASJ AF: 0.0441

Gnomad4 EAS AF: 0.0998

Gnomad4 SAS AF: 0.114

Gnomad4 FIN AF: 0.0146

Gnomad4 NFE AF: 0.0344

Gnomad4 OTH AF: 0.0482

Alfa AF: 0.0357 Hom.: 159

Bravo AF: 0.0423

Asia WGS AF: 0.110 AC: 381 AN: 3478

EpiCase AF: 0.0364

EpiControl AF: 0.0391

ClinVar

Significance: Benign

Submissions summary: Benign:31 Other:1

Revision: reviewed by expert panel

Submissions by phenotype

Breast-ovarian cancer, familial, susceptibility to, 2 Benign:10 Other:1

not provided, no classification provided	clinical testing	Breast Cancer Information Core (BIC) (BRCA2)	-	- -
Benign, reviewed by expert panel	curation	Evidence-based Network for the Interpretation of Germline Mutant Alleles (ENIGMA)	Jan 12, 2015	Class 1 not pathogenic based on frequency >1% in an outbred sampleset. Frequency 0.1031 (Asian), 0.01423 (African), 0.03694 (European), derived from 1000 genomes (2012-04-30). -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Michigan Medical Genetics Laboratories, University of Michigan	Nov 03, 2014	- -
Benign, criteria provided, single submitter	clinical testing	GreenArray Genomic Research & Solutions of Accurate Diagnostic Private Limited	-	- -
Benign, no assertion criteria provided	clinical testing	Sharing Clinical Reports Project (SCRP)	Mar 15, 2011	- -
Benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -
Benign, criteria provided, single submitter	literature only	Counsyl	Jan 02, 2014	High frequency in a 1kG or ESP population: 3.7 %. -
Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Oct 10, 2014	- -
Benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

not specified Benign:9

Benign, criteria provided, single submitter	clinical testing	Cancer Genetics and Genomics Laboratory, British Columbia Cancer Agency	Apr 18, 2017	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 27, 2013	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. -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	#N/A -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 30, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute	-	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneKor MSA	Nov 01, 2017	- -

Hereditary breast ovarian cancer syndrome Benign:4

Benign, criteria provided, single submitter	clinical testing	National Health Laboratory Service, Universitas Academic Hospital and University of the Free State	Apr 19, 2022	- -
Benign, criteria provided, single submitter	research	Genetics Program, Instituto Nacional de Cancer	Nov 01, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jan 13, 2014	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 29, 2023	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, no assertion criteria provided	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Mar 06, 2017	- -

Hereditary cancer-predisposing syndrome Benign:2

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 31, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Nov 19, 2014	This alteration is classified as 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. -

Medulloblastoma;C0346153:Familial cancer of breast;C0376358:Malignant tumor of prostate;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

Benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Fanconi anemia complementation group D1 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Familial cancer of breast Benign:1

Benign, criteria provided, single submitter

clinical testing

Baylor Genetics

Feb 23, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	0.41
DANN	Benign	0.37

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

LitVar

Other links and lift over

dbSNP: rs1801499; hg19: chr13-32910721; COSMIC: COSV66450642; COSMIC: COSV66450642;