rs80358896

Positions:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_000059.4(BRCA2):c.6739A>G(p.Ser2247Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000551 in 1,613,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000057 ( 0 hom. )

Consequence

BRCA2
NM_000059.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:10

Conservation

PhyloP100: 0.0580

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.13514414).

BP6

Variant 13-32341094-A-G is Benign according to our data. Variant chr13-32341094-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 38063.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=7, Benign=1, Uncertain_significance=3}. Variant chr13-32341094-A-G is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BRCA2	NM_000059.4 linkuse as main transcript	c.6739A>G	p.Ser2247Gly	missense_variant	11/27	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8 linkuse as main transcript	c.6739A>G	p.Ser2247Gly	missense_variant	11/27	5	NM_000059.4	ENSP00000369497	A2

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152230

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000278

AC:

AN:

251362

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135860

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000616

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000575

AC:

AN:

1461656

Hom.:

Cov.:

AF XY:

0.0000646

AC XY:

AN XY:

727146

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000728

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152230

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74372

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000340

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:10

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:2

Likely benign, no assertion criteria provided	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Feb 17, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Jun 17, 2022	In the published literature, this variant has been reported in individuals or families affected with breast cancer (PMIDs: 9400938 (1997), 19491284 (2009), 19471317 (2009), and 33471991 (2021)). The frequency of this variant in the general population, 0.000062 (8/129102 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	May 08, 2020	This variant is associated with the following publications: (PMID: 15983021, 25348012, 19491284, 19471317, 22476429, 24817641, 9400938) -
Uncertain significance, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 05, 2020	The BRCA2 c.6739A>G; p.Ser2247Gly variant (rs80358896) is reported in the literature in multiple individuals affected with breast cancer, but often without specific phenotype information or with other unclassified variants in BRCA2 (Caux-Moncoutier 2009, Haffty 2006, Mavraki 1997). This variant is reported in ClinVar (Variation ID: 38063), and is found in the non-Finnish European population with an allele frequency of 0.0062% (8/129102 alleles) in the Genome Aggregation Database. The serine at codon 2247 is weakly conserved, but computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.324). Given the lack of clinical and functional data, the significance of the p.Ser2247Gly variant is uncertain at this time. References: Caux-Moncoutier V et al. Impact of BRCA1 and BRCA2 variants on splicing: clues from an allelic imbalance study. Eur J Hum Genet. 2009 Nov;17(11):1471-80. Haffty BG et al. Racial differences in the incidence of BRCA1 and BRCA2 mutations in a cohort of early onset breast cancer patients: African American compared to white women. J Med Genet. 2006 Feb;43(2):133-7. Mavraki E et al. Germline BRCA2 mutations in men with breast cancer. Br J Cancer. 1997;76(11):1428-31. -

Hereditary cancer-predisposing syndrome

Benign:4

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	May 02, 2016	- -
Likely benign, criteria provided, single submitter	curation	University of Washington Department of Laboratory Medicine, University of Washington	Mar 23, 2023	Missense variant in a coldspot region where missense variants are very unlikely to be pathogenic (PMID:31911673). -
Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Sep 25, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 09, 2019	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. -

Breast-ovarian cancer, familial, susceptibility to, 2

Uncertain:2Benign:1

Uncertain significance, no assertion criteria provided	clinical testing	Breast Cancer Information Core (BIC) (BRCA2)	May 29, 2002	- -
Likely benign, no assertion criteria provided	clinical testing	Sharing Clinical Reports Project (SCRP)	Feb 25, 2011	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	May 20, 2016	- -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

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

Dec 15, 2022

Variant summary: BRCA2 c.6739A>G (p.Ser2247Gly) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 2.8e-05 in 251430 control chromosomes (gnomAD and publication data). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.6739A>G has been reported in the literature in individuals affected with Breast and/or Ovarian Cancer (example, Mavarki_1997, Haffty_2006, Haffty_2009, Lu_2012, Caux-Montcoutier_2009). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. At-least three co-occurrences with other pathogenic variants have been reported in the BIC database as well as at our laboratory (BRCA1 c.3700_3704delGTAAA, p.Val1234GlnfsX8; BRCA1 c.4524G>A, p.Trp1508*; BRCA1 c.5096G>A, p.Arg1699Gln), providing supporting evidence for a benign role. At least one publication reports experimental evidence evaluating an impact on protein function, however, does not allow convincing conclusions about the variant effect. Eight ClinVar submitters (evaluation after 2014) cite the variant as uncertain significance (n=3), likely benign (n=5) and benign (n=1). Based on the evidence outlined above, the variant was classified as likely benign. -

Familial cancer of breast

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

MGZ Medical Genetics Center

Feb 09, 2024

ACMG codes applied following ENIGMA VCEP rules: BP1_STR, BS1_SUP -

Hereditary breast ovarian cancer syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 31, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.29

CADD

Benign

3.2

DANN

Benign

0.91

Eigen

Benign

-0.99

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.033

M_CAP

Benign

0.068

MetaRNN

Benign

0.14

T;T

MetaSVM

Benign

-0.87

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.73

N;N

REVEL

Uncertain

0.32

Sift

Benign

0.12

T;T

Sift4G

Benign

0.37

T;T

Vest4

0.18

MVP

0.85

MPC

0.020

ClinPred

0.025

GERP RS

-3.9

gMVP

0.067

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over