13-32337617-C-T

Position:

chr13-32337617-C-T

Variant summary

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

The NM_000059.4(BRCA2):c.3262C>T(p.Pro1088Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000579 in 1,589,698 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. P1088P) has been classified as Benign.

Frequency

Genomes: 𝑓 0.000086 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000055 ( 0 hom. )

Consequence

BRCA2
NM_000059.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:18

Conservation

PhyloP100: 0.303

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=0.13751572).

BP6

Variant 13-32337617-C-T is Benign according to our data. Variant chr13-32337617-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 37829.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=10, Benign=3, Uncertain_significance=3}. Variant chr13-32337617-C-T 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.3262C>T	p.Pro1088Ser	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.3262C>T	p.Pro1088Ser	missense_variant	11/27	5	NM_000059.4	ENSP00000369497	A2

Frequencies

GnomAD3 genomes

AF:

0.0000856

AC:

AN:

151954

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000459

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:

0.0000883

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000429

AC:

AN:

233266

Hom.:

AF XY:

0.0000476

AC XY:

AN XY:

126062

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000130

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:

0.0000556

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000549

AC:

AN:

1437744

Hom.:

Cov.:

AF XY:

0.0000449

AC XY:

AN XY:

713064

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000124

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000663

Gnomad4 OTH exome

AF:

0.0000169

GnomAD4 genome

AF:

0.0000856

AC:

AN:

151954

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74192

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000459

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000883

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000891

Hom.:

Bravo

AF:

0.0000642

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:18

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:8

Likely benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Sep 06, 2022	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	May 17, 2018	This variant is associated with the following publications: (PMID: 27376475, 28651617, 26517685, 23525077, 20858050, 30151275) -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Feb 01, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Jan 10, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Mar 02, 2023	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute	-	- -
Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Likely benign, no assertion criteria provided	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Jul 27, 2017	- -

Breast-ovarian cancer, familial, susceptibility to, 2

Uncertain:2Benign:3

Benign, no assertion criteria provided	clinical testing	Sharing Clinical Reports Project (SCRP)	Oct 01, 2008	- -
Uncertain significance, no assertion criteria provided	clinical testing	Breast Cancer Information Core (BIC) (BRCA2)	May 29, 2002	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	May 26, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Jun 15, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -

Hereditary cancer-predisposing syndrome

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Oct 31, 2018	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. -
Likely benign, criteria provided, single submitter	curation	Sema4, Sema4	Jan 10, 2022	- -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jun 22, 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). -

Hereditary breast ovarian cancer syndrome

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 27, 2024	- -
Likely benign, criteria provided, single submitter	curation	German Consortium for Hereditary Breast and Ovarian Cancer, University Hospital Cologne	Dec 19, 2023	BRCA2 "coldspot" variant. According to the ClinGen ENIGMA BRCA2 v1.0.0 criteria we chose these criteria: BP1 (strong benign): missense outside a (potentially) clinically important functional domain AND no splicing predicted (SpliceAI ≤0.1), BS1 (supporting benign): FAF > 0.00002 -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Mar 28, 2021

Variant summary: BRCA2 c.3262C>T (p.Pro1088Ser) 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 4.3e-05 in 233286 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in BRCA2 causing Hereditary Breast And Ovarian Cancer Syndrome (4.3e-05 vs 0.00075), allowing no conclusion about variant significance. c.3262C>T has been reported in the literature as a reportedly somatic occurrence in non-MSI positive samples from patients with esophageal adenocarcinoma (example, Dulac_2013) and in the MSI instable FFPE specimen derived from a patient with hereditary endometrial carcinoma in whom a germline pathogenic variant in the MSH6 gene had been identified (Jori_2015, patient 5, MSI unstable, MSH6 variant c.3729_3732dupATTA). The variant has also been reported as a germline mutation in the literature in patients with breast/ovarian cancer and head and neck squamous cell carcinoma (HNSCC), without strong evidence for causality (example, Coulet_2010, Buzolin_2017, Schenkel_2016, Chandrasekharappa_2017). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. Multiple co-occurrences with other pathogenic variant(s) have been reported in the BIC database (2 - BRCA1 exon13ins6kb, 1 - BRCA1 c.3549_3550delinsT (p.K1183fsX), and 1 - BRCA1 c.4357+1G>A), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Ten clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Multiple laboratories reported the variant with conflicting assessments (benign/likely benign, n=8, VUS, n=2). Taken together, based on at-least 5 reports of the occurrence of this variant in patients with an alternative molecular basis of disease attributed to mutations in MSH6 (n=1) or BRCA1 (n=4) genes and the majority concordance among peers supporting a neutral outcome as outlined above, the variant was classified as benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.40

CADD

Benign

2.3

DANN

Benign

0.62

Eigen

Benign

-0.66

Eigen_PC

Benign

-0.67

FATHMM_MKL

Benign

0.29

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.14

T;T

MetaSVM

Benign

-0.92

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.25

PROVEAN

Uncertain

-3.0

D;D

REVEL

Benign

0.17

Sift

Benign

0.30

T;T

Sift4G

Benign

0.47

T;T

Vest4

0.18

MutPred

0.33

Loss of catalytic residue at P1088 (P = 0.1583);Loss of catalytic residue at P1088 (P = 0.1583);

MVP

0.80

MPC

0.024

ClinPred

0.034

GERP RS

2.7

gMVP

0.20

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