13-32398396-C-T

Variant names:

• chr13-32398396-C-T
• rs80359247
• NM_000059.4:c.9883C>T

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_000059.4(BRCA2):​c.9883C>T​(p.Gln3295*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: BRCA2 NM_000059.4 stop_gained
• Clinical Significance: Pathogenic reviewed by expert panel P:10
• Conservation: PhyloP100: 2.09

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 Pathogenic. Variant got 14 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 11 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 13-32398396-C-T is Pathogenic according to our data. Variant chr13-32398396-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 52911.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr13-32398396-C-T is described in Lovd as [Pathogenic]. Variant chr13-32398396-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA2	NM_000059.4	c.9883C>T	p.Gln3295*	stop_gained	Exon 27 of 27	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8	c.9883C>T	p.Gln3295*	stop_gained	Exon 27 of 27	5	NM_000059.4	ENSP00000369497.3
BRCA2	ENST00000530893.7	c.9514C>T	p.Gln3172*	stop_gained	Exon 27 of 27	1		ENSP00000499438.2
BRCA2	ENST00000614259.2	n.*1941C>T		non_coding_transcript_exon_variant	Exon 26 of 26	2		ENSP00000506251.1
BRCA2	ENST00000614259.2	n.*1941C>T		3_prime_UTR_variant	Exon 26 of 26	2		ENSP00000506251.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:10

Revision: reviewed by expert panel

Submissions by phenotype

Breast-ovarian cancer, familial, susceptibility to, 2 Pathogenic:3

Oct 02, 2015

Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA), c/o University of Cambridge

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 08, 2016

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

Significance: Pathogenic

Review Status: reviewed by expert panel

Collection Method: curation

Variant allele predicted to encode a truncated non-functional protein. -

Jul 07, 2000

Breast Cancer Information Core (BIC) (BRCA2)

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome Pathogenic:2

Jan 25, 2025

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Q3295* pathogenic mutation (also known as c.9883C>T), located in coding exon 26 of the BRCA2 gene, results from a C to T substitution at nucleotide position 9883. This changes the amino acid from a glutamine to a stop codon within coding exon 26. This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Sep 11, 2019

Color Diagnostics, LLC DBA Color Health

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant changes 1 nucleotide in exon 27 of the BRCA2 gene, creating a premature translation stop signal in the last coding exon. This variant is also known as 10111C>T and Q3295X in the literature. The mutant transcript is predicted to escape nonsense-mediated decay and be expressed as a truncated protein. This variant is expected to disrupt the RAD51 binding domain that has been reported to be essential for homologous recombination and DNA repair (PMID: 17515903). To our knowledge, functional studies have not been performed for this variant. This variant has been reported in families affected with or at risk for breast and ovarian cancer (PMID: 22762150, 28726806, 29446198). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Based on the available evidence, this variant is classified as Likely Pathogenic. -

Hereditary breast ovarian cancer syndrome Pathogenic:2

Jan 31, 2014

Research Molecular Genetics Laboratory, Women's College Hospital, University of Toronto

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Nov 14, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Gln3295*) in the BRCA2 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 124 amino acid(s) of the BRCA2 protein. This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with personal and/or family history of breast or ovarian cancer (PMID: 22762150, 29446198). ClinVar contains an entry for this variant (Variation ID: 52911). This variant disrupts a region of the BRCA2 protein in which other variant(s) (p.Tyr3308*, p.Gln3299*) have been determined to be pathogenic (PMID: 8896551, 18097605, 18593900, 18607349, 20104584; internal data). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Malignant tumor of urinary bladder Pathogenic:1

-

Laboratory of Urology, Hospital Clinic de Barcelona

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

not provided Pathogenic:1

Jan 01, 2020

GeneKor MSA

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal at codon 3295 of the BRCA2 protein. It is expected to result in an absent or disrupted protein product. Truncating variants in BRCA2 are known to be pathogenic. The mutation database ClinVar contains entries for this variant (Variation ID: 52911). -

Familial cancer of breast Pathogenic:1

Sep 21, 2023

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.57	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	40
DANN	Uncertain	0.99
Eigen	Pathogenic	0.80
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.82	D
Vest4		0.64
GERP RS		3.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs80359247; hg19: chr13-32972533;