NM_000059.4:c.7008-5T>C

Variant names:

• chr13-32354856-T-C
• rs397507380
• NM_000059.4:c.7008-5T>C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PM2_Supporting BP7_Strong

This summary comes from the ClinGen Evidence Repository: The c.7008-5T>C variant is an intronic variant occurring in intron 13 of the BRCA2 gene. This variant is absent from gnomAD v2.1 (exomes only, non-cancer subset, read depth ≥25) and gnomAD v3.1 (non-cancer subset, read depth ≥25) (PM2_Supporting met). This BRCA2 intronic variant is outside of the native donor and acceptor 1,2 splice sites, and the SpliceAI predictor score of 0.12 indicates that impact on splicing is unclear (score range 0.10-0.20) (PP3 and BP4 not met). This is an intronic variant, and mRNA experimental analysis indicates no impact on splicing (PMID:31191615), considered strong evidence against pathogenicity (BP7_Strong (RNA)).In summary, this variant meets the criteria to be classified as a Likely benign variant for BRCA2-related cancer predisposition based on the ACMG/AMP criteria applied as specified by the ENIGMA BRCA1/2 VCEP (PM2_Supporting, BP7_Strong (RNA)). LINK:https://erepo.genome.network/evrepo/ui/classification/CA024740/MONDO:0012933/097

• Frequency: Genomes: not found (cov: 32)
• Consequence: BRCA2 NM_000059.4 splice_region, intron
• Scores: Splicing: ADA: 0.01655
• Clinical Significance: Likely benign reviewed by expert panel U:5 B:5
• Conservation: PhyloP100: 1.42

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 Likely_benign. Variant got -3 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• BP7: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRCA2	NM_000059.4	c.7008-5T>C		splice_region_variant, intron_variant	Intron 13 of 26	ENST00000380152.8	NP_000050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRCA2	ENST00000380152.8	c.7008-5T>C		splice_region_variant, intron_variant	Intron 13 of 26	5	NM_000059.4	ENSP00000369497.3
BRCA2	ENST00000530893.7	c.6639-5T>C		splice_region_variant, intron_variant	Intron 13 of 26	1		ENSP00000499438.2
BRCA2	ENST00000614259.2	n.7008-5T>C		splice_region_variant, intron_variant	Intron 12 of 25	2		ENSP00000506251.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:5 Benign:5

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1 Benign:2

Sep 07, 2021

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Mar 15, 2021

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. -

Nov 26, 2024

Color Diagnostics, LLC DBA Color Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified Uncertain:1 Benign:1

Sep 13, 2016

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 23, 2025

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: BRCA2 c.7008-5T>C alters a non-conserved nucleotide located at a position not widely known to affect splicing. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant was absent in 250206 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.7008-5T>C in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 38078). Based on the evidence outlined above, the variant was classified as likely benign. -

Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1

Mar 03, 2011

Sharing Clinical Reports Project (SCRP)

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided Uncertain:1

Jul 30, 2018

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is denoted BRCA2 c.7008-5T>C or IVS13-5T>C and consists of a T>C nucleotide substitution at the -5 position of intron 13 of the BRCA2 gene. Using alternate nomenclature, this variant would be defined as BRCA2 7236-5T>C. In silico analysis, which includes splice predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; however, in the absence of RNA or functional studies, the actual effect of this variant is unknown.? This variant has not, to our knowledge, been published in the literature as a pathogenic or benign germline variant. BRCA2 c.7008-5T>C was not observed in large population cohorts. Based on currently available evidence, it is unclear whether BRCA2 c.7008-5T>C is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -

Malignant tumor of breast Uncertain:1

-

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The BRCA2 c.7008-5T>C variant was not identified in the literature nor was it identified in the UMD-LSDB database. The variant was identified in dbSNP (ID: rs397507380) as "With Uncertain significance allele", ClinVar (classified as uncertain significance by GeneDx, Invitae, Ambry Genetics, and four other submitters), and in LOVD 3.0 (1x as uncertain). The variant was not identified in the following control databases: the Exome Aggregation Consortium (August 8th 2016), or the Genome Aggregation Database (Feb 27, 2017). The c.7008-5T>C variant is located in the 3' splice region but does not affect the invariant -1 and -2 positions. However, positions -3 and -5 to -12 are part of the splicing consensus sequence and variants involving these positions sometimes affect splicing. In addition, 1 of 4 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) predict a greater than 10% difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

BRCA2-related cancer predisposition Benign:1

Jun 11, 2024

ClinGen ENIGMA BRCA1 and BRCA2 Variant Curation Expert Panel, ClinGen

Significance: Likely benign

Review Status: reviewed by expert panel

Collection Method: curation

The c.7008-5T>C variant is an intronic variant occurring in intron 13 of the BRCA2 gene. This variant is absent from gnomAD v2.1 (exomes only, non-cancer subset, read depth >=25) and gnomAD v3.1 (non-cancer subset, read depth >=25) (PM2_Supporting met). This BRCA2 intronic variant is outside of the native donor and acceptor 1,2 splice sites, and the SpliceAI predictor score of 0.12 indicates that impact on splicing is unclear (score range 0.10-0.20) (PP3 and BP4 not met). This is an intronic variant, and mRNA experimental analysis indicates no impact on splicing (PMID: 31191615), considered strong evidence against pathogenicity (BP7_Strong (RNA)). In summary, this variant meets the criteria to be classified as a Likely benign variant for BRCA2-related cancer predisposition based on the ACMG/AMP criteria applied as specified by the ENIGMA BRCA1/2 VCEP (PM2_Supporting, BP7_Strong (RNA)). -

Hereditary breast ovarian cancer syndrome Benign:1

Dec 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely 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	-0.81
CADD	Benign	4.2
DANN	Benign	0.49

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.017
dbscSNV1_RF	Benign	0.27
SpliceAI score (max)		0.12		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: rs397507380; hg19: chr13-32928993;