rs879255467
Variant summary
Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong
The NM_000059.4(BRCA2):c.7977-14G>A variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000561 in 1,605,102 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000055 ( 0 hom. )
Consequence
BRCA2
NM_000059.4 splice_polypyrimidine_tract, intron
NM_000059.4 splice_polypyrimidine_tract, intron
Scores
2
Clinical Significance
Conservation
PhyloP100: -2.47
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]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -12 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.86).
BP6
?
Variant 13-32363165-G-A is Benign according to our data. Variant chr13-32363165-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 415683.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr13-32363165-G-A is described in Lovd as [Likely_benign]. Variant chr13-32363165-G-A is described in Lovd as [Benign].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BRCA2 | NM_000059.4 | c.7977-14G>A | splice_polypyrimidine_tract_variant, intron_variant | ENST00000380152.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.7977-14G>A | splice_polypyrimidine_tract_variant, intron_variant | 5 | NM_000059.4 | A2 |
Frequencies
GnomAD3 genomes ? AF: 0.00000658 AC: 1AN: 151954Hom.: 0 Cov.: 32
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GnomAD4 exome AF: 0.00000551 AC: 8AN: 1453148Hom.: 0 Cov.: 30 AF XY: 0.00000691 AC XY: 5AN XY: 723488
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ClinVar
Significance: Benign/Likely benign
Submissions summary: Benign:9
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Benign:3
Benign, criteria provided, single submitter | clinical testing | Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center | Sep 21, 2015 | - - |
Likely benign, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Jun 26, 2023 | - - |
Likely benign, criteria provided, single submitter | clinical testing | Genome Diagnostics Laboratory, University Medical Center Utrecht | May 11, 2015 | - - |
not specified Benign:2
Likely benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Sep 09, 2019 | Variant summary: BRCA2 c.7977-14G>A alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant was absent in 247964 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.7977-14G>A in individuals affected with Hereditary Breast and Ovarian Cancer and no experimental evidence demonstrating its impact on protein function have been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign (n=2)/likely benign(n=3). Based on the evidence outlined above, the variant was classified as likely benign. - |
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Jun 13, 2017 | 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. - |
not provided Benign:2
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+ | - | - - |
Hereditary cancer-predisposing syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Mar 13, 2017 | - - |
Hereditary breast ovarian cancer syndrome Benign:1
Benign, criteria provided, single submitter | clinical testing | Invitae | Dec 18, 2023 | - - |
Computational scores
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at