rs773097109
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Variant summary
Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6
The NM_000059.4(BRCA2):c.316+13A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000555 in 1,604,672 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 Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)
Exomes 𝑓: 0.000058 ( 0 hom. )
Consequence
BRCA2
NM_000059.4 intron
NM_000059.4 intron
Scores
2
Clinical Significance
Conservation
PhyloP100: -0.207
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 Likely_benign. Variant got -5 ACMG points.
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.89).
BP6
Variant 13-32319338-A-G is Benign according to our data. Variant chr13-32319338-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 236846.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Uncertain_significance=2, Benign=1}.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| BRCA2 | NM_000059.4 | c.316+13A>G | intron_variant | ENST00000380152.8 | NP_000050.3 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| BRCA2 | ENST00000380152.8 | c.316+13A>G | intron_variant | 5 | NM_000059.4 | ENSP00000369497.3 | ||||
| BRCA2 | ENST00000530893.7 | c.-54+13A>G | intron_variant | 1 | ENSP00000499438.2 | |||||
| BRCA2 | ENST00000614259.2 | n.316+13A>G | intron_variant | 2 | ENSP00000506251.1 |
Frequencies
GnomAD3 genomes 0.0000328 AC: 5AN: 152234Hom.: 0 Cov.: 33
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GnomAD3 exomes AF: 0.0000242 AC: 6AN: 247610Hom.: 0 AF XY: 0.0000223 AC XY: 3AN XY: 134506
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GnomAD4 exome AF: 0.0000578 AC: 84AN: 1452438Hom.: 0 Cov.: 31 AF XY: 0.0000581 AC XY: 42AN XY: 722982
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GnomAD4 genome 0.0000328 AC: 5AN: 152234Hom.: 0 Cov.: 33 AF XY: 0.0000403 AC XY: 3AN XY: 74382
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:3Benign:6
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not specified Benign:2
| Likely benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Dec 23, 2022 | Variant summary: BRCA2 c.316+13A>G 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 allele was found at a frequency of 2.4e-05 in 247610 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.316+13A>G has been reported in the literature in at least one individual affected with Hereditary Breast And Ovarian Cancer Syndrome (Caux_Moncoutier_2011). This report does not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified as VUS (n=1), Likely Benign (n=4) and Benign (n=1). Based on the evidence outlined above, the variant was classified as likely benign. - |
| Benign, criteria provided, single submitter | clinical testing | GeneDx | Sep 15, 2015 | 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. - |
Hereditary cancer-predisposing syndrome Benign:2
| Likely benign, criteria provided, single submitter | curation | Sema4, Sema4 | Apr 13, 2021 | - - |
| Likely benign, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Apr 22, 2016 | - - |
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Fanconi anemia complementation group D1 Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Malignant tumor of breast Uncertain:1
| Uncertain significance, no assertion criteria provided | clinical testing | Department of Pathology and Laboratory Medicine, Sinai Health System | - | The BRCA2 c.316+13A>G variant was identified in 1 of 3050 proband chromosomes (frequency: 0.0003) from individuals or families with a history of breast (including male), colon, or ovarian cancer (Caux-Moncoutier 2011). The variant was also identified in dbSNP (ID: rs773097109) as "With other allele", ClinVar (classified as benign by GeneDx; as likely benign by Invitae, Color, and Prevention Genetics; and as uncertain significance by Illumina Clinical Services Laboratory and Integrated Genetics/Laboratory Corporation of America), and in UMD-LSDB (14x as unclassified variant). The variant was not identified in LOVD 3.0. The variant was identified in control databases in 7 of 274246 chromosomes at a frequency of 0.00003 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 1 of 23628 chromosomes (freq: 0.00004) and European in 6 of 124828 chromosomes (freq: 0.00005), while the variant was not observed in the Other, Latino, Ashkenazi Jewish, East Asian, Finnish, or South Asian populations. The variant occurs outside of the splicing consensus sequence and 1 of 5 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, Human Splicing Finder) predicts a greater than 10% difference in splicing; this is not very predictive of pathogenicity. 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. - |
not provided Benign:1
| Likely benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Oct 27, 2017 | - - |
Hereditary breast ovarian cancer syndrome Benign:1
| Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 19, 2024 | - - |
Computational scores
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
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Find out detailed SpliceAI scores and Pangolin per-transcript scores at