rs81002905
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Variant summary
Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong
The NM_000059.4(BRCA2):c.632-16A>C 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 0.00000825 in 1,576,212 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 0.000026 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000063 ( 0 hom. )
Consequence
BRCA2
NM_000059.4 splice_polypyrimidine_tract, intron
NM_000059.4 splice_polypyrimidine_tract, intron
Scores
2
Clinical Significance
Conservation
PhyloP100: 1.56
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=-0.84).
BP6
?
Variant 13-32329427-A-C is Benign according to our data. Variant chr13-32329427-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 38036.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BRCA2 | NM_000059.4 | c.632-16A>C | splice_polypyrimidine_tract_variant, intron_variant | ENST00000380152.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.632-16A>C | splice_polypyrimidine_tract_variant, intron_variant | 5 | NM_000059.4 | A2 |
Frequencies
GnomAD3 genomes ? AF: 0.0000263 AC: 4AN: 152196Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.00000834 AC: 2AN: 239796Hom.: 0 AF XY: 0.00000772 AC XY: 1AN XY: 129596
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GnomAD4 exome AF: 0.00000632 AC: 9AN: 1424016Hom.: 0 Cov.: 27 AF XY: 0.00000564 AC XY: 4AN XY: 709578
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ClinVar
Significance: Benign/Likely benign
Submissions summary: Uncertain:1Benign:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Uncertain:1Benign:2
Uncertain significance, no assertion criteria provided | clinical testing | Breast Cancer Information Core (BIC) (BRCA2) | May 29, 2002 | - - |
Benign, no assertion criteria provided | clinical testing | Sharing Clinical Reports Project (SCRP) | May 02, 2012 | - - |
Likely benign, criteria provided, single submitter | clinical testing | Counsyl | Jul 25, 2017 | - - |
Hereditary breast ovarian cancer syndrome Benign:2
Benign, no assertion criteria provided | research | Hereditary Cancer Genetics group, Vall d'Hebron Institute of Oncology | Mar 01, 2019 | - - |
Benign, criteria provided, single submitter | clinical testing | Invitae | Dec 19, 2023 | - - |
not specified Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Feb 26, 2024 | Variant summary: BRCA2 c.632-16A>C alters a nucleotide located at a position not widely known to affect splicing. Several computational tools predict a significant impact on normal splicing: Two predict the variant strengthens a 3' acceptor site. The variant allele was found at a frequency of 8.3e-06 in 239796 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.632-16A>C has been reported in the literature in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome (e.g. Thomassen_2011, Caux-Moncoutier_2011, Infante_2006, and Velasco_2005). These reports do 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. The following publications have been ascertained in the context of this evaluation (PMID: 15937982, 16758124, 21120943, 21769658, 31343793). ClinVar contains an entry for this variant (Variation ID: 38036). Based on the evidence outlined above, the variant was classified as likely benign. - |
not provided Benign:1
Benign, criteria provided, single submitter | clinical testing | GeneDx | Mar 03, 2015 | - - |
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