rs1057517565
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000059.4(BRCA2):c.4570_4573del(p.Phe1524IlefsTer18) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.
Frequency
Genomes: not found (cov: 33)
Consequence
BRCA2
NM_000059.4 frameshift
NM_000059.4 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 6.28
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 Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 13-32338924-TTTTC-T is Pathogenic according to our data. Variant chr13-32338924-TTTTC-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 371845.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.4570_4573del | p.Phe1524IlefsTer18 | frameshift_variant | 11/27 | ENST00000380152.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.4570_4573del | p.Phe1524IlefsTer18 | frameshift_variant | 11/27 | 5 | NM_000059.4 | A2 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
We have no GnomAD4 exomes data on this position. Probably position not covered by the project.
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:6
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Pathogenic:2
Likely pathogenic, criteria provided, single submitter | clinical testing | Counsyl | May 05, 2016 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | KCCC/NGS Laboratory, Kuwait Cancer Control Center | Jun 06, 2023 | A known pathogenic mutation was detected in the BRCA2 gene (c.4570_4573delTTTC). This sequence change creates a premature translational stop signal (p.Phe1524Ilefs*18) in the BRCA2 gene. It is expected to result in an absent or disrupted protein product. This variant is not present in population databases (ExAC no frequency). This variant has been observed in an individual affected with breast cancer (PMID: 26187060). ClinVar contains an entry for this variant (Variation ID: 371845) with 4 submissions of which describer it as pathogenic. Loss-of-function variants in BRCA2 are known to be pathogenic (PMID: 20104584). Therefore, this variant has been classified as Pathogenic. - |
Hereditary breast ovarian cancer syndrome Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Mar 28, 2023 | For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 371845). This premature translational stop signal has been observed in individual(s) with breast cancer (PMID: 26187060). This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Phe1524Ilefs*18) in the BRCA2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BRCA2 are known to be pathogenic (PMID: 20104584). - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Apr 23, 2018 | Variant summary: BRCA2 c.4570_4573delTTTC (p.Phe1524IlefsX18) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory (eg. c.4587dupG, p.Lys1530fsX4; c.4631delA, p.Asn1544fsX24; c.4631dupA, p.Asn1544fsX4). The variant was absent in 120602 control chromosomes. c.4570_4573delTTTC has been reported in the literature in one individual affected with breast cancer (Kwong_2015). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. One laboratory classified the variant as likely pathogenic. Based on the evidence outlined above, the variant was classified as likely pathogenic. - |
Hereditary cancer-predisposing syndrome Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Jan 15, 2020 | This variant deletes 4 nucleotides in exon 11 of the BRCA2 gene, creating a frameshift and premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Loss of BRCA2 function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. - |
Familial cancer of breast Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Sep 29, 2022 | - - |
Computational scores
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at