rs397507265
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_000059.4(BRCA2):c.1205del(p.Gly402ValfsTer2) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,230 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★★). Synonymous variant affecting the same amino acid position (i.e. G402G) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_000059.4 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BRCA2 | NM_000059.4 | c.1205del | p.Gly402ValfsTer2 | frameshift_variant | 10/27 | ENST00000380152.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BRCA2 | ENST00000380152.8 | c.1205del | p.Gly402ValfsTer2 | frameshift_variant | 10/27 | 5 | NM_000059.4 | A2 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152230Hom.: 0 Cov.: 32
GnomAD4 exome Cov.: 35
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152230Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74372
ClinVar
Submissions by phenotype
Breast-ovarian cancer, familial, susceptibility to, 2 Pathogenic:4
Pathogenic, no assertion criteria provided | clinical testing | Sharing Clinical Reports Project (SCRP) | Mar 11, 2008 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Human Genome Sequencing Center Clinical Lab, Baylor College of Medicine | Oct 08, 2018 | The c.1205delG (p.Gly402Valfs*2) variant in the BRCA2 gene is predicted to introduce a premature translation termination codon. This variant has been reported in one patient with triple-negative breast cancer (PMID 25428789), one patient with high likelihood of being a mutation carrier predicted by BRCAPRO statistical modeling (PMID 16234499), and multiple individuals who were referred for clinical testing in other clinical labs. This variant is not observed in gnomAD. Therefore, the c.1205delG (p.Gly402Valfs*2) variant in the BRCA2 gene is classified as pathogenic. - |
Pathogenic, criteria provided, single submitter | clinical testing | Consortium of Investigators of Modifiers of BRCA1/2 (CIMBA), c/o University of Cambridge | Oct 02, 2015 | - - |
Pathogenic, reviewed by expert panel | curation | Evidence-based Network for the Interpretation of Germline Mutant Alleles (ENIGMA) | Sep 08, 2016 | Variant allele predicted to encode a truncated non-functional protein. - |
Hereditary breast ovarian cancer syndrome Pathogenic:4
Pathogenic, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Jul 13, 2018 | The p.Gly402ValfsX2 variant in BRCA2 has been reported in at least 3 African Ame rican individuals with a personal or family history of breast and/or ovarian can cer (Nanda 2005, Lynce 2015, Churpek 2015). This variant has been identified in 1/8734 African chromosomes by the Genome Aggregation Database (gnomAD, http://gn omad.broadinstitute.org). This variant is predicted to cause a frameshift, which alters the protein?s amino acid sequence beginning at position 402 and leads to a premature termination codon 2 amino acids downstream. This alteration is then predicted to lead to a truncated or absent protein. Heterozygous loss of functi on of the BRCA2 gene is an established disease mechanism in hereditary breast an d ovarian cancer (HBOC). In addition, this variant was classified as Pathogenic on Sept 8, 2016 by the ClinGen-approved ENIGMA expert panel (ClinVar SCV00030040 6.2). In summary, this variant meets criteria to be classified as pathogenic for HBOC in an autosomal dominant manner based upon the presence in probands and th e predicted impact on the protein. ACMG/AMP Criteria applied: PVS1, PM2, PS4_Sup porting. - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Sep 23, 2023 | This premature translational stop signal has been observed in individual(s) with breast and/or ovarian cancer (PMID: 16234499, 25428789, 26250392). This variant is also known as 1433delG. ClinVar contains an entry for this variant (Variation ID: 37730). For these reasons, this variant has been classified as Pathogenic. This variant is present in population databases (rs397507265, gnomAD 0.01%). This sequence change creates a premature translational stop signal (p.Gly402Valfs*2) 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). - |
Pathogenic, no assertion criteria provided | research | Research Molecular Genetics Laboratory, Women's College Hospital, University of Toronto | Jan 31, 2014 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Jan 19, 2017 | Variant summary: The BRCA2 c.1205delG (p.Gly402Valfs) variant results in a premature termination codon, predicted to cause a truncated or absent BRCA2 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 (e.g c.1257delT, p.Cys419fs). One in silico tool predicts a damaging outcome for this variant. This variant is absent in 120776 control chromosomes. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as pathogenic. Taken together, this variant is classified as pathogenic. - |
not provided Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Quest Diagnostics Nichols Institute San Juan Capistrano | Dec 31, 2019 | The variant results in a shift of the reading frame, and is therefore predicted to result in the loss of a functional protein. Found in at least one patient with expected phenotype for this gene, and found in general population data at a frequency that is consistent with pathogenicity. - |
Pathogenic, criteria provided, single submitter | clinical testing | GeneDx | May 25, 2023 | Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); Truncating variants in this gene are considered pathogenic by a well-established clinical consortium and/or database; Observed in individuals with personal and/or family histories consistent with pathogenic variants in this gene (Nanda et al., 2005; Churpek et al., 2015; Lynce et al., 2015; Matejcic et al., 2020); Also known as 1433delG; This variant is associated with the following publications: (PMID: 25428789, 26250392, 16234499, 26295337, 26681312, 30720243, 31447099, 32832836) - |
Hereditary cancer-predisposing syndrome Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Ambry Genetics | Dec 23, 2022 | The c.1205delG pathogenic mutation, located in coding exon 9 of the BRCA2 gene, results from a deletion of one nucleotide at nucleotide position 1205, causing a translational frameshift with a predicted alternate stop codon (p.G402Vfs*2). This mutation has been reported in high-risk African-American breast cancer patients (Nanda R et al. JAMA. 2005; 294:1925-33; Churpek JE et al. Breast Cancer Res Treat. 2015 Jan;149(1):31-9). This alteration was identified in 1/10030 consecutive patients referred for evaluation by an NGS hereditary cancer panel (Susswein LR et al. Genet. Med., 2016 08;18:823-32). Of note, this mutation is also designated as 1433delG in published literature. In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. - |
Familial cancer of breast Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Mar 15, 2022 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at