rs587781292
Variant summary
Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong
The NM_032043.3(BRIP1):c.133G>T(p.Glu45*) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000744 in 1,613,778 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_032043.3 stop_gained
Scores
Clinical Significance
Conservation
Publications
- familial ovarian cancerInheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
- Fanconi anemiaInheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Illumina
- Fanconi anemia complementation group JInheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
- hereditary breast carcinomaInheritance: AD Classification: STRONG, LIMITED, NO_KNOWN Submitted by: ClinGen, Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
- colorectal adenomaInheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
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ACMG classification
Our verdict: Pathogenic. The variant received 16 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| BRIP1 | NM_032043.3 | c.133G>T | p.Glu45* | stop_gained | Exon 3 of 20 | ENST00000259008.7 | NP_114432.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| BRIP1 | ENST00000259008.7 | c.133G>T | p.Glu45* | stop_gained | Exon 3 of 20 | 1 | NM_032043.3 | ENSP00000259008.2 |
Frequencies
GnomAD3 genomes AF: 0.0000263 AC: 4AN: 152188Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00000398 AC: 1AN: 251404 AF XY: 0.00000736 show subpopulations
GnomAD4 exome AF: 0.00000547 AC: 8AN: 1461590Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3AN XY: 727096 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000263 AC: 4AN: 152188Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 74352 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Familial cancer of breast;C1836860:Fanconi anemia complementation group J Pathogenic:2
This sequence change creates a premature translational stop signal (p.Glu45*) in the BRIP1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BRIP1 are known to be pathogenic (PMID: 16116423, 17033622, 21964575). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This premature translational stop signal has been observed in individual(s) with hereditary cancer (PMID: 24763289). ClinVar contains an entry for this variant (Variation ID: 140808). RNA analysis performed to evaluate the impact of this premature translational stop signal on mRNA splicing indicates it does not significantly alter splicing (internal data). For these reasons, this variant has been classified as Pathogenic. -
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not provided Pathogenic:2
The BRIP1 p.Glu45* variant was identified in 2 of 10630 proband chromosomes (frequency: 0.0002) from individuals or families with hereditary breast and ovarian cancer and was not identified in 6862 control chromosomes from healthy individuals (LaDuca 2014, Ramus 2015). The variant was also identified in dbSNP (ID: rs587781292) as "Pathogenic", ClinVar (as pathogenic by Ambry Genetics, Invitae, and GeneDx), and Cosmic databases. The variant was not identified in the MutDB and Zhejiang Colon Cancer Database. The variant was identified in control databases in 1 of 30980 chromosomes at a frequency of 0.00003 (Genome Aggregation Database Feb 27, 2017), in the European population in 1 of 15010 chromosomes (freq: 0.00007); but not in in the African, Other, Latino, Ashkenazi Jewish, East Asian, Finnish, o South Asian populations. The p.Glu45* variant leads to a premature stop codon at position 45 which is predicted to lead to a truncated or absent protein and loss of function. Loss of function variants of the BRIP1 gene are an established mechanism of disease in hereditary breast and ovarian cancer and is the type of variant expected to cause the disorder. In summary, based on the above information this variant meets our laboratory’s criteria to be classified as pathogenic. -
Nonsense 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 a significant frequency in large population cohorts (Lek 2016); Observed in individuals with a personal or family history consistent with pathogenic variants in this gene (Laduca 2014, Ramus 2015); This variant is associated with the following publications: (PMID: 24763289, 26315354, 26921362, 29625052, 32885271) -
Familial cancer of breast Pathogenic:2
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This variant is considered pathogenic. This variant creates a termination codon and is predicted to result in premature protein truncation. -
Hereditary cancer-predisposing syndrome Pathogenic:2
This variant changes 1 nucleotide in exon 3 of the BRIP1 gene, creating a premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in an individual affected with ovarian cancer (PMID: 26315354) and an individual suspected to be affected with hereditary breast and ovarian cancer (PMID: 24763289). This variant also has been detected in a breast cancer case-control meta-analysis in 2/53461 unaffected individuals and absent in 60466 cases (PMID: 33471991; Leiden Open Variation Database DB-ID BRIP1_000746). This variant has also been identified in 2/282808 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Loss of BRIP1 function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -
The p.E45* pathogenic mutation (also known as c.133G>T), located in coding exon 2 of the BRIP1 gene, results from a G to T substitution at nucleotide position 133. This changes the amino acid from a glutamic acid to a stop codon within coding exon 2. In one study, this alteration was observed in 1/3236 cases with invasive epithelial ovarian cancer and 0/3431 controls (Ramus SJ et al. J. Natl. Cancer Inst. 2015 Nov;107). This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). 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. -
Breast and/or ovarian cancer Pathogenic:1
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Ovarian cancer;C1836860:Fanconi anemia complementation group J Pathogenic:1
This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -
Hereditary breast ovarian cancer syndrome Pathogenic:1
Variant summary: BRIP1 c.133G>T (p.Glu45X) 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. The variant allele was found at a frequency of 4e-06 in 251404 control chromosomes. c.133G>T has been reported in the literature in individuals affected with BRIP1 related Breast and/or Ovarian Cancer (example, Ramus_2015). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 26315354). ClinVar contains an entry for this variant (Variation ID: 140808). Based on the evidence outlined above, the variant was classified as pathogenic. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at