rs578022079
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PP3_Strong
The NM_032043.3(BRIP1):c.2593C>T(p.Arg865Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000266 in 1,613,968 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 Uncertain significance (★★).
Frequency
Consequence
NM_032043.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000394 AC: 6AN: 152116Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000200 AC: 5AN: 250326Hom.: 0 AF XY: 0.00000737 AC XY: 1AN XY: 135686
GnomAD4 exome AF: 0.0000253 AC: 37AN: 1461734Hom.: 0 Cov.: 34 AF XY: 0.0000261 AC XY: 19AN XY: 727166
GnomAD4 genome AF: 0.0000394 AC: 6AN: 152234Hom.: 0 Cov.: 32 AF XY: 0.0000537 AC XY: 4AN XY: 74438
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:3
The p.R865W variant (also known as c.2593C>T), located in coding exon 18 of the BRIP1 gene, results from a C to T substitution at nucleotide position 2593. The arginine at codon 865 is replaced by tryptophan, an amino acid with dissimilar properties. This alteration was identified in 1/1358 non-cancer control individuals and in 0/57 cases, in a study looking at cancer predisposition mutations in patients with cutaneous melanoma and a history of at least two additional non-cutaneous melanoma primary cancers (Pritchard AL et al. PLoS ONE, 2018 Apr;13:e0194098). This alteration has also been identified in 1/976 alleles from a cohort of Dutch melanomaprone families (Potjer TP et al. Int. J. Cancer, 2019 05;144:2453-2464). In one study, the p.R865W alteration was detected in 6/101,759 breast cancer cases and 2/15,587 ovarian cancer cases (Moyer CL et al. Cancer Res. 2020 Feb;80:857-867), and was reported in 5/60,466 breast cancer cases and in 2/53,461 controls in another study (Dorling et al. N Engl J Med 2021 02;384:428-439). This alteration was detected in a cohort of 1663 Brazilian breast cancer patients who underwent hereditary multigene panel testing (Guindalini RSC et al. Sci Rep, 2022 Mar;12:4190). In an inter-strand cross link damage survival assay, the p.R865W alteration was found to be functionally abnormal (Moyer CL et al. Cancer Res. 2020 Feb;80:857-867). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
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This missense variant replaces arginine with tryptophan at codon 865 of the BRIP1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function. A functional study has reported the mutant protein to be defective for repair of interstrand crosslink damage in a BRIP1-/- HeLa cell growth rescue assay (PMID: 31822495). This variant has been reported in an individual with breast cancer (PMID: 29368626) and in an individual with melanoma (PMID: 30414346), as well as in a few individuals unaffected with cancer (PMID: 29368626, 29641532). In one study, this variant was observed in 6/101,759 individuals with breast cancer, in 2/15,587 individuals with ovarian cancer, and in 2/9,884 FLOSSIES individuals (women over age 70 lacking personal history of cancer; PMID: 31822495). In an international breast cancer case-control meta-analysis, this variant was detected in 5/60466 cases and 2/53461 unaffected controls (PMID: 33471991). This variant has been identified in 8/281722 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
not specified Uncertain:2
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Variant summary: BRIP1 c.2593C>T (p.Arg865Trp) results in a non-conservative amino acid change located in the ATP-dependent helicase, C-terminal domain (IPR006555) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 2e-05 in 250326 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.2593C>T has been reported in the literature in individuals affected with breast or ovarian cancer (e.g. Weber-Lassalle_2018, Moyer_2020, de Oliveira_2022). In a recent large study evaluating breast cancer cases and controls in the Breast Cancer Association Consortium (BCAC), the variant was reported in 5/60466 cases, but was also found in 2/53461 controls (Dorling_2021 through LOVD). The variant has also been found in 2/7,325 women of European American ancestry who were over 70 years of age, and never had cancer (FLOSSIES database). In addition, the variant was reported in one individual with melanoma from a melanoma-affected family, but the variant did not co-segregate with disease (Potjer_2018). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. At least one publication reported experimental evidence evaluating an impact on protein function, and demonstrated that the variant protein had a reduced half-life in vitro compared to the wild-type protein and was unable to rescue a BRIP1 null phenotype in an inter-strand cross link damage survival assay (Moyer_2020). The following publications have been ascertained in the context of this evaluation (PMID: 30414346, 29368626, 31822495, 33471991, 35534704). ClinVar contains an entry for this variant (Variation ID: 230320). Based on the evidence outlined above, the variant was classified as uncertain significance. -
not provided Uncertain:2
In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Published functional studies suggest a damaging effect: demonstrates inability to rescue growth in cell viability assays (PMID: 31822495); This variant is associated with the following publications: (PMID: 30414346, 29368626, 29641532, 33471991, 35534704, 31822495, 35264596, Ma2019[article]) -
The BRIP1 c.2593C>T (p.Arg865Trp) variant has been reported in individuals with breast/ovarian cancer (PMIDs: 29368626 (2018), 29641532 (2018), 31822495 (2019), 33471991 (2021), 35534704 (2022), 35264596 (2022), see also LOVD (http://databases.lovd.nl/shared)) and melanoma (PMID: 30414346 (2019)). In addition, this variant has been identified in reportedly healthy individuals (PMID: 3471991 (2021), see also LOVD (http://databases.lovd.nl/shared)). A functional study indicated this variant causes reduced protein stability and impaired DNA interstrand cross-link repair in a cell survival assay (PMID: 31822495 (2019)). The frequency of this variant in the general population, 0.000047 (6/128716 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -
Familial cancer of breast Uncertain:2
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This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -
Familial cancer of breast;C1836860:Fanconi anemia complementation group J Uncertain:1
This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 865 of the BRIP1 protein (p.Arg865Trp). This variant is present in population databases (rs578022079, gnomAD 0.005%). This missense change has been observed in individual(s) with breast or ovarian cancer (PMID: 29368626, 31822495, 35534704). ClinVar contains an entry for this variant (Variation ID: 230320). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on BRIP1 protein function. Experimental studies have shown that this missense change affects BRIP1 function (PMID: 31822495). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
BRIP1-related disorder Uncertain:1
The BRIP1 c.2593C>T variant is predicted to result in the amino acid substitution p.Arg865Trp. This variant has been reported in individuals with melanoma, breast cancer, and ovarian cancer (Table 2, Moyer et al. 2019. PubMed ID: 31822495; Table 4, Potjer et al. 2019. PubMed ID: 30414346; Table S3, Weber-Lassalle et al. 2018. PubMed ID; 29368626). It has also been reported in control individuals from several cancer cohort studies (Table S3, Weber-Lassalle et al. 2018. PubMed ID; 29368626; Table S3, Prichard et al. 2018. PubMed ID: 29641532). In vitro experimental studies suggest that this variant may impair protein activity (Table 12, Moyer et al. 2019. PubMed ID: 31822495). This variant is reported in 0.0050% of alleles in individuals of East Asian descent in gnomAD and is interpreted as uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/230320/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
Ovarian neoplasm;C1836860:Fanconi anemia complementation group J Uncertain:1
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Fanconi anemia complementation group J Uncertain:1
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Hereditary breast ovarian cancer syndrome Uncertain:1
According to the ACMG SVI adaptation criteria we chose these criteria: PS3 (supporting pathogenic): Moyer, 2020 (PMID: 31822495): Classified as null allele; impaired protein's ability to repair inter-strand cross link damage in transfected cells (CRISPR-Cas9 gene editing to create isogenic HeLa cell lines lacking BRIP1 protein and/or expressing candidate missense) , PP3 (medium pathogenic): REVEL = 0.804 (thus [0.773, 0.932) as per Pejaver (2022, PMID: 36413997)) -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at