rs778664039
Variant summary
Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1_ModeratePP5_Very_Strong
The NM_032043.3(BRIP1):c.3390_3393delCTAT(p.Tyr1131LeufsTer18) variant causes a frameshift change. The variant allele was found at a frequency of 0.0000149 in 1,613,128 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★).
Frequency
Consequence
NM_032043.3 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 10 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000131 AC: 2AN: 152198Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000360 AC: 9AN: 250266Hom.: 0 AF XY: 0.0000295 AC XY: 4AN XY: 135470
GnomAD4 exome AF: 0.0000157 AC: 23AN: 1460812Hom.: 0 AF XY: 0.0000124 AC XY: 9AN XY: 726744
GnomAD4 genome AF: 0.00000657 AC: 1AN: 152316Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74480
ClinVar
Submissions by phenotype
Familial cancer of breast;C1836860:Fanconi anemia complementation group J Pathogenic:2
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This sequence change creates a premature translational stop signal (p.Tyr1131Leufs*18) in the BRIP1 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 119 amino acid(s) of the BRIP1 protein. This variant is present in population databases (rs778664039, gnomAD 0.007%). This premature translational stop signal has been observed in individual(s) with prostate cancer or breast cancer (PMID: 27701467, 38348036). This variant is also known as p.I1130fs. ClinVar contains an entry for this variant (Variation ID: 229712). This variant disrupts the TopBP1-binding region of the BRIP1 protein, which plays a critical role in RPA chromatin loading and the activation of the replication checkpoint in response to DNA damage (PMID: 20159562, 21127055). While functional studies have not been performed to directly test the effect of this variant on BRIP1 protein function, this suggests that disruption of this region of the protein is causative of disease. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -
Hereditary cancer-predisposing syndrome Pathogenic:2
This variant deletes 4 nucleotides in exon 20 of the BRIP1 gene, creating a frameshift and premature translation stop signal in the last coding exon. This mutant transcript is predicted to escape nonsense-mediated decay and be expressed as a truncated protein with the last 119 amino acids of the protein replaced with 17 novel amino acids. The truncation is expected to disrupt the TopBP1 binding region and an acetylation site in the C-terminus of the BRIP1 protein, which have been reported to play an important role in DNA replication-stress response and maintaining genomic stability (PMID: 20159562, 21127055, 22792074). This variant has been reported in individuals with early-onset breast cancer (Color internal data) and in an individual affected with prostate cancer (PMID: 27701467). This variant has been identified in 9/250266 chromosomes in the general population by the Genome Aggregation Database (gnomAD). Although the exact mechanism by which this variant causes disease is yet to be determined, the available evidence indicates that this variant is likely to disrupt normal BRIP1 protein function. Therefore, this variant is classified as Likely Pathogenic. -
The c.3390_3393delCTAT variant, located in coding exon 19 of the BRIP1 gene, results from a deletion of 4 nucleotides at positions 3390 to 3393, causing a translational frameshift with a predicted alternate stop codon (p.Y1131Lfs*18). This alteration occurs at the 3' terminus of BRIP1, is not expected to trigger nonsense-mediated mRNA decay, and only impacts the last 101 amino acids of the protein. However, premature stop codons are typically deleterious in nature; functional and structural analyses suggest that at least two residues contained in this deleted region (Thr1133 and Lys1249) have functional importance (Leung CC et al. J Biol Chem. 2011 Feb 11;286(6):4292-301; Xie J et al. PLoS Genet. Jul 2012; 8(7): e1002786). Based on the majority of available evidence to date, this variant is likely to be pathogenic. -
Ovarian cancer Pathogenic:1
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Fanconi anemia complementation group J Pathogenic:1
Variant summary: BRIP1 c.3390_3393delCTAT (p.Tyr1131LeufsX18), located in the last exon, results in a premature termination codon, predicted to cause a truncation of the encoded protein. Truncations downstream of this position have not been classified as pathogenic by our laboratory but have been observed in individuals with breast and/or ovarian cancer and early-onset Prostate cancer as reported in the HGMD database. The variant allele was found at a frequency of 3.6e-05 in 250266 control chromosomes. To our knowledge, c.3390_3393delCTAT has not been reported in the literature in individuals affected with Fanconi Anemia Complementation Group J. However, c.3390_3393delCTAT has been reported in the literature in individuals affected with a variety of cancers such as Prostate (example, Hayano_2016); Breast (example, Li_2018, Vasmatzis_2020) and Pancreatic Cancer (example, Emelyanova_2022). Among these ascertained occurrences, it was reported in the germline DNA of an individual with Breast cancer (example Li_2018); as a putative germline variant due to its finding in the normal tissue of a an individual with Pancreatic Cancer (Emelyanova_2022); in settings of comprehensive genomic profiling on a liver biopsy along with other variation such as biallelic inactivation of TP53, CDH1, FOXA1, NIN and other structural rearrangements in which therapies targeting this specific mutation were invalidated over other validated therapies (Vasmatzis_2020). These report(s) do not provide unequivocal conclusions about association of the variant with Fanconi Anemia Complementation Group J. To our knowledge, no variant specific experimental evidence demonstrating an impact on protein function has been reported however another residue within this region (Threonine 1133) has been reported to be functionally relevant to BRIP1 function. The following publications have been ascertained in the context of this evaluation (PMID: 35309086, 27701467, 30385609, 31685261, 29368626). Seven submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Multiple submitters reported the variant with conflicting assessments (Likely pathogenic, n=5; VUS, n=2). Some submitters cite overlapping evidence utilized in the context of this evaluation. Based on the evidence outlined above, the variant was classified as likely pathogenic for BRIP1 associated cancer predisposition but its association with a phenotype of autosomal recessive Fanconi Anemia Complementation Group J remains uncertain. -
Ovarian neoplasm;C1836860:Fanconi anemia complementation group J Pathogenic:1
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not provided Pathogenic:1
Frameshift variant predicted to result in abnormal protein length as the last 119 amino acids are replaced with 17 different amino acids, and other similar variants have been reported in HGMD; Observed in individuals with breast, prostate or pancreatic cancer (PMID: 27701467, 30385609, 35309086); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 22980975, 27701467, 29368626, 31685261, 30254378, 20159562, 21127055, 29420467, 29922827, 35309086, 30385609) -
Familial cancer of breast Pathogenic:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at