chr17-61784387-A-AT
Variant summary
Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong
The NM_032043.3(BRIP1):c.1510dupA(p.Ile504AsnfsTer7) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,461,194 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. I504I) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_032043.3 frameshift
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.
Variant Effect in Transcripts
ACMG analysis was done for transcript: NM_032043.3. You can select a different transcript below to see updated ACMG assignments.
RefSeq Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| BRIP1 | NM_032043.3 | MANE Select | c.1510dupA | p.Ile504AsnfsTer7 | frameshift | Exon 11 of 20 | NP_114432.2 |
Ensembl Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| BRIP1 | ENST00000259008.7 | TSL:1 MANE Select | c.1510dupA | p.Ile504AsnfsTer7 | frameshift | Exon 11 of 20 | ENSP00000259008.2 | ||
| BRIP1 | ENST00000682453.1 | c.1510dupA | p.Ile504AsnfsTer7 | frameshift | Exon 12 of 21 | ENSP00000506943.1 | |||
| BRIP1 | ENST00000683039.1 | c.1510dupA | p.Ile504AsnfsTer7 | frameshift | Exon 12 of 21 | ENSP00000508303.1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD2 exomes AF: 0.00000398 AC: 1AN: 251366 AF XY: 0.00 show subpopulations
GnomAD4 exome AF: 0.00000616 AC: 9AN: 1461194Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6AN XY: 726976 show subpopulations
Age Distribution
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Pathogenic:3
This variant inserts 1 nucleotide in exon 11 of the BRIP1 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 been identified in 1/251366 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 c.1510dupA pathogenic mutation, located in coding exon 10 of the BRIP1 gene, results from a duplication of A at nucleotide position 1510, causing a translational frameshift with a predicted alternate stop codon (p.I504Nfs*7). This variant has been identified in multiple ovarian cancer cohorts (Koczkowska M et al. Cancers (Basel), 2018 Nov;10; Norquist BM et al. JAMA Oncol, 2016 Apr;2:482-90). 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;C1836860:Fanconi anemia complementation group J Pathogenic:2
This sequence change creates a premature translational stop signal (p.Ile504Asnfs*7) 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). This variant is present in population databases (rs775735278, gnomAD 0.006%). This premature translational stop signal has been observed in individual(s) with ovarian cancer (PMID: 26720728). This variant is also known as c.1510insA. ClinVar contains an entry for this variant (Variation ID: 230237). For these reasons, this variant has been classified as Pathogenic.
not provided Pathogenic:2
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.
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 a significant frequency in large population cohorts (gnomAD); Observed in individuals with personal or family history of BRIP1-related cancers referred for genetic testing at GeneDx and in the published literature (PMID: 32255556, 26720728, 29368626); This variant is associated with the following publications: (PMID: 28888541, 26720728, 29922827, 29368626, 32255556, 35273153, 28828701, 33471991, 30441849, 32231423)
Familial cancer of breast Pathogenic:2
This variant is considered pathogenic. This variant creates a frameshift predicted to result in premature protein truncation.
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.
Fanconi anemia complementation group J Pathogenic:1
Variant summary: BRIP1 c.1510dupA (p.Ile504AsnfsX7) results in a premature termination codon, predicted to cause absence of the protein due to nonsense mediated decay, which is a commonly known mechanism for disease. The variant allele was found at a frequency of 4e-06 in 251366 control chromosomes. c.1510dupA has been reported in the literature in at-least one individual affected with Breast Cancer (e.g. Weber-Lassalle_2018). 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: 29368626). ClinVar contains an entry for this variant (Variation ID: 230237). 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