rs150813402
Variant summary
Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong
The NM_032043.3(BRIP1):c.3236T>C(p.Ile1079Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000991 in 1,614,176 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I1079M) has been classified as Uncertain significance.
Frequency
Consequence
NM_032043.3 missense
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: Likely_benign. The variant received -4 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152190Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00000796 AC: 2AN: 251272 AF XY: 0.00 show subpopulations
GnomAD4 exome AF: 0.00000889 AC: 13AN: 1461868Hom.: 0 Cov.: 34 AF XY: 0.00000963 AC XY: 7AN XY: 727236 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000197 AC: 3AN: 152308Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74494 show subpopulations
ClinVar
Submissions by phenotype
not provided Uncertain:2
Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 33471991, 26921362) -
The BRIP1 c.3236T>C (p.Ile1079Thr) variant has been reported in individuals with breast cancer (PMID: 26921362 (2016), 33471991 (2021), see also LOVD (http://databases.lovd.nl/shared/genes/BRIP1)). This variant has also been reported in unaffected individuals (PMID: 33471991 (2021), see also LOVD (http://databases.lovd.nl/shared/genes/BRIP1)). The frequency of this variant in the general population, 0.000008 (2/251272 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 benign. Based -
Hereditary cancer-predisposing syndrome Uncertain:1Benign:1
This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
This missense variant replaces isoleucine with threonine at codon 1079 of the BRIP1 protein. Computational prediction suggests that this variant may not impact protein structure and function. To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with breast cancer (PMID: 26921362). This variant has been identified in 2/251272 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:1
Variant summary: BRIP1 c.3236T>C (p.Ile1079Thr) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 7.6e-06 in 261756 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.3236T>C has been reported in the literature in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome (Easton_2016). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. ClinVar contains an entry for this variant (Variation ID: 128185). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Ovarian cancer;C1836860:Fanconi anemia complementation group J Uncertain: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. -
Familial cancer of breast;C1836860:Fanconi anemia complementation group J Uncertain:1
This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 1079 of the BRIP1 protein (p.Ile1079Thr). This variant is present in population databases (rs150813402, gnomAD 0.007%). This missense change has been observed in individual(s) with breast cancer (PMID: 26921362). ClinVar contains an entry for this variant (Variation ID: 128185). 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) indicates that this missense variant is not expected to disrupt BRIP1 protein function with a negative predictive value of 95%. 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.3236T>C variant is predicted to result in the amino acid substitution p.Ile1079Thr. This variant has been reported in an individual with breast cancer (Easton et al. 2016. PubMed ID: 26921362). This variant is reported in 0.0062% of alleles in individuals of African descent in gnomAD and is interpreted as uncertain by most labs in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/128185/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
Inherited ovarian cancer (without breast cancer) Uncertain:1
PM2_Supporting,BP4 -
Familial cancer of breast Uncertain:1
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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at