rs1064794095
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_032043.3(BRIP1):c.1850T>C(p.Leu617Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,610,748 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: 0.00000657 AC: 1AN: 152210Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251448Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135910
GnomAD4 exome AF: 0.00000137 AC: 2AN: 1458420Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1AN XY: 725734
GnomAD4 genome AF: 0.00000656 AC: 1AN: 152328Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74490
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:2
The p.L617S variant (also known as c.1850T>C), located in coding exon 12 of the BRIP1 gene, results from a T to C substitution at nucleotide position 1850. The leucine at codon 617 is replaced by serine, an amino acid with dissimilar properties. In one study, this alteration was observed in 0/706 cases with ovarian cancer, 0/6341 cases with breast cancer, and 1/36687 controls (Weber-Lassalle N et al. Breast Cancer Res., 2018 01;20:7). 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. -
This missense variant replaces leucine with serine at codon 617 of the BRIP1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. In a study of 6341 patients affected with breast cancer, 706 patients affected with ovarian cancer, and 2189 geographically matched female controls, this variant reported in 1 control individual but was absent in patients affected with cancer (PMID:29368626). This variant has been identified in 1/251448 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
DNA sequence analysis of the BRIP1 gene demonstrated a sequence change, c.1850T>C, in exon 13 that results in an amino acid change, p.Leu617Ser. This sequence change has been described in the gnomAD database with a frequency of 0.0009% in European populations (dbSNP rs1064794095). The p.Leu617Ser change affects a highly conserved amino acid residue located in a domain of the BRIP1 protein that is known to be functional. The p.Leu617Ser substitution appears to be deleterious using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This c.1850T>C sequence change has not been reported in the literature in individuals with BRIP1-related disorders. Due to the lack of sufficient data, the clinical significance of the p.Leu617Ser change remains unknown at this time. -
Familial cancer of breast;C1836860:Fanconi anemia complementation group J Uncertain:1
This sequence change replaces leucine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 617 of the BRIP1 protein (p.Leu617Ser). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with BRIP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 419768). 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 expected to disrupt BRIP1 protein function with a positive predictive value of 80%. 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. -
not provided Uncertain:1
This variant is denoted BRIP1 c.1850T>C at the cDNA level, p.Leu617Ser (L617S) at the protein level, and results in the change of a Leucine to a Serine (TTA>TCA). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. BRIP1 Leu617Ser was not observed in large population cohorts (NHLBI Exome Sequencing Project, The 1000 Genomes Consortium 2015, Lek 2016). Since Leucine and Serine differ in polarity, charge, size or other properties, this is considered a non-conservative amino acid substitution. BRIP1 Leu617Ser occurs at a position that is conserved across species and is located within the helicase domain III (Cantor 2011). Based on currently available evidence, it is unclear whether BRIP1 Leu617Ser is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at