rs151109830
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4BS2
The NM_005732.4(RAD50):c.265G>A(p.Val89Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00027 in 1,601,974 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. V89V) has been classified as Likely benign.
Frequency
Consequence
NM_005732.4 missense
Scores
Clinical Significance
Conservation
Publications
- Nijmegen breakage syndrome-like disorderInheritance: AR Classification: STRONG, LIMITED Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
- familial ovarian cancerInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
- hereditary breast carcinomaInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Likely_benign. The variant received -5 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| RAD50 | NM_005732.4 | c.265G>A | p.Val89Ile | missense_variant | Exon 3 of 25 | ENST00000378823.8 | NP_005723.2 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000854 AC: 13AN: 152182Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000115 AC: 29AN: 251350 AF XY: 0.0000957 show subpopulations
GnomAD4 exome AF: 0.000290 AC: 420AN: 1449792Hom.: 3 Cov.: 31 AF XY: 0.000267 AC XY: 193AN XY: 721984 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000854 AC: 13AN: 152182Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4AN XY: 74354 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Uncertain:2
RAD50 has been only recently described in association with cancer predisposition and the risks are not well understood. This variant is denoted RAD50 c.265G>A at the cDNA(V89I) at the protein level, and results in the change of a Valine to an Isoleucine (GTC>ATC). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. RAD50 Val89Ile was not observed at significant allele frequency in the NHLBI Exome Sequencing Project. This variant is a conservative substitution of one neutral non-polar amino acid for another, altering a position that is well conserved throughout evolution and is not located in a known functional domain. In silico analyses are inconsistent with regard to the effect this variant may have on protein structure and function. On a molecular level, the impact of this missense variant on protein structure and function is not known and thus we consider this to be a variant of uncertain significance. Furthermore, based on the currently available information, cancer risks associated with this variant, and the RAD50 gene, remain unclear. -
The RAD50 c.265G>A (p.Val89Ile) variant has been reported in in individuals with breast cancer as well as in unaffected controls in a breast cancer association study (PMID: 33471991 (2021), see also LOVD (http://databases.lovd.nl/shared/genes/RAD50)). The frequency of this variant in the general population, 0.0004 (10/25124 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 conflicting predictions that this variant is benign or damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -
Hereditary cancer-predisposing syndrome Uncertain:2
The p.V89I variant (also known as c.265G>A), located in coding exon 3 of the RAD50 gene, results from a G to A substitution at nucleotide position 265. The valine at codon 89 is replaced by isoleucine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -
This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 89 of the RAD50 protein (p.Val89Ile). This variant is present in population databases (rs151109830, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with RAD50-related conditions. ClinVar contains an entry for this variant (Variation ID: 128010). 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 RAD50 protein function with a negative 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. -
Nijmegen breakage syndrome-like disorder Uncertain:2
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at