rs772250365
Variant summary
Our verdict is Uncertain significance. The variant received 1 ACMG points: 1P and 0B. PP3
The NM_005732.4(RAD50):c.454A>T(p.Asn152Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000151 in 1,461,554 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N152S) has been classified as Uncertain significance.
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: Uncertain_significance. The variant received 1 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| RAD50 | NM_005732.4 | c.454A>T | p.Asn152Tyr | missense_variant | Exon 4 of 25 | ENST00000378823.8 | NP_005723.2 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 31
GnomAD2 exomes AF: 0.0000239 AC: 6AN: 251392 AF XY: 0.0000368 show subpopulations
GnomAD4 exome AF: 0.0000151 AC: 22AN: 1461554Hom.: 0 Cov.: 31 AF XY: 0.0000193 AC XY: 14AN XY: 727098 show subpopulations
Age Distribution
GnomAD4 genome Cov.: 31
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:2
The p.N152Y variant (also known as c.454A>T), located in coding exon 4 of the RAD50 gene, results from an A to T substitution at nucleotide position 454. The asparagine at codon 152 is replaced by tyrosine, an amino acid with dissimilar properties. This alteration was identified in 1/1824 patients diagnosed with triple negative breast cancer and unselected for family history; this cohort underwent panel testing for 17 cancer predisposition genes (Couch FJ et al. J. Clin. Oncol. 2015 Feb;33:304-11). This variant was also identified in a cohort of 3,579 African males diagnosed with prostate cancer who underwent multi-gene panel testing of 19 DNA repair and cancer predisposition genes (Matejcic M et al. JCO Precis Oncol, 2020 Jan;4:32-43). This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
This sequence change replaces asparagine, which is neutral and polar, with tyrosine, which is neutral and polar, at codon 152 of the RAD50 protein (p.Asn152Tyr). This variant is present in population databases (rs772250365, gnomAD 0.004%). This missense change has been observed in individual(s) with breast cancer (PMID: 25452441). ClinVar contains an entry for this variant (Variation ID: 184750). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt RAD50 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 specified Uncertain:1
Variant summary: RAD50 c.454A>T (p.Asn152Tyr) results in a non-conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change. The variant allele was found at a frequency of 2.4e-05 in 251392 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.454A>T has been observed in individual(s) affected with Breast cancer (Couch_2015). These report(s) do not provide unequivocal conclusions about association of the variant with Nijmegen Breakage Syndrome-Like Disorder. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 25452441). ClinVar contains an entry for this variant (Variation ID: 184750). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Nijmegen breakage syndrome-like disorder Uncertain:1
The RAD50 c.454A>T (p.Asn152Tyr) missense change has a maximum subpopulation frequency of 0.0044% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/). The in silico tool REVEL is inconclusive about a pathogenic or benign effect of this variant on protein function, but this prediction has not been confirmed by functional studies. This variant has been reported in 1 out of 1824 individuals diagnosed with triple-negative breast cancer and unselected for family history (PMID: 25452441). It has been also reported in 5 out of 3579 African males diagnosed with prostate cancer (PMID: 32832836). This variant has not been reported in individuals with RAD50-associated conditions. In summary, the evidence currently available is insufficient to determine the clinical significance of this variant. It has therefore been classified as of uncertain significance. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at