chr5-132579981-G-A
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6
The NM_005732.4(RAD50):c.671G>A(p.Arg224His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00091 in 1,612,824 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts 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. R224C) 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: Likely_benign. The variant received -5 ACMG points.
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt | 
|---|---|---|---|---|---|---|---|---|---|---|
| RAD50 | ENST00000378823.8  | c.671G>A | p.Arg224His | missense_variant | Exon 5 of 25 | 1 | NM_005732.4 | ENSP00000368100.4 | ||
| ENSG00000283782 | ENST00000638452.2  | c.374G>A | p.Arg125His | missense_variant | Exon 7 of 27 | 5 | ENSP00000492349.2 | 
Frequencies
GnomAD3 genomes   AF:  0.000618  AC: 94AN: 152156Hom.:  1  Cov.: 32 show subpopulations 
GnomAD2 exomes  AF:  0.000721  AC: 181AN: 251130 AF XY:  0.000692   show subpopulations 
GnomAD4 exome  AF:  0.000941  AC: 1374AN: 1460668Hom.:  1  Cov.: 31 AF XY:  0.000896  AC XY: 651AN XY: 726740 show subpopulations 
Age Distribution
GnomAD4 genome   AF:  0.000618  AC: 94AN: 152156Hom.:  1  Cov.: 32 AF XY:  0.000659  AC XY: 49AN XY: 74314 show subpopulations 
Age Distribution
ClinVar
Submissions by phenotype
not provided    Uncertain:3 
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In silico analysis suggests that this missense variant does not alter protein structure/function; Observed in individuals with a personal or family history including pancreatic, breast, and/or ovarian cancer (PMID: 26483394, 16385572, 14684699); This variant is associated with the following publications: (PMID: 26209080, 16385572, 20571869, 14684699, 16474176, 24093751, 24894818, 26314886, 33471991, 26517685, 26787654, 26822949, 26483394) -
Hereditary cancer-predisposing syndrome    Benign:3 
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This alteration is classified as 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. -
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not specified    Benign:1 
Variant summary: RAD50 c.671G>A (p.Arg224His) results in a non-conservative amino acid change located in the AAA domain (IPR038729) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.0007 in 395844 control chromosomes in the gnomAD database (v2.1 and v3.1 datasets), including 1 homozygote. The observed variant frequency is approximately 11-fold of the estimated maximal expected allele frequency for a pathogenic variant in RAD50 causing Hereditary Breast and Ovarian Cancer Syndrome phenotype (6.3e-05), strongly suggesting that the variant is benign. The variant, c.671G>A, has been reported in the literature in individuals affected with breast or ovarian cancer, and other tumor phenotypes (e.g. Heikkinen_2003, Tommiska_2006, Damiola_2014, Lhota_2016, Hu_2016, Young_2016). However, in a recent large study evaluating breast cancer cases and controls in the Breast Cancer Association Consortium (BCAC), the variant was reported in 130/60466 cases and 107/53461 controls, suggesting no increased risk association for the variant with the disease (Dorling_2021 through LOVD). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four other clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation, and classified the variant as VUS (n=1), likely benign (n=2) / benign (n=1). Based on the evidence outlined above, the variant was classified as benign. -
RAD50-related disorder    Benign:1 
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Nijmegen breakage syndrome-like disorder    Benign:1 
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Computational scores
Source: 
Splicing
 Find out detailed SpliceAI scores and Pangolin per-transcript scores at