rs544654228
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2
The NM_002878.4(RAD51D):c.493C>T(p.Arg165Trp) variant causes a missense change. The variant allele was found at a frequency of 0.0000688 in 1,612,350 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R165Q) has been classified as Benign.
Frequency
Consequence
NM_002878.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -4 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
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RAD51D | ENST00000345365.11 | c.493C>T | p.Arg165Trp | missense_variant | Exon 6 of 10 | 1 | NM_002878.4 | ENSP00000338790.6 | ||
ENSG00000267618 | ENST00000593039.5 | c.16C>T | p.Arg6Trp | missense_variant | Exon 2 of 7 | 2 | ENSP00000466834.1 |
Frequencies
GnomAD3 genomes AF: 0.0000526 AC: 8AN: 152202Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000404 AC: 10AN: 247668Hom.: 0 AF XY: 0.0000373 AC XY: 5AN XY: 133870
GnomAD4 exome AF: 0.0000705 AC: 103AN: 1460030Hom.: 0 Cov.: 31 AF XY: 0.0000730 AC XY: 53AN XY: 726106
GnomAD4 genome AF: 0.0000525 AC: 8AN: 152320Hom.: 0 Cov.: 32 AF XY: 0.0000537 AC XY: 4AN XY: 74476
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:5
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This missense variant replaces arginine with tryptophan at codon 165 of the RAD51D protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with breast cancer, together with a pathogenic truncation variant in the ATM gene (PMID: 29371908). This variant has been reported in an unaffected control individual in a breast and ovarian cancer case-control study (PMID: 21822267). This variant has been identified in 13/279074 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. -
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The p.R165W variant (also known as c.493C>T), located in coding exon 6 of the RAD51D gene, results from a C to T substitution at nucleotide position 493. The arginine at codon 165 is replaced by tryptophan, an amino acid with dissimilar properties. This alteration was identified in an individual diagnosed with breast and/or ovarian cancer who previously tested negative for a known familial BRCA1/2 mutation (Dominguez-Valentin M et al. Hered Cancer Clin Pract 2018 Jan;16:4). This amino acid position is poorly 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. -
Breast-ovarian cancer, familial, susceptibility to, 4 Uncertain:3Benign:1
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This variant is considered likely benign. This variant is strongly associated with less severe personal and family histories of cancer, typical for individuals without pathogenic variants in this gene [PMID: 25085752]. -
This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 165 of the RAD51D protein (p.Arg165Trp). This variant is present in population databases (rs544654228, gnomAD 0.01%). This missense change has been observed in individual(s) with RAD51D-related conditions (PMID: 31159747, 34284872). ClinVar contains an entry for this variant (Variation ID: 127891). 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 RAD51D 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. -
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not provided Uncertain:3
The RAD51D c.493C>T (p.Arg165Trp) variant has been reported in the published literature in individuals with breast cancer and a personal and/or family history of breast and/or ovarian cancer (PMID: 29371908 (2018), 31159747 (2019), 33471991 (2021)), see also LOVD (http://databases.lovd.nl/shared/genes/RAD51D). It has also been observed in reportedly healthy individuals (PMIDs: 21822267 (2011), 26261251 (2015), 33471991 (2021)), see also LOVD (http://databases.lovd.nl/shared/genes/RAD51D), 36243179 (2022)). The frequency of this variant in the general population, 0.00012 (3/24306 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 damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -
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In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 26261251, 31159747, 32579932, 29371908, 21822267, 21111057, 14704354, 34284872, 33471991, 36243179) -
not specified Uncertain:2
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Variant summary: RAD51D c.493C>T (p.Arg165Trp) results in a non-conservative amino acid change located in the DNA recombination and repair protein Rad51-like, C-terminal domain; DNA recombination and repair protein RecA-like, ATP-binding domain; AAA+ ATPase domain of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4.6e-05 in 259332 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in RAD51D causing Hereditary Breast And Ovarian Cancer Syndrome (4.6e-05 vs 0.00013), allowing no conclusion about variant significance. c.493C>T has been reported in the literature in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome (Dominguez-Valentin_2018 and Krivokuca_2022). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. Co-occurrences with other pathogenic variant(s) have been reported (ATM c.9139C>T, p.Arg3047Ter), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 21822267, 26261251, 29371908, 34284872). Ten clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and classified as VUS (n=9) and likely pathogenic (n=1). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Lynch syndrome 1 Pathogenic:1
This variant is denoted RAD51D c.493C>T at the DNA level, p.Arg165Trp. The arginine residue is weakly conserved and there is a moderate physicochemical difference between Arginine and Tryptophan. This variant has not been reported in the literature in individuals with RAD51D related disease. It has never been reported so far in Greek population. In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect. We observed this variant in a woman with ovarian cancer at the age of 44 years and her brother with undifferentiated gastric cancer at the age of 43 years. Two other sisters are healthy carriers at the age of 53 and 50 years. There was also ovarian and prostate cancer in second degree family members, from the paternal side. The phenotype in this family was consistent with Lynch Syndrome type II. This inherited syndrome in the above family has apparently a causative relation with RAD51D mutation c.493C>T, which is classified as likely pathogenic. -
Breast and/or ovarian cancer Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at