rs794726988
Variant summary
Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_ModeratePM2
The NM_002878.4(RAD51D):c.955C>T(p.Gln319*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,613,584 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 (★★). Synonymous variant affecting the same amino acid position (i.e. Q319Q) has been classified as Likely benign.
Frequency
Consequence
NM_002878.4 stop_gained
Scores
Clinical Significance
Conservation
Publications
- breast-ovarian cancer, familial, susceptibility to, 4Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
- hereditary breast ovarian cancer syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- hereditary breast carcinomaInheritance: AD Classification: LIMITED Submitted by: ClinGen
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ACMG classification
Our verdict: Uncertain_significance. The variant received 4 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00000657 AC: 1AN: 152186Hom.: 0 Cov.: 32 show subpopulations
GnomAD4 exome AF: 0.00000274 AC: 4AN: 1461398Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3AN XY: 727050 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.00000657 AC: 1AN: 152186Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 74332 show subpopulations
ClinVar
Submissions by phenotype
not provided Uncertain:3
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Nonsense variant predicted to result in protein truncation as the last 10 amino acids are lost, although loss-of-function variants have not been reported downstream of this position in the protein; Deleted residues part of the critical RAD51C binding region of the ATPase domain (Miller 2004, Gruver 2009, Kim 2011); Has not been previously published as pathogenic or benign to our knowledge; Not observed at significant frequency in large population cohorts (Lek 2016); This variant is associated with the following publications: (PMID: 19327148, 14704354, 21111057) -
The RAD51D c.955C>T (p.Gln319*) variant is predicted to cause the premature termination of RAD51D protein synthesis. This excludes the last ten amino acids that may be part of a disordered region that lacks known structure/function (PMID: 37344589 (2023)). It has been reported in the published literature in individuals affected with ovarian cancer (PMID: 26261251 (2015)), high-grade serous carcinoma of the fallopian tube (PMID: 28709830 (2017)), and breast cancer (PMID: 28709830 (2017)). The frequency of this variant in the general population, 0.0000066 (1/152186 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Based on the available information, we are unable to determine the clinical significance of this variant. -
Hereditary cancer-predisposing syndrome Uncertain:2
This variant changes 1 nucleotide in exon 10 of the RAD51D gene, creating a premature translation stop signal in the last coding exon. The mutant transcript is expected to escape nonsense-mediated decay and be expressed as a truncated protein lacking the last ten amino acids of the RAD51D protein. To our knowledge, functional studies have not been performed for this variant nor has this variant been reported in individuals affected with hereditary cancer in the literature. This variant has not been identified 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. -
The p.Q319* variant (also known as c.955C>T), located in coding exon 10 of the RAD51D gene, results from a C to T substitution at nucleotide position 955. This changes the amino acid from a glutamine to a stop codon within coding exon 10. This alteration occurs at the 3' terminus of theRAD51D gene, is not expected to trigger nonsense-mediated mRNAdecay, and only impacts the last 10 amino acids of the protein. The exact functional effect of this alteration is unknown. Based on the available evidence, the clinical significance of this variant remains unclear. -
Breast-ovarian cancer, familial, susceptibility to, 4 Uncertain:2
This sequence change creates a premature translational stop signal (p.Gln319*) in the RAD51D gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 10 amino acid(s) of the RAD51D protein. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RAD51D-related conditions. ClinVar contains an entry for this variant (Variation ID: 193645). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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 specified Uncertain:1
Variant summary: RAD51D c.955C>T (p.Gln319X) results in a premature termination codon and is expected to disrupt the last 10 amino acids of the protein, however is not expected to undergo nonsense-mediated decay. No truncations downstream of this position have been classified as pathogenic by our laboratory. The variant was absent in 251490 control chromosomes. To our knowledge, no occurrence of c.955C>T in individuals affected with Hereditary Breast And Ovarian Cancer Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as VUS. -
Hereditary breast ovarian cancer syndrome Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at