rs780932013
Variant summary
Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3PP5
The NM_000051.4(ATM):c.1695A>G(p.Glu565Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000031 in 1,613,850 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000051.4 synonymous
Scores
Clinical Significance
Conservation
Publications
- hereditary breast carcinomaInheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics, ClinGen
- ataxia telangiectasiaInheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P, ClinGen, Laboratory for Molecular Medicine, Orphanet
- hereditary nonpolyposis colon cancerInheritance: AD Classification: MODERATE, LIMITED Submitted by: ClinGen, Ambry Genetics
- prostate cancerInheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
- sarcomaInheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
- familial ovarian cancerInheritance: AD Classification: LIMITED Submitted by: ClinGen
- gastric carcinomaInheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
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ACMG classification
Our verdict: Uncertain_significance. The variant received 4 ACMG points.
Variant Effect in Transcripts
ACMG analysis was done for transcript: NM_000051.4. You can select a different transcript below to see updated ACMG assignments.
RefSeq Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| ATM | NM_000051.4 | MANE Select | c.1695A>G | p.Glu565Glu | synonymous | Exon 11 of 63 | NP_000042.3 | ||
| ATM | NM_001351834.2 | c.1695A>G | p.Glu565Glu | synonymous | Exon 12 of 64 | NP_001338763.1 |
Ensembl Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| ATM | ENST00000675843.1 | MANE Select | c.1695A>G | p.Glu565Glu | synonymous | Exon 11 of 63 | ENSP00000501606.1 | ||
| ATM | ENST00000452508.7 | TSL:1 | c.1695A>G | p.Glu565Glu | synonymous | Exon 12 of 64 | ENSP00000388058.2 | ||
| ATM | ENST00000531525.3 | TSL:1 | c.1695A>G | p.Glu565Glu | synonymous | Exon 11 of 30 | ENSP00000434327.3 |
Frequencies
GnomAD3 genomes AF: 0.0000131 AC: 2AN: 152238Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00000796 AC: 2AN: 251276 AF XY: 0.0000147 show subpopulations
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461612Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2AN XY: 727106 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000131 AC: 2AN: 152238Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74368 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Pathogenic:1Uncertain:3
PVS1_O_Moderate, BP7 c.1695A>G, located in exon 11 of the ATM gene, is predicted to result in no amino acid change, p.(Glu565=) (BP7). This variant is found in 3/268144 alleles at a frequency of 0.0011% in the gnomAD v2.1.1 database, non-cancer dataset. The SpliceAI algorithm predicts the strengthening of a novel splice donor site at position 1695 (deltascore: 0.69). RNA analysis performed by LabCorp indicates that this variant induces altered splicing and may result in an absent or disrupted protein due to an out of frame product, r.1696_1802del (p.Val566*) that is predicted to undergo nonsense mediated decay (PVS1_O_Moderate).�To our knowledge, relevant clinical data have not been reported for this variant. It has been reported in ClinVar (5x LP, 3x VUS, 1x P). Based on the currently available information, c.1695A>G is classified as an uncertain significance variant according to ClinGen-ATM Guidelines version 1.1.
This variant causes an A to G nucleotide substitution at the 1695 position of the ATM gene. Splice site prediction tools suggest that this variant may impact RNA splicing. This variant has been reported to impact RNA splicing by an external laboratory, however, detailed data are not available for review (ClinVar SCV000547136.8, SCV000660618.4). This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has been identified in 3/282680 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.
The c.1695A>G variant (also known as p.E565E), located in coding exon 10 of the ATM gene, results from an A to G substitution at nucleotide position 1695. This nucleotide substitution does not change the amino acid at codon 565. In silico splice site analysis predicts that this alteration will result in the creation or strengthening of a novel splice donor site. RNA studies have demonstrated that this alteration results in abnormal splicing in the set of samples tested (Ambry internal data). Based on the majority of available evidence to date, this variant is likely to be pathogenic.
Familial cancer of breast Pathogenic:2Uncertain:1
This variant is considered likely pathogenic. mRNA analysis has demonstrated abnormal mRNA splicing occurs [Myriad internal data].
Ataxia-telangiectasia syndrome Pathogenic:2
Variant summary: ATM c.1695A>G alters a non-conserved nucleotide resulting in a synonymous change. Several computational tools predict a significant impact on normal splicing: four predict the variant strengthens a cryptic 5' donor site. Internal data on RNA analysis indicates that this variant induces altered splicing and may result in an absent or disrupted protein due to an out of frame product, r.1696_1802del (p.Val566*) that is predicted to undergo nonsense mediated decay (NMD) (Internal data). The variant allele was found at a frequency of 8e-06 in 251276 control chromosomes (gnomAD v2.1), including two carriers who were above age 75 year and were also part of the non-cancer datasets (gnomAD v2.1 and v3.1). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.1695A>G in individuals affected with Ataxia-Telangiectasia (or other ATM-related phenotypes) have been reported. ClinVar contains an entry for this variant (Variation ID: 407723), and at-least two ClinVar submitters reported abnormal splicing in the set of samples tested (Ambry and our partner laboratory Labcorp Genetics, formerly Invitae internal data). Based on the evidence outlined above, the variant was classified as likely pathogenic Autosomal Recessive Ataxia-Telangiectasia and Autosomal Dominant susceptibility to Breast Cancer.
This sequence change affects codon 565 of the ATM mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the ATM protein. RNA analysis indicates that this variant induces altered splicing and may result in an absent or altered protein product. This variant is present in population databases (rs780932013, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with ATM-related conditions. ClinVar contains an entry for this variant (Variation ID: 407723). Studies have shown that this variant results in activation of a cryptic splice site, and produces a non-functional protein and/or introduces a premature termination codon (external communication, internal data). For these reasons, this variant has been classified as Pathogenic.
Ataxia-telangiectasia syndrome;C0346153:Familial cancer of breast Pathogenic:1
not provided Pathogenic:1
Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports a deleterious effect on splicing; Has not been previously published as pathogenic or benign to our knowledge
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at