rs786202778
Variant summary
Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6
The NM_000051.4(ATM):c.712A>G(p.Ile238Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000167 in 1,613,786 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000051.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
ATM | NM_000051.4 | c.712A>G | p.Ile238Val | missense_variant | Exon 7 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00000657 AC: 1AN: 152172Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.0000159 AC: 4AN: 251040Hom.: 0 AF XY: 0.0000221 AC XY: 3AN XY: 135682
GnomAD4 exome AF: 0.0000178 AC: 26AN: 1461614Hom.: 0 Cov.: 32 AF XY: 0.0000193 AC XY: 14AN XY: 727110
GnomAD4 genome AF: 0.00000657 AC: 1AN: 152172Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 74350
ClinVar
Submissions by phenotype
not provided Uncertain:5
Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Observed in individuals with melanoma, breast, ovarian, or colon cancer, and also in controls (PMID: 26689913, 27978560, 30287823, 34262154); This variant is associated with the following publications: (PMID: 26689913, 30287823, 27978560, 33471991, 34262154, 36243179) -
The ATM c.712A>G; p.Ile238Val variant (rs754275014) is reported in the literature in an individual with colorectal cancer (Pearlman 2017), and individuals with breast cancer but was also reported in healthy controls (Momozawa 2018). This variant is reported in the ClinVar database (Variation ID: 186210). It is found in the general population with an overall allele frequency of 0.002% (4/251040 alleles) in the Genome Aggregation Database. The isoleucine at codon 238 is moderately conserved, but computational analyses (SIFT, PolyPhen-2) predict that this variant is tolerated. Due to limited information, the clinical significance of this variant is uncertain at this time. REFERENCES Momozawa Y et al. Germline pathogenic variants of 11 breast cancer genes in 7,051 Japanese patients and 11,241 controls. Nat Commun. 2018 Oct 4;9(1):4083. Pearlman R et al. Prevalence and Spectrum of Germline Cancer Susceptibility Gene Mutations Among Patients With Early-Onset Colorectal Cancer. JAMA Oncol. 2017 Apr 1;3(4):464-471. -
Available data are insufficient to determine the clinical significance of the variant at this time. The frequency of this variant in the general population is uninformative in assessment of its pathogenicity. (http://gnomad.broadinstitute.org) Computational tools predict that this variant is not damaging. -
BP4 -
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Familial cancer of breast Uncertain:2Benign:1
This variant was classified as: Uncertain significance. The available evidence on this variant's pathogenicity is insufficient or conflicting. The following ACMG criteria were applied in classifying this variant: PM2,BP4. -
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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]. -
Hereditary cancer-predisposing syndrome Uncertain:2Benign:1
This alteration is classified as likely 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. -
This missense variant replaces isoleucine with valine at codon 238 of the ATM protein. Computational prediction suggests that this variant may not impact protein structure and function. To our knowledge, functional studies have not been reported for this variant. This variant has been reported in individuals affected with breast cancer, ovarian cancer, or colorectal cancer (PMID: 26689913, 27978560, 30287823, 33471991). This variant has been identified in 4/251040 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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Ataxia-telangiectasia syndrome Uncertain:2
This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 238 of the ATM protein (p.Ile238Val). This variant is present in population databases (rs754275014, gnomAD 0.003%). This missense change has been observed in individual(s) with colorectal cancer, breast cancer, and ovarian cancer (PMID: 26689913, 27978560, 30287823). ClinVar contains an entry for this variant (Variation ID: 186210). 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 ATM protein function with a negative predictive value of 95%. 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: ATM c.712A>G (p.Ile238Val) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 1.7e-05 in 1606794 control chromosomes in the gnomAD database (v4.1 dataset). This frequency is not higher than estimated maximum for a pathogenic variant in ATM causing Breast Cancer (1.7e-05 vs 0.001), allowing no conclusion about variant significance. c.712A>G has been reported in the literature in individuals affected with Breast Cancer, and other tumor phenotypes, but was also found in several controls (e.g. Tung_2014, Pearlman_2017, Momozawa_2018, Dorling_2021, Dalmasso_2021, Okawa_2023). These reports do not provide unequivocal conclusions about association of the variant with Breast Cancer. 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: 27978560, 30287823, 33471991, 34262154, 36243179, 25186627). ClinVar contains an entry for this variant (Variation ID: 186210). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at