rs199915459
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6
The NM_000051.4(ATM):āc.7740A>Cā(p.Arg2580Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000083 in 1,614,098 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/23 in silico tools predict 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. R2580K) has been classified as Uncertain significance.
Frequency
Consequence
NM_000051.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Our verdict: Likely_benign. The variant received -5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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ATM | NM_000051.4 | c.7740A>C | p.Arg2580Ser | missense_variant | Exon 52 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000296 AC: 45AN: 152224Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000637 AC: 16AN: 251122 AF XY: 0.0000737 show subpopulations
GnomAD4 exome AF: 0.0000609 AC: 89AN: 1461756Hom.: 0 Cov.: 31 AF XY: 0.0000605 AC XY: 44AN XY: 727174 show subpopulations
GnomAD4 genome AF: 0.000295 AC: 45AN: 152342Hom.: 0 Cov.: 32 AF XY: 0.000295 AC XY: 22AN XY: 74490 show subpopulations
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:3Benign:2
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. -
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not provided Uncertain:4
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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. -
The ATM c.7740A>C (p.Arg2580Ser) variant has been reported in the published literature in individuals affected with breast cancer (PMIDs: 35534704 (2022), 35264596 (2022), 32936981 (2021), 32658311 (2021), 32039725 (2020), 31159747 (2019), 31780696 (2019), 26976419 (2016)), ovarian cancer (PMID: 26689913 (2015)), and prostate cancer (PMID: 31214711 (2020)). Additionally, this variant has been observed in reportedly healthy individuals (PMID: 32658311 (2021), 28652578 (2017)). The frequency of this variant in the general population, 0.00023 (8/35436 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 benign. Based on the available information, we are unable to determine the clinical significance of this variant. -
This variant is denoted ATM c.7740A>C at the cDNA level, p.Arg2580Ser (R2580S) at the protein level, and results in the change of an Arginine to a Serine (AGA>AGC). This variant has been observed in individuals with breast or ovarian cancer (Lu 2015, Tung 2016). ATM Arg2580Ser was observed at an allele frequency of 0.03% (11/34,414) in individuals of Latino ancestry in large population cohorts (Lek 2016). This variant is not located in a known functional domain. In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function. Based on currently available evidence, it is unclear whether ATM Arg2580Ser is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -
Ataxia-telangiectasia syndrome Uncertain:1Benign:1
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not specified Uncertain:1
Variant summary: ATM c.7740A>C (p.Arg2580Ser) results in a non-conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change. The variant allele was found at a frequency of 8.3e-05 in 1614098 control chromosomes, predominantly at a frequency of 0.0009 within the Latino subpopulation in the gnomAD database. This frequency is not significantly higher than estimated for a pathogenic variant in ATM causing Breast Cancer (8.3e-05 vs 0.001), allowing no conclusion about variant significance. c.7740A>C has been reported in the literature in individuals affected with breast cancer, ovarian cancer and Chronic Lymphocytic Leukemia patients (Tung_2016, Lu_2015, Tiao_2017, Dutil_2019, Tsaousis_2019, Da Costa_2020). These report(s) 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: 26689913, 26787654, 26976419, 28652578, 31159747, 32039725, 31780696). ClinVar contains an entry for this variant (Variation ID: 127448). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Ovarian cancer Benign:1
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ATM-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). -
Familial cancer of breast Benign:1
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]. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at