rs150143957
Variant summary
Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate
The NM_000051.4(ATM):āc.131A>Gā(p.Asp44Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000378 in 1,613,612 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). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D44Y) has been classified as Uncertain significance.
Frequency
Consequence
NM_000051.4 missense
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: Likely_benign. The variant received -2 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| ATM | NM_000051.4 | c.131A>G | p.Asp44Gly | missense_variant | Exon 3 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000191 AC: 29AN: 152164Hom.: 0 Cov.: 33 show subpopulations
GnomAD2 exomes AF: 0.0000279 AC: 7AN: 251200 AF XY: 0.0000147 show subpopulations
GnomAD4 exome AF: 0.0000205 AC: 30AN: 1461330Hom.: 0 Cov.: 32 AF XY: 0.0000138 AC XY: 10AN XY: 726934 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000204 AC: 31AN: 152282Hom.: 0 Cov.: 33 AF XY: 0.000175 AC XY: 13AN XY: 74464 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Ataxia-telangiectasia syndrome Uncertain:5
This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -
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This sequence change replaces aspartic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 44 of the ATM protein (p.Asp44Gly). This variant is present in population databases (rs150143957, gnomAD 0.05%). This missense change has been observed in individual(s) with breast cancer (PMID: 25186627, 31871109, 35039564, 35534704, 35980532, 36315513). ClinVar contains an entry for this variant (Variation ID: 186471). 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%. RNA analysis performed to evaluate the impact of this missense change on mRNA splicing indicates it does not significantly alter splicing (internal data). 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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Hereditary cancer-predisposing syndrome Uncertain:3
This missense variant replaces aspartic acid with glycine at codon 44 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 (PMID: 31871109, 32959997, 33471991, 35039564, 36315513) and prostate cancer (PMID: 36898365). This variant has been identified in 11/282598 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 p.D44G variant (also known as c.131A>G), located in coding exon 2 of the ATM gene, results from an A to G substitution at nucleotide position 131. The aspartic acid at codon 44 is replaced by glycine, an amino acid with similar properties. In a study of 196 women with breast cancer and 185 unaffected controls from Cameroon and Uganda, this variant was observed in eight women (Adedokun B et al. Cancer Epidemiol Biomarkers Prev, 2020 02;29:359-367). This alteration has been identified in multiple individuals diagnosed with breast cancer (Haiman CA et al. PLoS Genet, 2013 Mar;9:e1003419; Tung N et al. Cancer, 2015 Jan;121:25-33; Uyisenga JP et al. Mol Genet Genomic Med, 2020 11;8:e1500; Eygelaar D et al. Sci Rep, 2022 Jan;12:802; McDonald JT et al. PLoS One, 2022 Oct;17:e0273835). This alteration has also been identified in multiple individuals diagnosed with prostate cancer (Matejcic M et al. JCO Precis Oncol, 2020 Jan;4:32-43; Gheybi K et al. J Natl Compr Canc Netw, 2023 Mar;21:289-296.e3). This amino acid position is highly 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. -
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Familial cancer of breast Uncertain:2Benign: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]. -
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not specified Uncertain:2
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Variant summary: ATM c.131A>G (p.Asp44Gly) results in a non-conservative amino acid change located in the Telomere-length maintenance and DNA damage repair domain (IPR021668) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00019 in 143258 control chromosomes, predominantly at a frequency of 0.0006 within the African or African-American subpopulation in the gnomAD database (v3 genomes dataset). This frequency is somewhat lower than the maximum expected for a pathogenic variant in ATM causing Breast Cancer (0.0006 vs 0.001), allowing no conclusion about variant significance. In addition, this variant has been reported in 2/2559 African American women and 1/7325 European American women, who were older than age 70 and cancer free (in the FLOSSIES database). The variant, c.131A>G, has also been reported in the literature in African- or African-American individuals affected with Breast Cancer (Haiman_2013, Tung_2015, Adedokun_2020). These reports however 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. Six other clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014, and all of them classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -
not provided Uncertain:1
In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Observed in individuals with a personal or family history of breast or prostate cancer (PMID: 23555315, 25186627, 32959997, 35039564, 36315513, 36898365, 35534704, 35980532); This variant is associated with the following publications: (PMID: 25186627, 32959997, 35039564, 31871109, 23555315, 36315513, 36898365, 35534704, 35980532, 32832836) -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at