11-108321391-G-T
Variant summary
Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP6
The NM_000051.4(ATM):c.6543G>T(p.Glu2181Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000102 in 1,614,182 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 -1 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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ATM | NM_000051.4 | c.6543G>T | p.Glu2181Asp | missense_variant | Exon 45 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000532 AC: 81AN: 152190Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000151 AC: 38AN: 251444Hom.: 0 AF XY: 0.000103 AC XY: 14AN XY: 135886
GnomAD4 exome AF: 0.0000575 AC: 84AN: 1461874Hom.: 0 Cov.: 31 AF XY: 0.0000440 AC XY: 32AN XY: 727242
GnomAD4 genome AF: 0.000532 AC: 81AN: 152308Hom.: 0 Cov.: 32 AF XY: 0.000537 AC XY: 40AN XY: 74478
ClinVar
Submissions by phenotype
not provided Uncertain:2Benign:1
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In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Observed in individuals with a personal and/or family history of breast cancer (PMID: 20305132, 26976419, 29684080, 31206626, 31871109, 33646313, 35039564, 35264596); This variant is associated with the following publications: (PMID: 30413523, 26976419, 26689913, 21787400, 25182519, 20305132, 23555315, 28652578, 32098697, 31871109, 33646313, 35039564, 30447919, 33606809, 29684080, 31206626, 35264596, 23532176, 35534704) -
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not specified Uncertain:1Benign:2
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Variant summary: ATM c.6543G>T (p.Glu2181Asp) results in a conservative amino acid change located in the PIK-related kinase, FAT domain (IPR003151) 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 0.00015 in 251444 control chromosomes (gnomAD), predominantly at a frequency of 0.0022 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 2 fold of the estimated maximal expected allele frequency for a pathogenic variant in ATM causing the Breast Cancer phenotype (0.001), suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. In addition, the variant was found in 8/2559 African American women (allele frequency: 0.001563) older than 70 years of age, who had no history of cancer (FLOSSIES database). c.6543G>T has also been reported in the literature in individuals affected with Breast Cancer (e.g. Bernstein 2010, Haiman_2013, Tung 2016, Adedokun_2020, George_2021, Sandoval_2021). These reports do not provide unequivocal conclusions about association of the variant with Breast Cancer. Co-occurrences with a pathogenic variant ATM c.3049C>T (p.Gln1017X) has been seen multiple times in our lab, providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Seven ClinVar submitters have assessed the variant since 2014: five have classified the variant as of uncertain significance, and two as likely benign. Some submitters cite overlapping evidence utilized in the context of this evaluation. Based on the evidence outlined above, the variant was classified as benign. -
Hereditary cancer-predisposing syndrome Benign:3
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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. -
Familial cancer of breast Uncertain:1Benign:1
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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]. -
ATM-related disorder Uncertain:1
The ATM c.6543G>T variant is predicted to result in the amino acid substitution p.Glu2181Asp. This variant has been previously reported in individuals with breast cancer (see for example Bernstein et al. 2010. PubMed ID: 20305132, Supplementary Table 2; Tung et al. 2016. PubMed ID: 26976419; Adedokun et al. 2020. PubMed ID: 31871109) and endometrial cancer (Lu et al. 2015. PubMed ID: 26689913, Supplementary Data 12). This variant is reported in 0.20% of alleles in individuals of African descent in gnomAD, an allele frequency that is likely too high for a disease causing variant. In ClinVar, this variant has conflicting interpretations regarding its pathogenicity, ranging from benign to uncertain significance (https://www.ncbi.nlm.nih.gov/clinvar/variation/127425/). Although we suspect this variant may be benign, at this time its clinical significance is uncertain due to the absence of conclusive functional and genetic evidence. -
Hereditary breast ovarian cancer syndrome Uncertain:1
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Ataxia-telangiectasia syndrome Benign:1
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Hereditary cancer Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at