rs2234997
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1
The NM_000051.4(ATM):c.378T>A(p.Asp126Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0114 in 1,612,140 control chromosomes in the GnomAD database, including 1,546 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).
Frequency
Consequence
NM_000051.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -20 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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ATM | NM_000051.4 | c.378T>A | p.Asp126Glu | missense_variant | Exon 5 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0574 AC: 8734AN: 152182Hom.: 810 Cov.: 32
GnomAD3 exomes AF: 0.0161 AC: 4046AN: 251232Hom.: 342 AF XY: 0.0116 AC XY: 1580AN XY: 135798
GnomAD4 exome AF: 0.00660 AC: 9635AN: 1459840Hom.: 733 Cov.: 30 AF XY: 0.00570 AC XY: 4143AN XY: 726396
GnomAD4 genome AF: 0.0575 AC: 8760AN: 152300Hom.: 813 Cov.: 32 AF XY: 0.0552 AC XY: 4114AN XY: 74490
ClinVar
Submissions by phenotype
not specified Benign:8Other:1
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Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -
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not provided Benign:4
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This variant is associated with the following publications: (PMID: 18502988, 24728327, 27153395, 17333338, 17517479, 22529920, 12552566, 22071889) -
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Ataxia-telangiectasia syndrome Benign:3
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This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
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Hereditary cancer-predisposing syndrome Benign:3
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This alteration is classified as 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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Familial cancer of breast Benign:2
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This variant is considered benign. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance. 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]. -
Breast and/or ovarian cancer Benign:1
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Ataxia-telangiectasia syndrome;C0346153:Familial cancer of breast Benign:1
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Malignant tumor of breast Benign:1
The ATM p.Asp126Glu variant was identified in 15 of 1440 proband chromosomes (frequency: 0.01) from individuals or families with breast cancer (Broeks 2008, Gonzalez-Hormazabal 2008, Mangone 2015, Petereit 2013, Thorstenson 2001) and was present in 1 of 200 control chromosomes (frequency: 0.005) from healthy individuals (Mangone 2015). The variant was also identified in dbSNP (ID: rs2234997) as With other allele, ClinVar (classified as benign by Ambry Genetics, Emory Genetics, Prevention Genetics, Invitae; classified as likely benign by Illumina, IBRMDL, GSLUC), Cosmic (classified as neutral), MutDB (classified as Polymorphism), ATM-LOVD, databases. The variant was not identified in LOVD 3.0, databases. The variant was identified in control databases in 5588 (478 homozygous) of 276988 chromosomes at a frequency of 0.02 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Consortium Feb 27, 2017). The variant was identified in the following populations at a frequency greater than 1%: African in 4785 of 24012 chromosomes (freq: 0.199), Ashkenazi Jewish* in 143 of 10146 chromosomes (freq: 0.014), Latino in 396 of 34384 chromosomes (freq: 0.012), Other in 71 of 6456 chromosomes (freq: 0.011). The p.Asp126 residue is conserved in in mammals but not in more distantly related organisms however computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and 1 of 5 in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) predict a greater than 10% difference in splicing; this is not very predictive of pathogenicity. The variant is located with the Telomere-length maintenance and DNA damage repair functional domain increasing the likelihood that it may have clinical significance. ATM D126E genotypes, had a mild effect on survival, but the differences did not reach the level of statistical significance (Li 2006). In addition, the variant lead to decreased DDR response and efficiency, which is associated with increased risk of developing lung cancer in African American women (Wallace 2014). In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -
Hereditary breast ovarian cancer syndrome Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at