rs730881313
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_000051.4(ATM):c.6671T>C(p.Met2224Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,584 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_000051.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
ATM | NM_000051.4 | c.6671T>C | p.Met2224Thr | missense_variant | Exon 46 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 30
GnomAD3 exomes AF: 0.00000796 AC: 2AN: 251176Hom.: 0 AF XY: 0.0000147 AC XY: 2AN XY: 135754
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461584Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2AN XY: 727102
GnomAD4 genome Cov.: 30
ClinVar
Submissions by phenotype
Ataxia-telangiectasia syndrome Uncertain:3
This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 2224 of the ATM protein (p.Met2224Thr). This variant is present in population databases (rs730881313, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with ATM-related conditions. ClinVar contains an entry for this variant (Variation ID: 181884). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -
The ATM c.6671T>C (p.Met2224Thr) missense change has a maximum subpopulation frequency of 0.005% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/). The in silico tool REVEL is inconclusive about a pathogenic or benign effect of this variant on protein function, and to our knowledge functional studies have not been performed. To our knowledge, this variant has not been reported in individuals with ataxia telangiectasia. In summary, the evidence currently available is insufficient to determine the clinical significance of this variant. It has therefore been classified as of uncertain significance. -
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not provided Uncertain:2
This variant is denoted ATM c.6671T>C at the cDNA level, p.Met2224Thr (M2224T) at the protein level, and results in the change of a Methionine to a Threonine (ATG>ACG). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. ATM Met2224Thr was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. Since Methionine and Threonine differ in polarity, charge, size or other properties, this is considered a non-conservative amino acid substitution. ATM Met2224Thr occurs at a position that is well conserved across species and is located within the FAT domain (Tavtigian 2009, UniProt). In silico analyses predict that this variant is probably damaging to protein structure and function. Based on currently available information, it is unclear whether ATM Met2224Thr is pathogenic or benign. We consider it to be a variant of uncertain significance. -
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Hereditary cancer-predisposing syndrome Uncertain:2
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The p.M2224T variant (also known as c.6671T>C), located in coding exon 45 of the ATM gene, results from a T to C substitution at nucleotide position 6671. The methionine at codon 2224 is replaced by threonine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Familial cancer of breast Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at