rs147122522
Variant summary
Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate
The NM_000051.4(ATM):c.2689T>A(p.Phe897Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000353 in 1,613,938 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F897S) 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
Genome browser will be placed here
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.2689T>A | p.Phe897Ile | missense_variant | Exon 18 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| ATM | ENST00000675843.1 | c.2689T>A | p.Phe897Ile | missense_variant | Exon 18 of 63 | NM_000051.4 | ENSP00000501606.1 |
Frequencies
GnomAD3 genomes AF: 0.0000328 AC: 5AN: 152210Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000318 AC: 8AN: 251362 AF XY: 0.0000147 show subpopulations
GnomAD4 exome AF: 0.0000356 AC: 52AN: 1461728Hom.: 0 Cov.: 31 AF XY: 0.0000303 AC XY: 22AN XY: 727156 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000328 AC: 5AN: 152210Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74362 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Ataxia-telangiectasia syndrome Uncertain:4
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. -
This sequence change replaces phenylalanine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 897 of the ATM protein (p.Phe897Ile). This variant is present in population databases (rs147122522, gnomAD 0.006%). This missense change has been observed in individual(s) with breast cancer, gynecological cancer, melanoma, and/or pancreatic cancer (PMID: 28726808, 29371908, 34262154). ClinVar contains an entry for this variant (Variation ID: 188232). 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%. 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.7919C>T (p.Thr2640Ile) missense change has a maximum subpopulation frequency of 0.0062% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/). The in silico tool REVEL predicts a benign effect of this variant on protein function, and to our knowledge functional studies have not been performed. This variant has been identified in individuals with breast and pancreatic cancer (PMID: 28726808, 28779002). Additionally, it has been reported to co-occur with another ATM variant, p.Trp156Ter, in an individual diagnosed with ovarian cancer; however, the phase of these variants was not determined (PMID: 29371908). 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. -
- -
not provided Uncertain:3
Observed in individuals with breast, pancreatic, or ovarian cancer (PMID: 28779002, 28726808, 29371908); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 28726808, 25925381, 29371908, 28779002, 34262154, 35451682) -
- -
- -
Hereditary cancer-predisposing syndrome Uncertain:3
PM2+BP4 -
This missense variant replaces phenylalanine with isoleucine at codon 897 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. In an international breast cancer case-control meta-analysis, this variant was detected in 3/60466 cases and 2/53461 unaffected controls (PMID: 33471991). This variant has also been observed with a second ATM variant in an individual affected with ovarian cancer (PMID: 29371908). This variant has been identified in 8/251362 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.F897I variant (also known as c.2689T>A), located in coding exon 17 of the ATM gene, results from a T to A substitution at nucleotide position 2689. The phenylalanine at codon 897 is replaced by isoleucine, an amino acid with highly similar properties. This alteration has been reported in individuals diagnosed with breast, ovarian, and pancreatic cancer (Chaffee K et al. Genet. Med. 2018 01;20(1):119-127; Decker B et al. J. Med. Genet. 2017 11;54(11):732-741; Dominguez-Valentin M et al. Hered Cancer Clin Pract 2018 Jan;16:4). In one of these individuals, this alteration was found to co-occur with an ATM truncating mutation, p.W156*; however, phase was not determined (Dominguez-Valentin M et al.). This amino acid position is not well 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. -
Familial cancer of breast Uncertain:2
- -
- -
not specified Uncertain:1
Variant summary: ATM c.2689T>A (p.Phe897Ile) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 3.2e-05 in 251362 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.2689T>A has been reported in the literature in individuals affected with pancreatic, breast, and ovarian cancers, as well as melanoma (e.g. Decker_2017, Chaffee_2018 Dominguez-Valentin_2018, Dalmasso_2021), including one case where it was reported as co-occurring with a pathogenic variant (ATM c.468G>A, p.Trp156X; Dominguez-Valentin_2018), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Nine clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and all classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -
Breast and/or ovarian cancer Uncertain:1
- -
ATM-related cancer predisposition Uncertain:1
- -
Ataxia-telangiectasia syndrome;C0346153:Familial cancer of breast Uncertain:1
- -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at