rs587779828
Variant summary
Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong
The NM_000051.4(ATM):c.2879C>A(p.Pro960His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000248 in 1,613,956 control chromosomes in the GnomAD database, including 1 homozygotes. 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. P960S) 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 -4 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| ATM | NM_000051.4 | c.2879C>A | p.Pro960His | missense_variant | Exon 19 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00000657 AC: 1AN: 152130Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000119 AC: 3AN: 251428 AF XY: 0.00000736 show subpopulations
GnomAD4 exome AF: 0.0000267 AC: 39AN: 1461826Hom.: 1 Cov.: 32 AF XY: 0.0000261 AC XY: 19AN XY: 727212 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.00000657 AC: 1AN: 152130Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1AN XY: 74322 show subpopulations
ClinVar
Submissions by phenotype
Ataxia-telangiectasia syndrome Uncertain:3
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This sequence change replaces proline, which is neutral and non-polar, with histidine, which is basic and polar, at codon 960 of the ATM protein (p.Pro960His). This variant is present in population databases (rs587779828, gnomAD 0.01%). This missense change has been observed in individual(s) with ATM-related conditions (PMID: 30287823, 35264596, 36243179). ClinVar contains an entry for this variant (Variation ID: 221187). 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. -
Hereditary cancer-predisposing syndrome Uncertain:2
The p.P960H variant (also known as c.2879C>A), located in coding exon 18 of the ATM gene, results from a C to A substitution at nucleotide position 2879. The proline at codon 960 is replaced by histidine, an amino acid with similar properties. This alteration has been reported in unselected breast cancer patients, unselected colorectal cancer patients, as well as unaffected controls in case control studies in Japanese populations (Momozawa Y et al. Nat Commun, 2018 10;9:4083; Fujita M et al. Clin Gastroenterol Hepatol, 2022 Sep;20:2132-2141.e9; Guindalini RSC et al. Sci Rep, 2022 Mar;12:4190). 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. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
This missense variant replaces proline with histidine at codon 960 of the ATM protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in individuals affected with breast cancer and in unaffected individuals in a case-control study in Japanese population (PMID: 30287823). This variant has been identified in 3/251428 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. -
not specified Uncertain:1
Variant summary: ATM c.2879C>A (p.Pro960His) 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 0.00016 in 726040 control chromosomes, predominantly in the East Asian cohort within the gnomAD database, where the variant is underrepresented and in a case control association study of breast cancer in individuals of Japanese ancestry (Momozawa_2018). This frequency is not significantly higher than estimated for a pathogenic variant in ATM causing Ataxia-Telangiectasia (0.00016 vs 0.004), allowing no conclusion about variant significance. c.2879C>A has been reported in Japanese population databases (example, HGVD Kyoto and JMorp) and in the literature in Japanese individuals affected with Breast Cancer as well as in male and female controls (Momozawa_2018, Okawa_2023) with a reported clinical significance as benign. It has also been reported as a VUS in settings of multigene panel testing in individuals with Breast Cancer (example, Guindalini_2022). To our knowledge, c.2879C>A has not been reported in the literature in individuals affected with Ataxia-Telangiectasia. These report(s) do not provide unequivocal conclusions about association of the variant with Ataxia-Telangiectasia/Breast Cancer. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 35264596, 30287823, 36243179). ClinVar contains an entry for this variant (Variation ID: 221187). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Hereditary breast ovarian cancer syndrome Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at