rs369903995
Variant summary
Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6
The NM_000051.4(ATM):c.4402G>A(p.Val1468Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000508 in 1,613,300 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. 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 -5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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ATM | NM_000051.4 | c.4402G>A | p.Val1468Ile | missense_variant | Exon 29 of 63 | ENST00000675843.1 | NP_000042.3 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000283 AC: 43AN: 152144Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000837 AC: 21AN: 250942Hom.: 0 AF XY: 0.0000442 AC XY: 6AN XY: 135648
GnomAD4 exome AF: 0.0000267 AC: 39AN: 1461038Hom.: 0 Cov.: 31 AF XY: 0.0000234 AC XY: 17AN XY: 726834
GnomAD4 genome AF: 0.000282 AC: 43AN: 152262Hom.: 0 Cov.: 32 AF XY: 0.000269 AC XY: 20AN XY: 74452
ClinVar
Submissions by phenotype
Ataxia-telangiectasia syndrome Uncertain:3Benign:1
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This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -
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not provided Uncertain:3
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In silico analysis indicates that this missense variant does not alter protein structure/function; Observed in individuals with colorectal, prostate, breast, and thyroid cancer (PMID: 27978560, 29684080, 35666082); Observed in an apparently homozygous state in a patient with chorea and neurodevelopmental delays referred for genetic testing at GeneDx; This variant is associated with the following publications: (PMID: 24728327, 28873162, 29684080, 36167400, 27978560, 35666082, 39854657) -
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Hereditary cancer-predisposing syndrome Uncertain:1Benign:2
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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. -
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not specified Uncertain:1Benign:1Other:1
Variant summary: ATM c.4402G>A (p.Val1468Ile) results in a 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 0.0001 in 270710 control chromosomes, predominantly at a frequency of 0.0008 within the African or African-American subpopulation in the gnomAD database. Another database, FLOSSIES, that contains unaffected individuals older than 70 years of age, observed the variant in 6/2559 African Americans, combining this data with the gnomAD occurrences could suggest the variant is a benign polymorphism found in populations of African origin. c.4402G>A has been reported in the literature in individuals affected with Prostate Cancer (Pearlman_2016, Giri_2022) including in one individual of African-American descent (Giri_2022). These reports do not provide unequivocal conclusions about association of the variant with 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: 27978560, 35666082, 36167400). ClinVar contains an entry for this variant (Variation ID: 127389). Based on the evidence outlined above, the variant was classified as VUS-possibly benign. -
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Classification criteria: BS1+BP4 -
Familial cancer of breast Uncertain:1Benign:1
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]. -
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ATM-related cancer predisposition Uncertain:1
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Hereditary breast ovarian cancer syndrome Uncertain:1
This sequence variant is a single nucleotide substitution (G>A) that results in a valine to isoleucine amino acid change at residue 1468 in the ATM protein. This is a previously reported, rare variant in control population datasets (gnomAD database, 28/276692 alleles, 0 homozygotes, 0.01% overall frequency) and has been observed in a single colon cancer patient (PMID 27978560), but no published breast cancer cases, to our knowledge. The Val1468 residue is not located in a domain known to be critical for ATM function, and studies adequately assessing the effect of this variant on protein function have not been identified. The Val1468 residue is highly evolutionarily conserved among mammalian species examined. Bioinformatic tools queried are in disagreement with whether this amino acid change would be damaging. There are multiple entries in ClinVar for this variant, all of which assert a clinical significance that is uncertain. Based upon the evidence, we are in agreement that the clinical significance of this variant is uncertain. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at