About ATM
No gene-level summary was recorded for this case.
No variant summary was recorded for this case.
Five-step scale from benign to pathogenic. This variant is pathogenic. Select a step to read what it means.
Pathogenic.A pathogenic classification under the recorded framework.
Gene-level background from the recorded interpretation.
Words with a dotted underline have a short definition. Hover or tap them.No gene-level summary was recorded for this case.
The recorded framework is ClinGen ATM VCEP v1.5.0. The criteria and strengths shown below come from the saved assessment; this page does not recalculate the classification.
The applied criteria and their strengths are shown as assessed under the stated framework.
This is a frameshift deletion (c.1355del) in exon 10 of 63, creating a premature termination codon at p.Thr452AsnfsTer21 with predicted nonsense-mediated decay. Loss of function is an established disease mechanism for ATM (ataxia-telangiectasia, autosomal recessive; cancer susceptibility, autosomal dominant). Under the ATM VCEP v1.5.0 PVS1 Decision Tree, this NMD-prone frameshift variant upstream of p.Arg3047 qualifies for PVS1_VeryStrong.
This frameshift deletion creates a premature termination codon at p.Thr452AsnfsTer21 (codon 472), which is upstream of p.Arg3047, the most C-terminal known pathogenic variant in ATM. Under ATM VCEP v1.5.0, PM5_Supporting is applied to frameshifting or truncating variants with PTCs upstream of p.Arg3047.
Expert panel ClinGen Hereditary Breast, Ovarian and Pancreatic Cancer Variant Curation Expert Panel, ClinGen classified as Pathogenic.
No benign criterion marked as applied in the recorded assessment.
Richards et.al., 2015 - Combining rules v1.5.0 criteria-combination framework: matched Rule4 (1 Pathogenic.Very Strong + Pathogenic.Supporting >=2) with applied criteria: PVS1 very strong, PM5 supporting, PP5 supporting; maps to Pathogenic.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 27 / 1,614,094 alleles. Recorded AF 1.67277e-05. Recorded homozygote count 0.
Absent from gnomAD v2.1.
Recorded SpliceAI maximum delta score: 0.020. Refer to the recorded PP3/BP4 rationale for interpretation.
7 Pathogenic · 1 pathogenic · 1 Likely pathogenic.
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Loss-of-function; curated oncogenicity label: Likely Oncogenic.
This variant has previously been reported in somatic cancers (COSMIC; COSV99069690, n = 1 times).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen ATM VCEP v1.5.0, with the data and sources behind each one.
28 criteria with recorded statuses: 3 met · 5 not met · 5 not assessed · 15 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_000051.4:c.1355del (NP_000042.3:p.Thr452AsnfsTer21) is a frameshift deletion in exon 10 of the ATM gene, creating a premature termination codon at position 472 with predicted nonsense-mediated decay.
PVS1_VeryStrong is applied: the variant is a predicted null allele in a gene where loss of function is an established disease mechanism for ataxia-telangiectasia (autosomal recessive) and cancer susceptibility (autosomal dominant). The PTC is well upstream of p.Arg3047 and the affected exon is constitutive per the ATM VCEP v1.5.0.
PM5_Supporting is applied: the premature termination codon at codon 472 lies upstream of p.Arg3047, the most C-terminal known pathogenic variant in ATM, meeting the VCEP truncation-cutoff rule for PM5_Supporting.
This variant has been reported in ClinVar as Pathogenic by the ClinGen Hereditary Breast, Ovarian and Pancreatic Cancer VCEP (expert panel, reviewed status) and by nine clinical laboratories (8 Pathogenic, 1 Likely pathogenic; ClinVar VariationID 141474).
The variant is extremely rare in population databases: gnomAD v4.1 allele frequency = 0.00167% (27/1,614,094 alleles, 0 homozygotes) and absent from gnomAD v2.1 and gnomAD-Canada v1.0. The grpmax filtering AF of 0.0015% is well below the BA1 (>0.5%) and BS1 (>0.05%) thresholds, confirming the variant is not a common benign polymorphism.
SpliceAI predicts no cryptic splice impact (max delta = 0.02), consistent with the variant exerting its pathogenic effect through protein truncation rather than aberrant splicing.
The variant has been observed in somatic cancers (COSMIC COSV99069690, n=1), consistent with its role as a loss-of-function allele in ATM-related tumorigenesis.
Under the ATM VCEP v1.5.0 combination rules (Richards et al. 2015), the criteria met are PVS1_VeryStrong and PM5_Supporting (1 Pathogenic Very Strong + 1 Pathogenic Supporting). No formal combination rule in the VCEP framework maps exactly to this criterion set; the closest rule (Rule 10: 1 PVS + 1 PM) reaches Likely Pathogenic but requires a Pathogenic Moderate criterion which is not met. However, the ClinGen HBOP VCEP has independently classified this variant as Pathogenic based on their full evidentiary review including proband-level PM3/BP2 data not available in this assessment.
Limitations of this assessment: (a) all five full-text publications retrieved were non-viable (Sci-Hub landing pages without paper content), preventing verification of variant-specific proband counts, segregation data, or functional assay results; (b) PM3 proband-level data referenced by the VCEP expert panel was not available for independent adjudication; (c) PS3/BS3 functional assay results could not be verified.
No criteria match.
No further detail was recorded.
Every interpreted variant in ATM, mapped onto the exon structure of NM_000051.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| European (non-Finnish)26 / 1,180,034 | 2.2e-05 |
| Remaining individuals1 / 62,508 | 1.6e-05 |
This variant is present in gnomAD v4.1 (AF= 1.67277e-05; MAF= 0.00167%, 27/1614094 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 2.20333e-05; MAF= 0.00220%, 26/1180034 alleles, homozygotes = 0); grpmax FAF= 1.533e-05.
Absent from gnomAD v2.1.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.02).
9 paper records listed. No publication is explicitly linked to an applied criterion in the recorded metadata. None of the listed paper records explicitly indicates that the variant is named.
Screenshots represent source records captured during evidence collection. Select one to view the recorded source content.
The evidence statements recorded by the interpretation pipeline. They have not been reinterpreted by the page.
This variant is present in gnomAD v4.1 (AF= 1.67277e-05; MAF= 0.00167%, 27/1614094 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 2.20333e-05; MAF= 0.00220%, 26/1180034 alleles, homozygotes = 0); grpmax FAF= 1.533e-05.
Absent from gnomAD v2.1.
This variant has been reported in ClinVar as Pathogenic (7 clinical laboratories) and as pathogenic (1 clinical laboratory) and as Likely pathogenic (1 clinical laboratory) and as Pathogenic by ClinGen Hereditary Breast, Ovarian and Pancreatic Cancer Variant Curation Expert Panel, ClinGen (expert panel). (ClinVarID = 141474)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.02).
OncoKB identified variant-specific curated literature and context relevant to functional review; biological-effect context: Likely Loss-of-function; curated oncogenicity label: Likely Oncogenic.
This variant does not lie in a statistically significant hotspot. This variant has previously been reported in somatic cancers (COSMIC; COSV99069690, n = 1 times).
This variant does not lie in a statistically significant hotspot.