About CHEK2
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 likely benign. Select a step to read what it means.
Likely benign.A likely benign 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 CHEK2 VCEP v1.0.0. 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.
No pathogenic criterion marked as applied in the recorded assessment.
The gnomAD v4.1 Middle Eastern subpopulation allele frequency of 0.407% exceeds the BS1 threshold of 0.3% for a dominant disorder. This frequency is higher than expected for a pathogenic CHEK2 variant with moderate penetrance, particularly given the presence of a homozygous carrier in the same subpopulation.
Multiple lines of computational evidence suggest a benign effect. BayesDel score 0.096 falls within the benign range. SpliceAI max delta score 0.03 predicts no splicing alteration. REVEL score 0.445 is borderline and does not independently predict pathogenicity. Two of three computational tools support a benign interpretation.
Hereditary Breast, Ovarian and Pancreatic Cancer Specification v1.0.0 lacked a usable explicit final combination framework, so generic ACMG/AMP 2015 final-combination rules were applied as fallback; applied criteria: BS1 supporting benign, BP4 supporting benign; combination = 2 supporting benign, which maps to Likely Benign.
Evidence summaries and captured source records, where available. Missing entries should not be interpreted as negative findings.
gnomAD v4.1: 644 / 1,595,894 alleles. Recorded AF 0.000403536. Recorded homozygote count 1.
This variant is present in gnomAD v2.1 (AF= 0.000312997; MAF= 0.03130%, 83/265178 alleles, homozygotes = 0) and has highest observed frequency in the Remaining individuals population (AF= 0.00127877; MAF= 0.12788%, 9/7038 alleles, homozygotes = 0); grpmax FAF= 0.0004311.
Recorded SpliceAI maximum delta score: 0.030. Refer to the recorded PP3/BP4 rationale for interpretation.
29 Uncertain significance · 22 Likely pathogenic · 1 Likely risk allele · 1 Established risk allele · 1 Pathogenic · 1 Likely Pathogenic · 1 Likely benign.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. CHEK2, an intracellular kinase involved in control of the cell cycle, is altered in various cancer types.
This variant has not previously been reported in somatic cancers (COSMIC).
This variant does not lie in a statistically significant hotspot.
ACMG/AMP criteria under ClinGen CHEK2 VCEP v1.0.0, with the data and sources behind each one.
26 criteria with recorded statuses: 2 met · 8 not met · 12 not assessed · 4 not applicable. Open any row for the full reasoning, the rule and the evidence behind it.
NM_007194.4:c.1427C>T (p.Thr476Met) is a missense variant in CHEK2 exon 13, located within the protein kinase domain.
This variant is present in gnomAD v2.1 at an allele frequency of 0.0313% (83/265,178 alleles, 0 homozygotes) and in gnomAD v4.1 at 0.0404% (644/1,595,894 alleles) including one homozygous carrier in the Middle Eastern subpopulation (AF 0.407%).
The variant is reported in ClinVar with conflicting classifications: Uncertain significance (29 clinical laboratories), Likely pathogenic (22 laboratories), and single submissions of Pathogenic, Likely benign, Likely risk allele, and Established risk allele (ClinVar Variation ID: 128060).
The Middle Eastern subpopulation allele frequency of 0.407% in gnomAD v4.1 exceeds the BS1 threshold of 0.3%, which is higher than expected for a pathogenic CHEK2 variant (BS1_Supporting).
Multiple in silico tools predict a benign effect: BayesDel score 0.096 is in the benign range and SpliceAI max delta 0.03 predicts no splicing alteration. REVEL score 0.445 is borderline (BP4_Supporting).
The variant was identified as a novel missense substitution in a Bulgarian breast cancer cohort (PMID:22862163, Angelova et al. 2012, n=145 patients), but no case-control statistics or functional characterization were provided.
No well-established functional assay data, segregation studies, or case-control analyses are available to confirm or refute pathogenicity for this specific variant.
The presence of a homozygous carrier in gnomAD v4.1 is notable for an autosomal dominant cancer predisposition gene, though formal BS2 criteria are not met because CHEK2-related cancer risk has incomplete penetrance and adult onset, and the phenotype of the homozygous individual is unknown.
Overall, the available evidence includes one supporting benign criterion (BS1) and one supporting benign criterion (BP4), with no pathogenic criteria met. The evidence favors a benign interpretation but remains insufficient for a definitive classification.
No criteria match.
Every interpreted variant in CHEK2, mapped onto the exon structure of NM_007194.4. Select a row to find it on the plot.
| Protein | Location | Classification | Link |
|---|
| Middle Eastern18 / 4,424 | 0.00411 hom |
| European (non-Finnish)577 / 1,179,424 | 0.00049 |
| Remaining individuals18 / 62,198 | 0.00029 |
| African/African American15 / 74,930 | 0.0002 |
| Admixed American10 / 59,988 | 0.00017 |
| South Asian6 / 90,970 | 6.6e-05 |
| Remaining individuals9 / 7,038 | 0.0013 |
| European (non-Finnish)62 / 124,190 | 0.0005 |
| African/African American6 / 23,448 | 0.00026 |
| Admixed American6 / 35,222 | 0.00017 |
This variant is present in gnomAD v4.1 (AF= 0.000403536; MAF= 0.04035%, 644/1595894 alleles, homozygotes = 1) and has highest observed frequency in the Middle Eastern population (AF= 0.00406872; MAF= 0.40687%, 18/4424 alleles, homozygotes = 1); grpmax FAF= 0.00262965.
This variant is present in gnomAD v2.1 (AF= 0.000312997; MAF= 0.03130%, 83/265178 alleles, homozygotes = 0) and has highest observed frequency in the Remaining individuals population (AF= 0.00127877; MAF= 0.12788%, 9/7038 alleles, homozygotes = 0); grpmax FAF= 0.0004311.
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.03). REVEL score = 0.445. BayesDel score = 0.0956883.
10 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= 0.000403536; MAF= 0.04035%, 644/1595894 alleles, homozygotes = 1) and has highest observed frequency in the Middle Eastern population (AF= 0.00406872; MAF= 0.40687%, 18/4424 alleles, homozygotes = 1); grpmax FAF= 0.00262965.
This variant is present in gnomAD v2.1 (AF= 0.000312997; MAF= 0.03130%, 83/265178 alleles, homozygotes = 0) and has highest observed frequency in the Remaining individuals population (AF= 0.00127877; MAF= 0.12788%, 9/7038 alleles, homozygotes = 0); grpmax FAF= 0.0004311.
This variant has been reported in ClinVar as Uncertain significance (29 clinical laboratories) and as Likely pathogenic (22 clinical laboratories) and as Likely risk allele (1 clinical laboratory) and as Established risk allele (1 clinical laboratory) and as Pathogenic (1 clinical laboratory) and as Likely Pathogenic (1 clinical laboratory) and as Likely benign (1 clinical laboratory). (ClinVarID = 128060)
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.03). REVEL score = 0.445. BayesDel score = 0.0956883.
OncoKB did not identify variant-specific reviewed functional evidence for this variant; gene-level curated context is available for reviewer follow-up. CHEK2, an intracellular kinase involved in control of the cell cycle, is altered in various cancer types.
This variant does not lie in a statistically significant hotspot. This variant has not previously been reported in somatic cancers (COSMIC).
This variant does not lie in a statistically significant hotspot.