CHEK2 E302Dfs*2 (c.906del, rs2052974883)

Dante Labs

Sequence your genome

Variant

CHEK2 E302Dfs*2

NM_007194.4(CHEK2):c.906del (p.Glu302AspfsTer2)

Also known as

p.Glu302AspfsTer2
p.E302Dfs*2
rs2052974883

ClinVar classification: Pathogenic/likely pathogenic
Review status: 2 stars out of 4criteria provided, multiple submitters, no conflicts
Last evaluated: 27 June 2023

Data current to ClinVar release 2026-10-12 · Dante Labs data release 2026.10.19-9814e911Facts last changed 18 October 2026

This page as data

Add .json to the page's address, or ask for application/json, to read it as JSON.

library(jsonlite)

url <- "https://dantelabs.com/genes/chek2/variants/e302dfs2.json"
page <- fromJSON(url)
page$variant$name

Open the JSON

Summary

E302Dfs*2 is a frameshift variant in CHEK2: it adds or removes DNA letters in a way that shifts how the rest of the gene's code is read. ClinVar classifies it as pathogenic or likely pathogenic for Hereditary breast cancer (criteria provided, multiple submitters, no conflicts).

ClinVar classifications

Condition	Classification	Review status	Submissions	Last evaluated
Hereditary breast cancerClinVar VCV000952455 (opens in a new tab)	Pathogenic/likely pathogenic	2 stars out of 4criteria provided, multiple submitters, no conflicts	3 submissions	27 June 2023

Classifications as ClinVar records them in release 2026-10-12. ClinVar updates them as evidence is reviewed.

ACMG/AMP criteria

The ACMG/AMP criteria E302Dfs*2 meets, from its predicted effect in CHEK2, gnomAD and ClinVar.

Criterion	Strength	Rests on
PVS1Null variant where loss of function causes disease	Very strong	frameshift_variant on NM_007194.4
PM2Absent or very rare in population databases	Supporting	Not seen in gnomAD exomes, gnomAD genomes
PP5A reputable source reports it as pathogenic	Supporting	ClinVar: Pathogenic/likely pathogenic (criteria provided, multiple submitters, no conflicts)

On these criteria alone: pathogenic.

Assessed automatically, without functional, computational or family evidence. Not a clinical classification.

Population frequency

How often E302Dfs*2 is seen among the people whose exomes and genomes gnomAD 4.1 brings together.

Dataset	Allele frequency	Allele count	Homozygotes	Commonest in
gnomAD exomes	Not seen	0 of 0	0
gnomAD genomes	Not seen	0 of 0	0

Figures from gnomAD 4.1, as gnomAD publishes them. Groups are genetic ancestry groups as gnomAD infers them. They describe the variant in gnomAD's populations, not anyone's result.

E302Dfs*2 in the gnomAD browser (opens in a new tab)

Where it lies in CHEK2

E302Dfs*2 lies in exon 8 of the 15 in CHEK2's MANE Select transcript, NM_007194.4.

CHEK2 variants in exon 8 →CHEK2's gene diagram →

Molecular details

Gene	CHEK2
Transcript	NM_007194.4MANE Select
Coding DNA change (HGVS c.)	c.906del
Protein change (HGVS p.)	p.Glu302AspfsTer2p.E302Dfs*2
Predicted consequence	Frameshiftframeshift_variant (opens in a new tab)frameshift_truncation (opens in a new tab)exonic_splice_region_variant (opens in a new tab)
Predicted impact	High
Position (GRCh38)	chr22:28703506 AT>A
Position (GRCh37)	chr22:29099494 AT>A
dbSNP ID	rs2052974883 (opens in a new tab)
ClinVar Variation ID	VCV000952455 (opens in a new tab)
ClinVar Allele ID	929437
ClinGen Allele Registry ID	CA1139666358 (opens in a new tab)
ClinVar name	NM_007194.4(CHEK2):c.906del (p.Glu302fs)

CHEK2 E302Dfs*2 in other databases

Reports that look at this variant (1)

These Genome Test condition reports include E302Dfs*2 among the variants they look at.

Report	Conditions	Inheritance
Breast and Ovarian Cancer Genes Beyond BRCA1/2	Hereditary breast cancer	Autosomal dominant

All CHEK2 variants

Limitations

This page describes publicly available information about a genetic variant. It is not a diagnosis, and it says nothing about whether you or anyone else carries this variant.

Classifications come from ClinVar and change as new evidence is reviewed. A classification here may differ from the one in ClinVar today, or from the one a laboratory reports.

Whole genome sequencing with short reads can miss or miscall some variants, particularly in repeated or highly similar stretches of DNA and in large insertions, deletions or rearrangements.

If you have questions about a variant in your own results or in your family, talk to a genetic counsellor or your doctor.

Sources & credits

Classifications from ClinVar (release 2026-10-12), National Center for Biotechnology Information.
Condition terms from the Mondo Disease Ontology (release 2026-10-06), used under CC BY 4.0.
Gene symbols and names from the HUGO Gene Nomenclature Committee (release 2026-10-16).
Allele identifiers from the ClinGen Allele Registry (release 2026-10-19-c4908f54).
Reference SNP identifiers from dbSNP (release b157), National Center for Biotechnology Information.
Gene–disease links from the Gene Curation Coalition, GenCC (release 2026-10-19).
Difficult regions from the Genome in a Bottle Consortium (release v3.6).
Transcripts from MANE (release v1.5), NCBI and EMBL-EBI.
Predicted consequences from mehari (release 0.11.0), with transcript models from cdot.
Built from Dante Labs data release 2026.10.19-9814e911 of 19 October 2026.

Cite this page

APA

Dante Labs. (18 October 2026). CHEK2 E302Dfs*2 (c.906del, rs2052974883) (Version 2026.10.19-9814e911). Retrieved 20 October 2026, from https://dantelabs.com/genes/chek2/variants/e302dfs2

Vancouver

Dante Labs. CHEK2 E302Dfs*2 (c.906del, rs2052974883) [Internet]. Version 2026.10.19-9814e911. 18 October 2026 [cited 20 October 2026]. Available from: https://dantelabs.com/genes/chek2/variants/e302dfs2

Download citationRIS BibTeX CSL-JSON

Read your whole genome

From $449Free shipping · Results in 6–8 weeks

Explore the Genome Test