22-28699843-C-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_007194.4(CHEK2):c.1003G>T(p.Val335Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,458,950 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

CHEK2
NM_007194.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.67

Variant links:

Genes affected

CHEK2 (HGNC:16627): (checkpoint kinase 2) In response to DNA damage and replication blocks, cell cycle progression is halted through the control of critical cell cycle regulators. The protein encoded by this gene is a cell cycle checkpoint regulator and putative tumor suppressor. It contains a forkhead-associated protein interaction domain essential for activation in response to DNA damage and is rapidly phosphorylated in response to replication blocks and DNA damage. When activated, the encoded protein is known to inhibit CDC25C phosphatase, preventing entry into mitosis, and has been shown to stabilize the tumor suppressor protein p53, leading to cell cycle arrest in G1. In addition, this protein interacts with and phosphorylates BRCA1, allowing BRCA1 to restore survival after DNA damage. Mutations in this gene have been linked with Li-Fraumeni syndrome, a highly penetrant familial cancer phenotype usually associated with inherited mutations in TP53. Also, mutations in this gene are thought to confer a predisposition to sarcomas, breast cancer, and brain tumors. This nuclear protein is a member of the CDS1 subfamily of serine/threonine protein kinases. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

CHEK2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHEK2	NM_007194.4 link	c.1003G>T	p.Val335Leu	missense_variant	Exon 9 of 15	ENST00000404276.6	NP_009125.1	O96017-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHEK2	ENST00000404276.6 link	c.1003G>T	p.Val335Leu	missense_variant	Exon 9 of 15	1	NM_007194.4	ENSP00000385747.1		O96017-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251458

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135902

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1458950

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726050

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:1

Oct 26, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.V335L variant (also known as c.1003G>T), located in coding exon 8 of the CHEK2 gene, results from a G to T substitution at nucleotide position 1003. The valine at codon 335 is replaced by leucine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Familial cancer of breast

Uncertain:1

Nov 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 335 of the CHEK2 protein (p.Val335Leu). This variant is present in population databases (no rsID available, gnomAD 0.003%). This missense change has been observed in individual(s) with breast cancer (PMID: 27616075, 30303537). ClinVar contains an entry for this variant (Variation ID: 656556). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.70

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.33

T;.;T;.;T;.;T;.;.;.;.;.

Eigen

Benign

0.016

Eigen_PC

Benign

0.025

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.90

.;D;.;D;.;D;D;D;.;D;D;D

M_CAP

Benign

0.045

MetaRNN

Uncertain

0.62

D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Benign

-0.91

MutationAssessor

Benign

-0.81

N;N;N;.;N;.;N;.;N;.;.;.

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-2.7

D;N;D;.;D;D;.;D;N;N;.;D

REVEL

Uncertain

0.33

Sift

Uncertain

0.0050

D;D;D;.;D;T;.;T;D;T;.;D

Sift4G

Uncertain

0.0080

D;D;D;.;D;D;.;T;D;T;.;.

Polyphen

1.0

D;D;D;.;D;D;D;D;D;.;.;.

Vest4

0.78

MutPred

0.64

Loss of catalytic residue at V335 (P = 0.0135);Loss of catalytic residue at V335 (P = 0.0135);Loss of catalytic residue at V335 (P = 0.0135);.;Loss of catalytic residue at V335 (P = 0.0135);.;Loss of catalytic residue at V335 (P = 0.0135);.;Loss of catalytic residue at V335 (P = 0.0135);.;.;.;

MVP

0.67

MPC

0.069

ClinPred

0.91

GERP RS

4.7

Varity_R

0.87

gMVP

0.59

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over