22-28689167-C-G

Position:

chr22-28689167-C-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_007194.4(CHEK2):c.1510G>C(p.Glu504Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000144 in 1,595,222 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

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

CHEK2
NM_007194.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:8B:2

Conservation

PhyloP100: 1.37

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 Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.053901017).

BP6

Variant 22-28689167-C-G is Benign according to our data. Variant chr22-28689167-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 142479.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=8, Likely_benign=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHEK2	NM_007194.4 linkuse as main transcript	c.1510G>C	p.Glu504Gln	missense_variant	14/15	ENST00000404276.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHEK2	ENST00000404276.6 linkuse as main transcript	c.1510G>C	p.Glu504Gln	missense_variant	14/15	1	NM_007194.4	P2	O96017-1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000459

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000428

AC:

AN:

233634

Hom.:

AF XY:

0.0000468

AC XY:

AN XY:

128330

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000262

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:

0.000168

GnomAD4 exome

AF:

0.0000104

AC:

AN:

1443070

Hom.:

Cov.:

AF XY:

0.0000125

AC XY:

AN XY:

718374

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000246

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:

0.0000666

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152152

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000459

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.000125

ExAC

AF:

0.0000348

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:8Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial cancer of breast

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Jan 20, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Mar 08, 2023	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]. -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Jan 27, 2024	This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 504 of the CHEK2 protein (p.Glu504Gln). This variant is present in population databases (rs587782489, gnomAD 0.03%). This missense change has been observed in individual(s) with colorectal cancer (PMID: 28577310). ClinVar contains an entry for this variant (Variation ID: 142479). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. Experimental studies have shown that this missense change does not substantially affect CHEK2 function (PMID: 28577310). 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. -

Hereditary cancer-predisposing syndrome

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jan 30, 2023	The p.E504Q variant (also known as c.1510G>C), located in coding exon 13 of the CHEK2 gene, results from a G to C substitution at nucleotide position 1510. The glutamic acid at codon 504 is replaced by glutamine, an amino acid with highly similar properties. This alteration was detected in 0/1054 Hispanic BRCA1/2-negative probands with hereditary breast cancer and 2/1189 controls (Weitzel JN et al. Cancer, 2019 Aug;125:2829-2836). This alteration behaved as functional in an in vivo, yeast-based growth rate assay (Delimitsou A et al. Hum Mutat, 2019 05;40:631-648). This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Nov 12, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 29, 2016	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Sep 11, 2023	Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Published functional studies demonstrate no damaging effect: cell growth and proliferation after DNA damage similar to wild type (Delimitsou et al., 2019); This variant is associated with the following publications: (PMID: 25318351, 24356096, 30851065, 33471991, 31206626, 28577310) -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Apr 20, 2023	The frequency of this variant in the general population, 0.00026 (9/35206 chromosomes, http://gnomad.broadinstitute.org), is uninformative in assessment of its pathogenicity. In the published literature, this variant has been reported in an individual undergoing hereditary cancer testing and an individual with a Lynch-like Syndrome phenotype (PMID: 25318351 (2014), 28577310 (2017)). It has also been detected in a healthy, cancer-free Hispanic individual (PMID: 31206626 (2019)). In addition, this variant has been reported as having a benign effect on CHEK2 protein activity using a yeast based functional assay (PMID: 30851065 (2019)). Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Feb 13, 2023

Variant summary: CHEK2 c.1510G>C (p.Glu504Gln) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 4.3e-05 in 233634 control chromosomes, predominantly at a frequency of 0.00026 within the Latino subpopulation in the gnomAD database. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.1510G>C has been reported in the literature in an individual with MSH2-deficient colorectal cancer in whom a germline MSH2 alteration was not reportedly identified (example, Vargas-Parra_2017), as a VUS in settings of multigene panel testing in an individual tested for an unspecified hereditary cancer (example, Yorczyk_2015) and as a VUS in settings of multigene panel testing in an individual with BRCA-negative breast cancer (example, Weitzel_2019). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. At least one publication reports experimental evidence evaluating an impact on protein function (Delimitsou_2019). These results showed no damaging effect of this variant in a yeast-based in-vitro assay. Eight clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation (VUS, n=7; likely benign, n=1). Based on the evidence outlined above, the variant was classified as VUS-possibly benign. -

Familial cancer of breast;C0376358:Malignant tumor of prostate;C0585442:Bone osteosarcoma;C5882668:Li-Fraumeni syndrome 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.071

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.42

CADD

Benign

DANN

Benign

0.57

DEOGEN2

Benign

0.11

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

Eigen

Benign

-0.80

Eigen_PC

Benign

-0.87

FATHMM_MKL

Benign

0.043

M_CAP

Benign

0.019

MetaRNN

Benign

0.054

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.34

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

MutationTaster

Benign

1.0

N;N;N;N;N;N;N;N;N;N;N

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.84

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

REVEL

Benign

0.046

Sift

Benign

0.37

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

Sift4G

Benign

0.48

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

Polyphen

0.016

B;B;B;.;B;B;B;B;B

Vest4

0.11

MutPred

0.15

Gain of helix (P = 0.062);.;Gain of helix (P = 0.062);.;Gain of helix (P = 0.062);.;Gain of helix (P = 0.062);.;.;

MVP

0.69

MPC

0.020

ClinPred

0.014

GERP RS

0.86

Varity_R

0.15

gMVP

0.33

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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