NM_007194.4:c.1022A>G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM1BS2_Supporting

The NM_007194.4(CHEK2):c.1022A>G(p.Asn341Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000011 in 1,459,730 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N341D) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

CHEK2
NM_007194.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.29

Publications

6 publications found

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 Gene-Disease associations (from GenCC):

CHEK2-related cancer predisposition
Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
hereditary breast carcinoma
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen
Li-Fraumeni syndrome 2
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
acute myeloid leukemia
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
hereditary nonpolyposis colon cancer
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

CHEK2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 16 uncertain in NM_007194.4

BS2

High AC in GnomAdExome4 at 16 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHEK2	NM_007194.4 link	c.1022A>G	p.Asn341Ser	missense_variant	Exon 10 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.1022A>G	p.Asn341Ser	missense_variant	Exon 10 of 15	1	NM_007194.4	ENSP00000385747.1		O96017-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251164

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000110

AC:

AN:

1459730

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726350

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33434

American (AMR)

AF:

0.00

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39672

South Asian (SAS)

AF:

0.00

AC:

AN:

86198

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53350

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.0000144

AC:

AN:

1110160

Other (OTH)

AF:

0.00

AC:

AN:

60320

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.422

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Familial cancer of breast

Uncertain:1

Oct 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 341 of the CHEK2 protein (p.Asn341Ser). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with CHEK2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1379623). 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 disruptive. 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

Benign

0.20

BayesDel_addAF

Benign

-0.011

BayesDel_noAF

Benign

-0.25

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.20

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

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.98

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

M_CAP

Benign

0.038

MetaRNN

Uncertain

0.57

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

MetaSVM

Benign

-0.57

MutationAssessor

Benign

0.79

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

PhyloP100

6.3

PrimateAI

Uncertain

0.78

PROVEAN

Uncertain

-2.5

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

REVEL

Uncertain

0.31

Sift

Benign

0.036

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

Sift4G

Benign

0.092

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

Polyphen

0.95

P;P;.;P;P;P;D;.;.;.

Vest4

0.67

MutPred

0.64

Loss of catalytic residue at N341 (P = 0.1631);Loss of catalytic residue at N341 (P = 0.1631);.;Loss of catalytic residue at N341 (P = 0.1631);.;Loss of catalytic residue at N341 (P = 0.1631);.;.;.;.;

MVP

0.87

MPC

0.082

ClinPred

0.86

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.46

gMVP

0.46

Mutation Taster

=47/53

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over