Genetic Variant NM_007194.4:c.434G>T (chr22-28725253-C-A) – ACMG Classification: Likely_pathogenic (8 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1PM2PM5PP3_Moderate

The NM_007194.4(CHEK2):c.434G>T(p.Arg145Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R145Q) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CHEK2
NM_007194.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.03

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

PM1

In a domain FHA (size 62) in uniprot entity CHK2_HUMAN there are 10 pathogenic changes around while only 2 benign (83%) in NM_007194.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr22-28725253-C-T is described in Lovd as [Pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.85

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHEK2	NM_007194.4 link	c.434G>T	p.Arg145Leu	missense_variant	Exon 3 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.434G>T	p.Arg145Leu	missense_variant	Exon 3 of 15	1	NM_007194.4	ENSP00000385747.1		O96017-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1461818

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727212

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.83

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.36

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.57

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

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

0.97

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

M_CAP

Uncertain

0.12

MetaRNN

Pathogenic

0.85

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

MetaSVM

Uncertain

0.33

MutationAssessor

Benign

1.7

L;L;L;L;.;L;L;.;.;.;.;.

PrimateAI

Uncertain

0.59

PROVEAN

Pathogenic

-4.8

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

REVEL

Pathogenic

0.77

Sift

Uncertain

0.0080

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

Sift4G

Benign

0.072

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

Polyphen

0.96

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

Vest4

0.84

MutPred

0.64

Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);.;Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);.;Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);Loss of MoRF binding (P = 0.007);

MVP

0.96

MPC

0.17

ClinPred

0.97

GERP RS

5.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.84

gMVP

0.75

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over