22-28710010-T-G

Variant names:

• chr22-28710010-T-G
• rs587782196
• NM_007194.4:c.842A>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007194.4(CHEK2):​c.842A>C​(p.Asn281Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000000736 in 1,359,044 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. N281S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
• Consequence: CHEK2 NM_007194.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 4.83
• Publications: 8 publications found

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: ClinGen, Ambry Genetics
• Li-Fraumeni syndrome 2

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• hereditary breast carcinoma

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• acute myeloid leukemia

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• hereditary nonpolyposis colon cancer

  Inheritance: Unknown Classification: LIMITED Submitted by: ClinGen
• familial ovarian cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007194.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHEK2	NM_007194.4	MANE Select	c.842A>C	p.Asn281Thr	missense	Exon 7 of 15	NP_009125.1	O96017-1
	CHEK2	NM_001005735.3		c.971A>C	p.Asn324Thr	missense	Exon 8 of 16	NP_001005735.1
	CHEK2	NM_001438293.1		c.935A>C	p.Asn312Thr	missense	Exon 8 of 16	NP_001425222.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHEK2	ENST00000404276.6	TSL:1 MANE Select	c.842A>C	p.Asn281Thr	missense	Exon 7 of 15	ENSP00000385747.1	O96017-1
	CHEK2	ENST00000382580.6	TSL:1	c.971A>C	p.Asn324Thr	missense	Exon 8 of 16	ENSP00000372023.2	O96017-9
	CHEK2	ENST00000402731.6	TSL:1	c.641A>C	p.Asn214Thr	missense	Exon 5 of 13	ENSP00000384835.2	A0A7P0MUT5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.36e-7 AC: 1 AN: 1359044 Hom.: 0 Cov.: 23 AF XY: 0.00 AC XY: 0 AN XY: 681522

African (AFR) AF: 0.00 AC: 0 AN: 31304

American (AMR) AF: 0.00 AC: 0 AN: 44378

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25364

East Asian (EAS) AF: 0.00 AC: 0 AN: 39088

South Asian (SAS) AF: 0.00 AC: 0 AN: 83804

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53188

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4354

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1020880

Other (OTH) AF: 0.0000176 AC: 1 AN: 56684

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Hereditary cancer-predisposing syndrome (2)
-	1	-	Familial cancer of breast (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.063	T
BayesDel_noAF	Benign	-0.33
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T
Eigen	Benign	0.045
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.025	T
MetaRNN	Uncertain	0.44	T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	0.69	N
PhyloP100		4.8
PrimateAI	Uncertain	0.57	T
PROVEAN	Uncertain	-2.4	N
REVEL	Benign	0.082
Sift	Benign	0.063	T
Sift4G	Benign	0.32	T
Polyphen		0.0090	B
Vest4		0.41
MutPred		0.43		Loss of sheet (P = 0.0817)
MVP		0.76
MPC		0.038
ClinPred		0.70	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.34
gMVP		0.27
Mutation Taster		=49/51	disease causing

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

Other links and lift over

dbSNP: rs587782196; hg19: chr22-29105998;