chr22-28695237-C-G

Variant names:

• chr22-28695237-C-G
• rs549755590
• NM_007194.4:c.1265G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM1 BP4 BS2_Supporting

The NM_007194.4(CHEK2):​c.1265G>C​(p.Ser422Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000761 in 1,575,974 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 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. S422R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000077 (0 hom.)
• Consequence: CHEK2 NM_007194.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:7
• Conservation: PhyloP100: 6.26
• Publications: 11 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: Ambry Genetics, ClinGen
• 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 0 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 65 uncertain in NM_007194.4
• BP4: Computational evidence support a benign effect (MetaRNN=0.3046047).
• BS2: High AC in GnomAdExome4 at 11 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

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.1265G>C	p.Ser422Thr	missense	Exon 12 of 15	NP_009125.1	O96017-1
	CHEK2	NM_001005735.3		c.1394G>C	p.Ser465Thr	missense	Exon 13 of 16	NP_001005735.1
	CHEK2	NM_001438293.1		c.1358G>C	p.Ser453Thr	missense	Exon 13 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.1265G>C	p.Ser422Thr	missense	Exon 12 of 15	ENSP00000385747.1	O96017-1
	CHEK2	ENST00000382580.6	TSL:1	c.1394G>C	p.Ser465Thr	missense	Exon 13 of 16	ENSP00000372023.2	O96017-9
	CHEK2	ENST00000402731.6	TSL:1	c.1064G>C	p.Ser355Thr	missense	Exon 10 of 13	ENSP00000384835.2	A0A7P0MUT5

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152170 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000799 AC: 2 AN: 250340 AF XY: 0.00000739

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000109

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000773 AC: 11 AN: 1423686 Hom.: 0 Cov.: 25 AF XY: 0.00000563 AC XY: 4 AN XY: 710632

African (AFR) AF: 0.00 AC: 0 AN: 32644

American (AMR) AF: 0.00 AC: 0 AN: 44636

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25870

East Asian (EAS) AF: 0.000278 AC: 11 AN: 39502

South Asian (SAS) AF: 0.00 AC: 0 AN: 85484

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53354

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5668

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1077446

Other (OTH) AF: 0.00 AC: 0 AN: 59082

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152288 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74458

African (AFR) AF: 0.00 AC: 0 AN: 41564

American (AMR) AF: 0.00 AC: 0 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10604

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68028

Other (OTH) AF: 0.00 AC: 0 AN: 2116

ExAC AF: 0.0000247 AC: 3

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	Familial cancer of breast (2)
-	2	-	Hereditary cancer-predisposing syndrome (2)
-	1	-	CHEK2-related cancer predisposition (1)
-	1	-	Hereditary breast ovarian cancer syndrome (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.51
BayesDel_addAF	Benign	-0.27	T
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	T
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.30	T
MetaSVM	Benign	-0.67	T
MutationAssessor	Benign	-0.13	N
PhyloP100		6.3
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.16
Sift	Benign	0.17	T
Sift4G	Benign	0.17	T
Polyphen		0.74	P
Vest4		0.38
MutPred		0.62		Loss of glycosylation at S422 (P = 0.0964)
MVP		0.48
MPC		0.027
ClinPred		0.27	T
GERP RS		5.8
Varity_R		0.59
gMVP		0.58
Mutation Taster		=63/37	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs549755590; hg19: chr22-29091225;