chr22-28714014-T-C

Variant names:

• chr22-28714014-T-C
• rs5752777
• NM_007194.4:c.684-1997A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_007194.4(CHEK2):​c.684-1997A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.212 in 152,158 control chromosomes in the GnomAD database, including 3,726 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.21 (3726 hom., cov: 32)
• Consequence: CHEK2 NM_007194.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.00
• Publications: 4 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: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.04).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.394 is higher than 0.05.

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.684-1997A>G		intron	N/A	NP_009125.1	O96017-1
	CHEK2	NM_001005735.3		c.813-1997A>G		intron	N/A	NP_001005735.1
	CHEK2	NM_001438293.1		c.777-1997A>G		intron	N/A	NP_001425222.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHEK2	ENST00000404276.6	TSL:1 MANE Select	c.684-1997A>G		intron	N/A	ENSP00000385747.1	O96017-1
	CHEK2	ENST00000382580.6	TSL:1	c.813-1997A>G		intron	N/A	ENSP00000372023.2	O96017-9
	CHEK2	ENST00000402731.6	TSL:1	c.483-1997A>G		intron	N/A	ENSP00000384835.2	A0A7P0MUT5

Frequencies

GnomAD3 genomes AF: 0.212 AC: 32286 AN: 152040 Hom.: 3720 Cov.: 32

Gnomad AFR AF: 0.252

Gnomad AMI AF: 0.200

Gnomad AMR AF: 0.282

Gnomad ASJ AF: 0.294

Gnomad EAS AF: 0.408

Gnomad SAS AF: 0.272

Gnomad FIN AF: 0.153

Gnomad MID AF: 0.206

Gnomad NFE AF: 0.158

Gnomad OTH AF: 0.241

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.212 AC: 32326 AN: 152158 Hom.: 3726 Cov.: 32 AF XY: 0.217 AC XY: 16130 AN XY: 74386

African (AFR) AF: 0.252 AC: 10436 AN: 41476

American (AMR) AF: 0.282 AC: 4317 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.294 AC: 1019 AN: 3470

East Asian (EAS) AF: 0.409 AC: 2112 AN: 5166

South Asian (SAS) AF: 0.273 AC: 1314 AN: 4820

European-Finnish (FIN) AF: 0.153 AC: 1624 AN: 10592

Middle Eastern (MID) AF: 0.207 AC: 61 AN: 294

European-Non Finnish (NFE) AF: 0.158 AC: 10752 AN: 68026

Other (OTH) AF: 0.241 AC: 509 AN: 2112

Alfa AF: 0.187 Hom.: 470

Bravo AF: 0.228

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.45
DANN	Benign	0.26
PhyloP100		-1.0
Mutation Taster		=100/0	polymorphism (auto)

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: rs5752777; hg19: chr22-29110002; COSMIC: COSV60415734; COSMIC: COSV60415734;