rs1076807

Variant names:

• chr22-28706347-A-T
• rs1076807
• NM_007194.4:c.847-2781T>A

Variant summary

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

The NM_007194.4(CHEK2):​c.847-2781T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.089 in 152,086 control chromosomes in the GnomAD database, including 745 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 0.089 (745 hom., cov: 32)
• Consequence: CHEK2 NM_007194.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.240
• 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: 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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.165 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHEK2	NM_007194.4	c.847-2781T>A		intron_variant	Intron 7 of 14	ENST00000404276.6	NP_009125.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHEK2	ENST00000404276.6	c.847-2781T>A		intron_variant	Intron 7 of 14	1	NM_007194.4	ENSP00000385747.1

Frequencies

GnomAD3 genomes AF: 0.0889 AC: 13517 AN: 151968 Hom.: 743 Cov.: 32

Gnomad AFR AF: 0.0646

Gnomad AMI AF: 0.153

Gnomad AMR AF: 0.160

Gnomad ASJ AF: 0.222

Gnomad EAS AF: 0.127

Gnomad SAS AF: 0.174

Gnomad FIN AF: 0.0525

Gnomad MID AF: 0.165

Gnomad NFE AF: 0.0756

Gnomad OTH AF: 0.121

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

GnomAD4 genome AF: 0.0890 AC: 13530 AN: 152086 Hom.: 745 Cov.: 32 AF XY: 0.0916 AC XY: 6807 AN XY: 74344

African (AFR) AF: 0.0648 AC: 2690 AN: 41500

American (AMR) AF: 0.159 AC: 2433 AN: 15260

Ashkenazi Jewish (ASJ) AF: 0.222 AC: 771 AN: 3466

East Asian (EAS) AF: 0.128 AC: 658 AN: 5152

South Asian (SAS) AF: 0.174 AC: 840 AN: 4816

European-Finnish (FIN) AF: 0.0525 AC: 555 AN: 10578

Middle Eastern (MID) AF: 0.167 AC: 49 AN: 294

European-Non Finnish (NFE) AF: 0.0757 AC: 5145 AN: 68004

Other (OTH) AF: 0.119 AC: 250 AN: 2106

Alfa AF: 0.0794 Hom.: 61

Bravo AF: 0.0969

Asia WGS AF: 0.155 AC: 537 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	9.9
DANN	Benign	0.74
PhyloP100		0.24
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		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: rs1076807; hg19: chr22-29102335;