chr22-28727858-T-A

Position:

• chr22-28727858-T-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_007194.4(CHEK2):​c.320-2491A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.576 in 152,170 control chromosomes in the GnomAD database, including 26,177 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 0.58 (26177 hom., cov: 34)
  • Failed GnomAD Quality Control
• Consequence: CHEK2 NM_007194.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.04

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.73 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CHEK2	NM_007194.4	c.320-2491A>T		intron_variant		ENST00000404276.6	NP_009125.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHEK2	ENST00000404276.6	c.320-2491A>T		intron_variant		1	NM_007194.4	ENSP00000385747	P2

Frequencies

GnomAD3 genomes AF: 0.576 AC: 87537 AN: 152052 Hom.: 26164 Cov.: 34

Gnomad AFR AF: 0.411

Gnomad AMI AF: 0.649

Gnomad AMR AF: 0.581

Gnomad ASJ AF: 0.665

Gnomad EAS AF: 0.742

Gnomad SAS AF: 0.750

Gnomad FIN AF: 0.636

Gnomad MID AF: 0.649

Gnomad NFE AF: 0.633

Gnomad OTH AF: 0.610

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

GnomAD4 genome AF: 0.576 AC: 87575 AN: 152170 Hom.: 26177 Cov.: 34 AF XY: 0.579 AC XY: 43058 AN XY: 74390

Gnomad4 AFR AF: 0.411

Gnomad4 AMR AF: 0.581

Gnomad4 ASJ AF: 0.665

Gnomad4 EAS AF: 0.743

Gnomad4 SAS AF: 0.750

Gnomad4 FIN AF: 0.636

Gnomad4 NFE AF: 0.633

Gnomad4 OTH AF: 0.607

Alfa AF: 0.604 Hom.: 3545

Bravo AF: 0.564

Asia WGS AF: 0.750 AC: 2609 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	1.3
DANN	Benign	0.29

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs5762760; hg19: chr22-29123846; COSMIC: COSV60415779; COSMIC: COSV60415779;