rs201206424
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM5PP3_Moderate
The NM_007194.4(CHEK2):c.1036C>T(p.Arg346Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000446 in 1,612,746 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. R346H) has been classified as Likely pathogenic.
Frequency
Consequence
NM_007194.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CHEK2 | NM_007194.4 | c.1036C>T | p.Arg346Cys | missense_variant | 10/15 | ENST00000404276.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CHEK2 | ENST00000404276.6 | c.1036C>T | p.Arg346Cys | missense_variant | 10/15 | 1 | NM_007194.4 | P2 |
Frequencies
GnomAD3 genomes ? AF: 0.00000658 AC: 1AN: 152032Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.0000517 AC: 13AN: 251222Hom.: 0 AF XY: 0.0000589 AC XY: 8AN XY: 135788
GnomAD4 exome AF: 0.0000486 AC: 71AN: 1460714Hom.: 0 Cov.: 29 AF XY: 0.0000495 AC XY: 36AN XY: 726734
GnomAD4 genome ? AF: 0.00000658 AC: 1AN: 152032Hom.: 0 Cov.: 33 AF XY: 0.0000135 AC XY: 1AN XY: 74258
ClinVar
Submissions by phenotype
Familial cancer of breast Uncertain:5
Uncertain significance, criteria provided, single submitter | clinical testing | Mendelics | Jul 02, 2018 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Myriad Genetics, Inc. | Mar 09, 2023 | This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jan 04, 2024 | This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 346 of the CHEK2 protein (p.Arg346Cys). This variant is present in population databases (rs201206424, gnomAD 0.009%). This missense change has been observed in individual(s) with breast cancer (PMID: 21244692, 27595995, 30651582, 30851065, 33128190). ClinVar contains an entry for this variant (Variation ID: 142222). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on CHEK2 function (PMID: 30851065, 36468172). RNA analysis performed to evaluate the impact of this missense change on mRNA splicing indicates it does not significantly alter splicing (Invitae). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Counsyl | Feb 02, 2018 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Oct 30, 2023 | - - |
not provided Pathogenic:2Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | May 19, 2023 | - - |
Likely pathogenic, no assertion criteria provided | clinical testing | Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen | - | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Sep 22, 2023 | Observed in individuals with breast or ovarian cancer (Zheng et al., 2018; Girard et al., 2019; Krivokuca et al., 2019; Apostolou et al., 2021; Bhai et al., 2021; Fonfria et al., 2021; Gomes et al., 2021; Guindalini et al., 2022); Published functional studies demonstrate a damaging effect: reduced cell growth rate following DNA damage (Delimitsou et al., 2019); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 21244692, 26787654, 22114986, 28452373, 30287823, 31050813, 28580595, 30651582, 30303537, 33128190, 34204722, 33925588, 33134171, 27595995, 30851065, 33471991, 30975761, 22419737, 19782031, 36315097, 30130155, 34326862, 36978154, 35441217, 36243179, 35264596) - |
Likely pathogenic, no assertion criteria provided | clinical testing | Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute | - | - - |
Hereditary cancer-predisposing syndrome Uncertain:3
Uncertain significance, criteria provided, single submitter | curation | Sema4, Sema4 | Dec 17, 2021 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Mar 12, 2024 | The p.R346C variant (also known as c.1036C>T), located in coding exon 9 of the CHEK2 gene, results from a C to T substitution at nucleotide position 1036. The arginine at codon 346 is replaced by cysteine, an amino acid with highly dissimilar properties. In a study involving 42671 cases and 42164 controls, this variant was significantly associated with breast cancer [OR 5.06 (95% CI 1.09 to 23.5); p=0.017] (Southey MC et al. J. Med. Genet. 2016 Dec;53:800-811). In another study, this variant did not segregate with cancer in one family, but did show loss of heterozygosity in a tumor specimen (Grasel RS et al. Front Oncol, 2020 Oct;10:571330). This alteration has been identified in individuals diagnosed with breast cancer, ovarian cancer and mesothelioma (Le Calvez-Kelm F et al. Breast Cancer Res. 2011 Jan;13:R6; Zheng Y et al. J Clin Oncol, 2018 Oct;36:2820-2825; Girard E et al. Int. J. Cancer, 2019 04;144:1962-1974; Hassan R et al. Proc Natl Acad Sci U S A, 2019 04;116:9008-9013; Krivokuca A et al. J. Hum. Genet., 2019 Apr;64:281-290; Apostolou P et al. Cancers (Basel), 2021 Apr;13:; Gomes R et al. Breast Cancer Res Treat, 2021 Feb;185:851-861). Additionally, this alteration behaved as non-functional in an in vivo, yeast-based growth rate assay (Delimitsou A et al. Hum. Mutat., 2019 05;40:631-648). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Color Diagnostics, LLC DBA Color Health | Dec 01, 2023 | This missense variant replaces arginine with cysteine at codon 346 in the kinase domain of the CHEK2 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). A functional study in human cells has shown the mutant protein to be defective in KAP1 phosphorylation and CHEK2 autophosphorylation (PMID: 37449874) and a study in yeast has shown the mutant protein to be defective in DNA damage response (PMID: 30851065). This variant has been reported individuals affected with breast cancer (PMID: 21244692, 30303537, 33128190, 33925588, 34204722), ovarian cancer (PMID: 30651582) and mesothelioma (PMID: 30975761), as well as in unaffected individuals (PMID: 30287823, 31214711, 32980694). This variant has been reported in four large breast cancer case-control studies or meta-analyses; reported in 23/73048 cases and 4/88658 unaffected controls (OR=5.85, 95%CI 2.00-16.92) (PMID: 37449874), 10/60466 cases and 2/53461 unaffected controls (OR=4.421, 95%CI 0.969-20.18) (PMID: 33471991; Leiden Open Variation Database DB-ID CHEK2_00011), 9/42671 cases and 2/42164 unaffected controls (OR=5.06. 95%CI 1.09-23.5) (PMID: 27595995), and 3/1313 cases and 0/1123 unaffected controls (OR=5.91, 95%CI 0.3051 to 114.5995) (PMID: 21244692). This variant has been identified in 13/251222 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital | Aug 15, 2023 | - - |
Familial cancer of breast;C0376358:Malignant tumor of prostate;C0585442:Bone osteosarcoma;C1836482:Li-Fraumeni syndrome 2 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Oct 31, 2018 | - - |
Breast and/or ovarian cancer Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario | Feb 07, 2023 | - - |
Malignant tumor of breast Uncertain:1
Uncertain significance, no assertion criteria provided | clinical testing | Department of Pathology and Laboratory Medicine, Sinai Health System | - | The CHEK2 p.Arg346Cys variant was identified in 3 of 2606 proband chromosomes (frequency: 0.001) from individuals or families with breast cancer (Le Calvez-Kelm 2011). The variant was also identified in dbSNP (ID: rs201206424) as "With Uncertain significance allele", ClinVar (classified as uncertain significance by Ambry Genetics, GeneDx, Invitae, Color Genomics, and Counsyl), and Cosmic (3x in breast, large intestine or lung tissue); it was not identified in MutDB or the Zhejiang University database. The variant was identified in control databases in 13 of 246016 chromosomes at a frequency of 0.00005 (Genome Aggregation Database Feb 27, 2017) in the following populations: European in 10 of 111540 chromosomes (freq: 0.00009), Other in 1 of 5472 chromosomes (freq: 0.0002), East Asian in 1 of 17248 chromosomes (freq: 0.00006), and South Asian in 1 of 30776 chromosomes (freq: 0.00003); it was not observed in the African, Latino, Ashkenazi Jewish, or Finnish populations. The p.Arg346 residue is conserved across mammals and other organisms and 5 of 5 computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) suggest that the variant may impact the protein; however, this information is not predictive enough to assume pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. - |
Hereditary breast ovarian cancer syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | research | Molecular Oncology Research Center, Barretos Cancer Hospital | Aug 01, 2020 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at