ClinVar Miner

Submissions for variant NM_007194.4(CHEK2):c.1028T>G (p.Ile343Ser)

dbSNP: rs863224746
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000221836 SCV000279943 uncertain significance not provided 2016-02-29 criteria provided, single submitter clinical testing This variant is denoted CHEK2 c.1028T>G at the cDNA level, p.Ile343Ser (I343S) at the protein level, and results in the change of an Isoleucine to a Serine (ATT>AGT). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. CHEK2 Ile343Ser was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, suggesting it is not a common benign variant in these populations. Since Isoleucine and Serine differ in polarity, charge, size or other properties, this is considered a non-conservative amino acid substitution. CHEK2 Ile343Ser occurs at a position that is conserved across species and is located in the kinase domain (Desrichard 2011). In silico analyses predict that this variant is probably damaging to protein structure and function. Based on currently available evidence, it is unclear whether CHEK2 Ile343Ser is a pathogenic or benign variant. We consider it to be a variant of uncertain significance.
Invitae RCV002519752 SCV003218940 uncertain significance Familial cancer of breast 2022-06-23 criteria provided, single submitter clinical testing This variant has not been reported in the literature in individuals affected with CHEK2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces isoleucine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 343 of the CHEK2 protein (p.Ile343Ser). ClinVar contains an entry for this variant (Variation ID: 234873). 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0").

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