ClinVar Miner

Submissions for variant NM_007194.4(CHEK2):c.658T>C (p.Tyr220His)

dbSNP: rs1555924429
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Ambry Genetics RCV000563992 SCV000666360 uncertain significance Hereditary cancer-predisposing syndrome 2023-02-16 criteria provided, single submitter clinical testing The p.Y220H variant (also known as c.658T>C), located in coding exon 4 of the CHEK2 gene, results from a T to C substitution at nucleotide position 658. The tyrosine at codon 220 is replaced by histidine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Invitae RCV001065388 SCV001230344 uncertain significance Familial cancer of breast 2024-01-09 criteria provided, single submitter clinical testing This sequence change replaces tyrosine, which is neutral and polar, with histidine, which is basic and polar, at codon 220 of the CHEK2 protein (p.Tyr220His). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CHEK2-related conditions. ClinVar contains an entry for this variant (Variation ID: 481714). 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. 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.
Quest Diagnostics Nichols Institute San Juan Capistrano RCV003478234 SCV004221751 uncertain significance not provided 2022-10-17 criteria provided, single submitter clinical testing The variant has not been reported in the published literature. It also has not been reported in large, multi-ethnic general populations (http://gnomad.broadinstitute.org). Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. Based on the available information, we are unable to determine the clinical significance of this variant.

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