ClinVar Miner

Submissions for variant NM_000238.3(KCNH2):c.2053C>T (p.Arg685Cys) (rs778135438)

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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Center for Human Genetics and Laboratory Diagnostics, Dr. Klein, Dr. Rost and Colleagues RCV000519050 SCV000616611 likely pathogenic Long QT syndrome 2 2017-05-24 criteria provided, single submitter clinical testing
Invitae RCV000631573 SCV000752655 uncertain significance Long QT syndrome 2017-10-26 criteria provided, single submitter clinical testing This sequence change replaces arginine with cysteine at codon 685 of the KCNH2 protein (p.Arg685Cys). The arginine residue is highly conserved and there is a large physicochemical difference between arginine and cysteine. This variant is present in population databases (rs778135438, ExAC 0.01%). This variant has not been reported in the literature in individuals with KCNH2-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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.

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