ClinVar Miner

Submissions for variant NM_000238.4(KCNH2):c.2707G>C (p.Gly903Arg)

dbSNP: rs199473669
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001233742 SCV001406351 uncertain significance Long QT syndrome 2022-02-05 criteria provided, single submitter clinical testing This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 903 of the KCNH2 protein (p.Gly903Arg). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of KCNH2-related conditions (PMID: 19716085, 27000522, 30847666, 31737537). ClinVar contains an entry for this variant (Variation ID: 960253). 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 tolerated. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on KCNH2 function (PMID: 31557540, 34002542). 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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