ClinVar Miner

Submissions for variant NM_172107.4(KCNQ2):c.1023G>C (p.Gln341His)

dbSNP: rs2081071680
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001062129 SCV001226908 pathogenic Early infantile epileptic encephalopathy with suppression bursts 2022-07-19 criteria provided, single submitter clinical testing For these reasons, this variant has been classified as Pathogenic. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). 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"). ClinVar contains an entry for this variant (Variation ID: 856627). This missense change has been observed in individual(s) with early onset epilepsy (PMID: 28420012; Invitae). In at least one individual the variant was observed to be de novo. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamine, which is neutral and polar, with histidine, which is basic and polar, at codon 341 of the KCNQ2 protein (p.Gln341His). This variant also falls at the last nucleotide of exon 7, which is part of the consensus splice site for this exon.

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