ClinVar Miner

Submissions for variant NM_172107.4(KCNQ2):c.844G>C (p.Asp282His)

dbSNP: rs796052636
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000494319 SCV000583190 pathogenic not provided 2020-08-31 criteria provided, single submitter clinical testing Not observed in large population cohorts (Lek et al., 2016); Missense variants in this gene are often considered pathogenic (Stenson et al., 2014); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 29655203)
Invitae RCV001203282 SCV001374439 likely pathogenic Early infantile epileptic encephalopathy with suppression bursts 2022-11-29 criteria provided, single submitter clinical testing In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant disrupts the p.Arg282 amino acid residue in KCNQ2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 25533962, 28133863). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt KCNQ2 protein function. ClinVar contains an entry for this variant (Variation ID: 430396). This missense change has been observed in individual(s) with epilepsy and/or a neurodevelopmental disorder (PMID: 29655203). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces aspartic acid, which is acidic and polar, with histidine, which is basic and polar, at codon 282 of the KCNQ2 protein (p.Asp282His).
Channelopathy-Associated Epilepsy Research Center RCV003315349 SCV004015089 not provided Complex neurodevelopmental disorder no assertion provided literature only

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