ClinVar Miner

Submissions for variant NM_172107.4(KCNQ2):c.631A>G (p.Met211Val)

dbSNP: rs1057524599
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000434548 SCV000536018 likely pathogenic not provided 2022-06-10 criteria provided, single submitter clinical testing Not observed at significant frequency in large population cohorts (gnomAD); Missense variants in this gene are often considered pathogenic (HGMD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge
Invitae RCV001865397 SCV002304703 likely pathogenic Early infantile epileptic encephalopathy with suppression bursts 2022-07-15 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.Met211 amino acid residue in KCNQ2. Other variant(s) that disrupt this residue have been determined to be pathogenic (Invitae). 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: 392705). This missense change has been observed in individual(s) with clinical features of KCNQ2-related conditions (Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 211 of the KCNQ2 protein (p.Met211Val).

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