ClinVar Miner

Submissions for variant NM_004519.4(KCNQ3):c.2492G>A (p.Arg831Gln)

gnomAD frequency: 0.00001  dbSNP: rs149004528
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Genetic Services Laboratory, University of Chicago RCV000194011 SCV000247671 uncertain significance not specified 2015-04-16 criteria provided, single submitter clinical testing
Invitae RCV000647891 SCV000769696 uncertain significance Benign neonatal seizures 2023-09-29 criteria provided, single submitter clinical testing 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. 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 not expected to disrupt KCNQ3 protein function. ClinVar contains an entry for this variant (Variation ID: 211238). This variant has not been reported in the literature in individuals affected with KCNQ3-related conditions. This variant is present in population databases (rs149004528, gnomAD 0.005%). This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 831 of the KCNQ3 protein (p.Arg831Gln).
Illumina Laboratory Services, Illumina RCV001164437 SCV001326564 likely benign Seizures, benign familial neonatal, 2 2018-01-12 criteria provided, single submitter clinical testing This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.

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