ClinVar Miner

Submissions for variant NM_000744.7(CHRNA4):c.682G>A (p.Glu228Lys)

dbSNP: rs1064795157
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000479131 SCV000570682 uncertain significance not provided 2024-10-01 criteria provided, single submitter clinical testing Not observed at significant frequency in large population cohorts (gnomAD); 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
Labcorp Genetics (formerly Invitae), Labcorp RCV001851210 SCV002139205 uncertain significance Autosomal dominant nocturnal frontal lobe epilepsy 2022-11-04 criteria provided, single submitter clinical testing This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 228 of the CHRNA4 protein (p.Glu228Lys). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with CHRNA4-related conditions. ClinVar contains an entry for this variant (Variation ID: 421467). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on CHRNA4 protein function. 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.
Baylor Genetics RCV003147482 SCV003836266 uncertain significance Autosomal dominant nocturnal frontal lobe epilepsy 1 2022-02-08 criteria provided, single submitter clinical testing

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