ClinVar Miner

Submissions for variant NM_000334.4(SCN4A):c.4558G>A (p.Glu1520Lys)

dbSNP: rs898253712
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV002006727 SCV002296856 uncertain significance Hyperkalemic periodic paralysis 2023-11-27 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 1520 of the SCN4A protein (p.Glu1520Lys). This variant is present in population databases (no rsID available, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with SCN4A-related conditions. ClinVar contains an entry for this variant (Variation ID: 1506429). 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 SCN4A protein function. Experimental studies have shown that this missense change affects SCN4A function (PMID: 29605429). 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.
Fulgent Genetics, Fulgent Genetics RCV005025634 SCV005651703 uncertain significance Potassium-aggravated myotonia; Paramyotonia congenita of Von Eulenburg; Hypokalemic periodic paralysis, type 2; Hyperkalemic periodic paralysis; Congenital myasthenic syndrome 16; Congenital myopathy 22A, classic; Congenital myopathy 22B, severe fetal 2024-01-24 criteria provided, single submitter clinical testing

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