ClinVar Miner

Submissions for variant NM_000334.4(SCN4A):c.2564T>C (p.Met855Thr)

gnomAD frequency: 0.00003  dbSNP: rs1346442665
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV000699965 SCV000828698 uncertain significance Hyperkalemic periodic paralysis 2024-11-14 criteria provided, single submitter clinical testing This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 855 of the SCN4A protein (p.Met855Thr). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 577263). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt SCN4A protein function with a negative predictive value of 95%. 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 RCV002477606 SCV002798288 uncertain significance Hypokalemic periodic paralysis, type 1; Potassium-aggravated myotonia; Paramyotonia congenita of Von Eulenburg; Hypokalemic periodic paralysis, type 2; Hyperkalemic periodic paralysis; Congenital myasthenic syndrome 16 2022-02-04 criteria provided, single submitter clinical testing
Revvity Omics, Revvity RCV003140109 SCV003818737 uncertain significance not provided 2019-07-12 criteria provided, single submitter clinical testing

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