ClinVar Miner

Submissions for variant NM_000083.3(CLCN1):c.1966G>A (p.Glu656Lys)

dbSNP: rs1224200077
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001884955 SCV002158832 uncertain significance Congenital myotonia, autosomal recessive form; Congenital myotonia, autosomal dominant form 2022-03-26 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. Experimental studies have shown that this missense change does not substantially affect CLCN1 function (PMID: 14724190). 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 CLCN1 protein function. This variant has not been reported in the literature in individuals affected with CLCN1-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.004%). This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 656 of the CLCN1 protein (p.Glu656Lys).

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