ClinVar Miner

Submissions for variant NM_000083.3(CLCN1):c.691A>G (p.Lys231Glu)

dbSNP: rs1586486170
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000816296 SCV000956797 likely pathogenic Congenital myotonia, autosomal recessive form; Congenital myotonia, autosomal dominant form 2023-03-10 criteria provided, single submitter clinical testing In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. 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. ClinVar contains an entry for this variant (Variation ID: 659309). This missense change has been observed in individual(s) with autosomal recessive myotonia congenita (Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. This variant has been reported in individual(s) with autosomal dominant myotonia congenita (Invitae); however, the role of the variant in this condition is currently unclear. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 231 of the CLCN1 protein (p.Lys231Glu).
GeneDx RCV002298785 SCV002588091 uncertain significance not provided 2022-10-10 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

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