ClinVar Miner

Submissions for variant NM_000069.3(CACNA1S):c.5550C>A (p.Asn1850Lys)

gnomAD frequency: 0.00006  dbSNP: rs141556780
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000535113 SCV000653730 uncertain significance Hypokalemic periodic paralysis, type 1; Malignant hyperthermia, susceptibility to, 5 2023-12-21 criteria provided, single submitter clinical testing This sequence change replaces asparagine, which is neutral and polar, with lysine, which is basic and polar, at codon 1850 of the CACNA1S protein (p.Asn1850Lys). This variant is present in population databases (rs141556780, gnomAD 0.04%). This missense change has been observed in individual(s) with malignant hyperthermia susceptibility (PMID: 28259615). ClinVar contains an entry for this variant (Variation ID: 474005). 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 not expected to disrupt CACNA1S 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.

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