ClinVar Miner

Submissions for variant NM_001127222.2(CACNA1A):c.1439G>A (p.Arg480His)

gnomAD frequency: 0.00001  dbSNP: rs761827501
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV001761193 SCV001998783 uncertain significance not provided 2022-09-14 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
Labcorp Genetics (formerly Invitae), Labcorp RCV003772016 SCV004579315 uncertain significance Episodic ataxia type 2; Developmental and epileptic encephalopathy, 42 2023-09-03 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 481 of the CACNA1A protein (p.Arg481His). This variant is present in population databases (rs761827501, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with CACNA1A-related conditions. ClinVar contains an entry for this variant (Variation ID: 1311972). 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 CACNA1A protein function. 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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