ClinVar Miner

Submissions for variant NM_001165963.4(SCN1A):c.5765T>G (p.Ile1922Ser)

dbSNP: rs121917981
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000466422 SCV000548778 pathogenic Early infantile epileptic encephalopathy with suppression bursts 2023-07-06 criteria provided, single submitter clinical testing This sequence change replaces isoleucine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 1922 of the SCN1A protein (p.Ile1922Ser). This variant is not present in population databases (gnomAD no frequency). For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Ile992 amino acid residue in SCN1A. Other variant(s) that disrupt this residue have been observed in individuals with SCN1A-related conditions (PMID: 17347258, 23895530), which suggests that this may be a clinically significant amino acid residue. 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 SCN1A protein function. ClinVar contains an entry for this variant (Variation ID: 408935). This missense change has been observed in individual(s) with clinical features of SCN1A-related conditions (Invitae). In at least one individual the variant was observed to be de novo.

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