ClinVar Miner

Submissions for variant NM_000814.6(GABRB3):c.923T>G (p.Met308Arg)

dbSNP: rs746425161
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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 RCV001907646 SCV002128901 pathogenic Epilepsy, childhood absence, susceptibility to, 1; Epilepsy, childhood absence, susceptibility to, 5 2021-06-28 criteria provided, single submitter clinical testing This sequence change replaces methionine with arginine at codon 308 of the GABRB3 protein (p.Met308Arg). The methionine residue is moderately conserved and there is a moderate physicochemical difference between methionine and arginine. This variant is not present in population databases (ExAC no frequency). This variant has been observed in individual(s) with GABRB3-related conditions (Invitae). In at least one individual the variant was observed to be de novo. 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 GABRB3 protein function. For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies.

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