ClinVar Miner

Submissions for variant NM_005477.3(HCN4):c.673G>C (p.Gly225Arg)

dbSNP: rs767982466
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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 RCV002020404 SCV002290892 uncertain significance Brugada syndrome 8 2021-04-08 criteria provided, single submitter clinical testing This sequence change replaces glycine with arginine at codon 225 of the HCN4 protein (p.Gly225Arg). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and arginine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with HCN4-related conditions. 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 HCN4 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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