Total submissions: 4
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Blueprint Genetics | RCV000788224 | SCV000927267 | uncertain significance | not provided | 2017-05-18 | criteria provided, single submitter | clinical testing | |
| Invitae | RCV001345579 | SCV001539709 | uncertain significance | Brugada syndrome 8 | 2022-08-23 | criteria provided, single submitter | clinical testing | This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 869 of the HCN4 protein (p.Ala869Thr). This variant is present in population databases (rs775134377, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with HCN4-related conditions. ClinVar contains an entry for this variant (Variation ID: 636407). 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. |
| Gene |
RCV000788224 | SCV001999086 | uncertain significance | not provided | 2019-10-15 | criteria provided, single submitter | clinical testing | Has not been previously published as pathogenic or benign to our knowledge; Reported in ClinVar as a variant of uncertain significance by another clinical laboratory (ClinVar Variant ID#636407; Landrum et al., 2016); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function |
| Ambry Genetics | RCV002424784 | SCV002744494 | uncertain significance | Cardiovascular phenotype | 2021-02-25 | criteria provided, single submitter | clinical testing | The p.A869T variant (also known as c.2605G>A), located in coding exon 8 of the HCN4 gene, results from a G to A substitution at nucleotide position 2605. The alanine at codon 869 is replaced by threonine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. |