ClinVar Miner

Submissions for variant NM_016203.4(PRKAG2):c.1255G>A (p.Ala419Thr)

gnomAD frequency: 0.00001  dbSNP: rs373919593
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001366027 SCV001562315 uncertain significance Lethal congenital glycogen storage disease of heart 2023-03-14 criteria provided, single submitter clinical testing 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. 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 PRKAG2 protein function. ClinVar contains an entry for this variant (Variation ID: 1057106). This variant has not been reported in the literature in individuals affected with PRKAG2-related conditions. This variant is present in population databases (rs373919593, gnomAD 0.0009%). This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 419 of the PRKAG2 protein (p.Ala419Thr).
Ambry Genetics RCV002420806 SCV002681166 uncertain significance Cardiovascular phenotype 2022-08-22 criteria provided, single submitter clinical testing The p.A419T variant (also known as c.1255G>A), located in coding exon 12 of the PRKAG2 gene, results from a G to A substitution at nucleotide position 1255. The alanine at codon 419 is replaced by threonine, an amino acid with similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Color Diagnostics, LLC DBA Color Health RCV003532963 SCV004359741 uncertain significance Cardiomyopathy 2023-11-03 criteria provided, single submitter clinical testing This missense variant replaces alanine with threonine at codon 419 of the PRKAG2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 2/251474 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

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