ClinVar Miner

Submissions for variant NM_016203.4(PRKAG2):c.661A>G (p.Thr221Ala)

dbSNP: rs1832761436
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Color Diagnostics, LLC DBA Color Health RCV001185949 SCV001352260 uncertain significance Cardiomyopathy 2020-02-11 criteria provided, single submitter clinical testing This missense variant replaces threonine with alanine at codon 221 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). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has not been identified 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.
Labcorp Genetics (formerly Invitae), Labcorp RCV003770073 SCV004686868 uncertain significance Lethal congenital glycogen storage disease of heart 2022-11-11 criteria provided, single submitter clinical testing This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 221 of the PRKAG2 protein (p.Thr221Ala). 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: 924574). This variant has not been reported in the literature in individuals affected with PRKAG2-related conditions. This variant is not present in population databases (gnomAD no frequency).

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