ClinVar Miner

Submissions for variant NM_000256.3(MYBPC3):c.2551G>A (p.Ala851Thr)

gnomAD frequency: 0.00001  dbSNP: rs730880571
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000158171 SCV000208106 uncertain significance not provided 2022-10-26 criteria provided, single submitter clinical testing Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge
Color Diagnostics, LLC DBA Color Health RCV001178353 SCV001342768 uncertain significance Cardiomyopathy 2023-06-08 criteria provided, single submitter clinical testing This missense variant replaces alanine with threonine at codon 851 of the MYBPC3 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 been reported in an individual affected with hypertrophic cardiomyopathy (PMID: 31941943). This variant has been identified in 2/246352 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.
Invitae RCV001345005 SCV001539100 uncertain significance Hypertrophic cardiomyopathy 2020-03-25 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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The threonine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with MYBPC3-related conditions. ClinVar contains an entry for this variant (Variation ID: 180977). This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with threonine at codon 851 of the MYBPC3 protein (p.Ala851Thr). The alanine residue is highly conserved and there is a small physicochemical difference between alanine and threonine.

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