ClinVar Miner

Submissions for variant NM_024334.3(TMEM43):c.231C>G (p.Ile77Met)

gnomAD frequency: 0.00004  dbSNP: rs899266809
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Color Diagnostics, LLC DBA Color Health RCV001175872 SCV001339658 uncertain significance Cardiomyopathy 2022-03-25 criteria provided, single submitter clinical testing This missense variant replaces isoleucine with methionine at codon 77 of the TMEM43 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 1/251104 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 RCV001368075 SCV001564452 uncertain significance Arrhythmogenic right ventricular dysplasia 5 2023-07-14 criteria provided, single submitter clinical testing This sequence change replaces isoleucine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 77 of the TMEM43 protein (p.Ile77Met). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with TMEM43-related conditions. ClinVar contains an entry for this variant (Variation ID: 918328). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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.
Ambry Genetics RCV002445416 SCV002735423 uncertain significance Cardiovascular phenotype 2021-02-09 criteria provided, single submitter clinical testing The p.I77M variant (also known as c.231C>G), located in coding exon 3 of the TMEM43 gene, results from a C to G substitution at nucleotide position 231. The isoleucine at codon 77 is replaced by methionine, an amino acid with highly 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.

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