ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.103216G>A (p.Gly34406Arg)

gnomAD frequency: 0.00001  dbSNP: rs371753532
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV000696273 SCV000824825 uncertain significance Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2024-01-03 criteria provided, single submitter clinical testing This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 34406 of the TTN protein (p.Gly34406Arg). This variant is present in population databases (rs371753532, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with TTN-related conditions. ClinVar contains an entry for this variant (Variation ID: 574355). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant is located in the M band of TTN (PMID: 25589632). Non-truncating variants in this region may be relevant for neuromuscular disorders, but have not been definitively shown to cause cardiomyopathy (PMID: 23975875). 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.
GeneDx RCV002284429 SCV002574134 uncertain significance not provided 2022-03-17 criteria provided, single submitter clinical testing Not observed at significant frequency in large population cohorts (gnomAD); Missense variant in a gene in which most reported pathogenic variants are truncating/loss-of-function; Has not been previously published as pathogenic or benign to our knowledge
Ambry Genetics RCV002388268 SCV002673742 uncertain significance Cardiovascular phenotype 2018-08-29 criteria provided, single submitter clinical testing The p.G25341R variant (also known as c.76021G>A), located in coding exon 185 of the TTN gene, results from a G to A substitution at nucleotide position 76021. The glycine at codon 25341 is replaced by arginine, an amino acid with dissimilar properties. This amino acid position is well conserved in available vertebrate species; however, arginine is the reference amino acid in other 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.
Fulgent Genetics, Fulgent Genetics RCV002477582 SCV002792177 uncertain significance Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J; Tibial muscular dystrophy; Myopathy, myofibrillar, 9, with early respiratory failure; Early-onset myopathy with fatal cardiomyopathy; Hypertrophic cardiomyopathy 9 2021-07-09 criteria provided, single submitter clinical testing

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