ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.101503C>T (p.Arg33835Cys)

gnomAD frequency: 0.00001  dbSNP: rs781516399
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001297180 SCV001486166 uncertain significance Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2020-09-17 criteria provided, single submitter clinical testing This sequence change replaces arginine with cysteine at codon 33835 of the TTN protein (p.Arg33835Cys). There is a large physicochemical difference between arginine and cysteine. This variant is present in population databases (rs781516399, ExAC 0.01%). This variant has not been reported in the literature in individuals with TTN-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are unavailable for the TTN gene. 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. This variant is located in the M band of TTN (PMID: 25589632). Variants in this region may be relevant for neuromuscular disorders, but have not been definitively shown to cause cardiomyopathy (PMID: 23975875).

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