ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.98299del (p.Arg32767fs)

dbSNP: rs772061676
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001061945 SCV001226712 likely pathogenic Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2019-11-25 criteria provided, single submitter clinical testing In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant is located in the A band of TTN (PMID: 25589632). Truncating variants in this region are significantly overrepresented in patients affected with dilated cardiomyopathy (PMID: 25589632). Truncating variants in this region have also been reported in individuals affected with autosomal recessive centronuclear myopathy (PMID: 23975875). This variant has not been reported in the literature in individuals with TTN-related conditions. This variant is present in population databases (rs772061676, ExAC 0.001%). This sequence change results in a premature translational stop signal in the TTN gene (p.Arg32767Glyfs*26). While this is not anticipated to result in nonsense mediated decay, it is expected to create a truncated TTN protein.
GeneDx RCV002462303 SCV002757347 pathogenic not provided 2022-11-22 criteria provided, single submitter clinical testing Reported in individuals with left ventricular non-compaction (LVNC) in published literature (Richard et al., 2019; Cambon-Viala et al., 2021); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Located in the A-band region of TTN in which the majority of loss of function variants have been associated with autosomal dominant titinopathies (Herman et al., 2012); Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 30471092, 34819141, 22335739, 34088380)
Cardiogenetics and Myogenetics Molecular and Cellular Functional Unit, Aphp Sorbonne University-Hopital Pitie Salpetriere RCV004764953 SCV005375083 likely pathogenic Dilated cardiomyopathy 1G 2024-01-06 no assertion criteria provided clinical testing

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