ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.107840T>C (p.Ile35947Thr)

dbSNP: rs281864928
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV001061853 SCV001226612 uncertain significance Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2023-12-31 criteria provided, single submitter clinical testing This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 35947 of the TTN protein (p.Ile35947Thr). This variant is present in population databases (rs281864928, gnomAD 0.0009%). 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: 56386). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Not Available"; Align-GVGD: "Not Available". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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). This variant disrupts the p.Ile35947 amino acid residue in TTN. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 12891679, 25739468, 25877298, 27796757; Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. 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.
Revvity Omics, Revvity RCV003137590 SCV003819691 uncertain significance not provided 2021-09-07 criteria provided, single submitter clinical testing
Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM) RCV000049799 SCV000082208 probable-pathogenic Tibial muscular dystrophy no assertion criteria provided not provided Converted during submission to Likely pathogenic.

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