ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.39895+1G>A

dbSNP: rs749931280
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Eurofins Ntd Llc (ga) RCV000592493 SCV000704318 uncertain significance not provided 2017-01-03 criteria provided, single submitter clinical testing
Labcorp Genetics (formerly Invitae), Labcorp RCV003767367 SCV004578844 likely pathogenic Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2023-12-14 criteria provided, single submitter clinical testing This sequence change affects a donor splice site in intron 211 of the TTN gene. It is expected to disrupt RNA splicing and likely results in a truncated or disrupted TTN protein. This variant is present in population databases (rs749931280, gnomAD 0.0009%). Disruption of this splice site has been observed in individual(s) with autosomal recessive congenital myopathy (Invitae). This variant has been reported in individual(s) with autosomal dominant cardiomyopathy (Invitae); however, the role of the variant in this condition is currently unclear. ClinVar contains an entry for this variant (Variation ID: 499026). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. This variant is located in the I band of TTN (PMID: 25589632). Truncating variants in this region have been reported in individuals affected with autosomal recessive centronuclear myopathy (PMID: 23975875). Truncating variants in this region have also been identified in individuals affected with autosomal dominant dilated cardiomyopathy and/or cardio-related conditions (PMID: 27869827, 32964742). 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.

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