ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.33367G>A (p.Ala11123Thr)

gnomAD frequency: 0.00016  dbSNP: rs200321239
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Total submissions: 5
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Eurofins Ntd Llc (ga) RCV000184460 SCV000702591 uncertain significance not provided 2016-10-12 criteria provided, single submitter clinical testing
Invitae RCV000643870 SCV000765557 uncertain significance Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2018-01-01 criteria provided, single submitter clinical testing
ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories RCV000184460 SCV003799453 uncertain significance not provided 2022-04-21 criteria provided, single submitter clinical testing The TTN c.33367G>A; p.Ala11123Thr variant (rs200321239; ClinVar Variation ID: 202579) is rare in the general population (<0.2% allele frequency in the Genome Aggregation Database) and has not been reported in the medical literature in association with dilated cardiomyopathy (DCM) or other TTN-related disease. The clinical relevance of rare missense variants in this gene, which are identified on average once per individual sequenced in affected populations (Herman 2012), is not well understood. Yet, evidence suggests that the vast majority of such missense variants do not contribute to the clinical outcome of DCM (Begay 2015). Thus, the clinical significance of the p.Ala11123Thr variant cannot be determined with certainty.
Revvity Omics, Revvity RCV000184460 SCV003823568 uncertain significance not provided 2022-09-27 criteria provided, single submitter clinical testing
GeneDx RCV000184460 SCV000237095 not provided not provided 2014-02-12 no assertion provided clinical testing Missense variants in the TTN gene are considered 'unclassified' if they are not previously reported in the literature and do not have >1% frequency in the population to be considered a polymorphism. Research indicates that truncating mutations in the TTN gene are expected to account for approximately 25% of familial and 18% of sporadic idiopathic DCM; however, truncating variants in the TTN gene have been reported in approximately 3% of reported control alleles. There has been little investigation into non-truncating variants. (Herman D et al. Truncations of titin causing dilated cardiomyopathy. N Eng J Med 366:619-628, 2012) The variant is found in DCM-CRDM panel(s).

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