ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.24505+13C>T

gnomAD frequency: 0.00012  dbSNP: rs534803807
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Total submissions: 9
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine RCV000214424 SCV000270993 likely benign not specified 2015-10-01 criteria provided, single submitter clinical testing c.20773+13C>T in intron 81 of TTN: This variant is not expected to have clinica l significance because a C>T change at this position does not diverge from the s plice consensus sequence and is therefore unlikely to impact splicing. It has be en identified in 0.2% (15/8606) of East Asian chromosomes by the Exome Aggregati on Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs534803807).
PreventionGenetics, part of Exact Sciences RCV000214424 SCV000315427 likely benign not specified criteria provided, single submitter clinical testing
GeneDx RCV000214424 SCV000730349 benign not specified 2017-03-09 criteria provided, single submitter clinical testing This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV000214424 SCV001821439 benign not specified 2021-08-30 criteria provided, single submitter clinical testing Variant summary: TTN c.20773+13C>T alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00023 in 247558 control chromosomes, predominantly at a frequency of 0.0017 within the East Asian subpopulation in the gnomAD database. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 4.35 fold of the estimated maximal expected allele frequency for a pathogenic variant in TTN causing Dilated Cardiomyopathy phenotype (0.00039), strongly suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. To our knowledge, no occurrence of c.20773+13C>T in individuals affected with Dilated Cardiomyopathy and no experimental evidence demonstrating its impact on protein function have been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign.
Genome-Nilou Lab RCV001840345 SCV002099784 benign Autosomal recessive limb-girdle muscular dystrophy type 2J 2021-09-10 criteria provided, single submitter clinical testing
Genome-Nilou Lab RCV001840346 SCV002099785 benign Myopathy, myofibrillar, 9, with early respiratory failure 2021-09-10 criteria provided, single submitter clinical testing
Genome-Nilou Lab RCV001840347 SCV002099786 benign Early-onset myopathy with fatal cardiomyopathy 2021-09-10 criteria provided, single submitter clinical testing
Genome-Nilou Lab RCV001840344 SCV002099787 benign Tibial muscular dystrophy 2021-09-10 criteria provided, single submitter clinical testing
Invitae RCV002057154 SCV002472446 likely benign Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J 2024-01-12 criteria provided, single submitter clinical testing

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