Submissions for variant NM_001267550.2(TTN):c.30598+15C>T

gnomAD frequency: 0.00156  dbSNP: rs79685525

Total submissions: 10

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	RCV000152379	SCV000201335	benign	not specified	2012-03-19	criteria provided, single submitter	clinical testing	c.26866+15C>T in Intron 107 of TTN: This variant is not expected to have clinica l significance because it is not located within the splice consensus sequence an d has been identified in 0.7% (22/3270) of African American chromosomes from a b road population by the NHLBI Exome Sequencing Project (http://evs.gs.washington. edu/EVS; dbSNP rs79685525).
GeneDx	RCV000152379	SCV000236631	benign	not specified	2014-11-03	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	RCV000152379	SCV001478816	benign	not specified	2021-01-28	criteria provided, single submitter	clinical testing	Variant summary: TTN c.26866+15C>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 0.00047 in 244436 control chromosomes, predominantly at a frequency of 0.0066 within the African or African-American subpopulation in the gnomAD database, including 1 homozygote. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 17 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 African or African-American origin. To our knowledge, no occurrence of c.26866+15C>T in individuals affected with Dilated Cardiomyopathy and no experimental evidence demonstrating its impact on protein function have been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as benign.
Genome-Nilou Lab	RCV001840096	SCV002101855	benign	Autosomal recessive limb-girdle muscular dystrophy type 2J	2021-09-10	criteria provided, single submitter	clinical testing
Genome-Nilou Lab	RCV001840097	SCV002101856	benign	Myopathy, myofibrillar, 9, with early respiratory failure	2021-09-10	criteria provided, single submitter	clinical testing
Genome-Nilou Lab	RCV001840098	SCV002101857	benign	Early-onset myopathy with fatal cardiomyopathy	2021-09-10	criteria provided, single submitter	clinical testing
Genome-Nilou Lab	RCV001840095	SCV002101858	benign	Tibial muscular dystrophy	2021-09-10	criteria provided, single submitter	clinical testing
Labcorp Genetics (formerly Invitae), Labcorp	RCV002056014	SCV002406975	benign	Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J	2025-01-31	criteria provided, single submitter	clinical testing
Clinical Genetics, Academic Medical Center	RCV000152379	SCV001923053	benign	not specified		no assertion criteria provided	clinical testing
Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	RCV001727601	SCV001968691	likely benign	not provided		no assertion criteria provided	clinical testing