Submissions for variant NM_001267550.2(TTN):c.47998G>C (p.Asp16000His)

gnomAD frequency: 0.00051  dbSNP: rs201388509

Total submissions: 16

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
GeneDx	RCV000725808	SCV000237226	likely benign	not provided	2021-04-30	criteria provided, single submitter	clinical testing	This variant is associated with the following publications: (PMID: 26272908, 23396983)
Invitae	RCV001082934	SCV000286689	likely benign	Dilated cardiomyopathy 1G; Autosomal recessive limb-girdle muscular dystrophy type 2J	2024-01-08	criteria provided, single submitter	clinical testing
Eurofins Ntd Llc (ga)	RCV000725808	SCV000701146	uncertain significance	not provided	2017-11-17	criteria provided, single submitter	clinical testing
Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	RCV000591920	SCV000710956	uncertain significance	not specified	2016-04-25	criteria provided, single submitter	clinical testing	Variant classified as Uncertain Significance - Favor Benign. The p.Asp13432His v ariant in TTN has not been previously reported in individuals with cardiomyopath y, but has been identified in 0.18% (117/66584) of European chromosomes by the E xome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs20138 8509). Computational prediction tools and conservation analysis do not provide s trong support for or against an impact to the protein. In summary, while the cli nical significance of the p.Asp13432His variant is uncertain, its frequency sugg ests that it is more likely to be benign.
Ambry Genetics	RCV000621855	SCV000736925	likely benign	Cardiovascular phenotype	2020-04-03	criteria provided, single submitter	clinical testing	This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.
Illumina Laboratory Services, Illumina	RCV001128984	SCV001288480	uncertain significance	Early-onset myopathy with fatal cardiomyopathy	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV001128985	SCV001288481	uncertain significance	Dilated cardiomyopathy 1G	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV001128986	SCV001288482	uncertain significance	Autosomal recessive limb-girdle muscular dystrophy type 2J	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV001128987	SCV001288483	benign	Tibial muscular dystrophy	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.
Illumina Laboratory Services, Illumina	RCV001128988	SCV001288484	benign	Myopathy, myofibrillar, 9, with early respiratory failure	2018-01-12	criteria provided, single submitter	clinical testing	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.
Women's Health and Genetics/Laboratory Corporation of America, LabCorp	RCV000591920	SCV002600797	likely benign	not specified	2022-10-28	criteria provided, single submitter	clinical testing	Variant summary: TTN c.40294G>C (p.Asp13432His) results in a non-conservative amino acid change located in the A-band region of the encoded protein sequence. Three of four in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00085 in 247398 control chromosomes. The observed variant frequency is approximately 2 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 benign. c.40294G>C has been reported in the literature in one infant with SIDS (Santori_2015) and two individuals with Hypertrophic Cardiomyopathy (Lopes_2013) without strong evidence for causality in all instances. These reports do not provide unequivocal conclusions about association of the variant with Dilated Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Seven clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. These laboratories classified as VUS (n=3), likely benign (n=3) and benign (n=1) . Based on the evidence outlined above, the variant was classified as likely benign.
CeGaT Center for Human Genetics Tuebingen	RCV000725808	SCV003916190	likely benign	not provided	2023-08-01	criteria provided, single submitter	clinical testing	TTN: BP4
PreventionGenetics, part of Exact Sciences	RCV004537546	SCV004725855	likely benign	TTN-related disorder	2022-05-02	criteria provided, single submitter	clinical testing	This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).
Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	RCV000725808	SCV001742932	likely benign	not provided		no assertion criteria provided	clinical testing
Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	RCV000725808	SCV001797819	likely benign	not provided		no assertion criteria provided	clinical testing
Clinical Genetics, Academic Medical Center	RCV000591920	SCV001917420	benign	not specified		no assertion criteria provided	clinical testing