ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.69821G>A (p.Gly23274Asp) (rs201043950)

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Total submissions: 15
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Laboratory for Molecular Medicine,Partners HealthCare Personalized Medicine RCV000040547 SCV000064238 uncertain significance not specified 2014-09-25 criteria provided, single submitter clinical testing Variant classified as Uncertain Significance - Favor Benign. The Gly20706Asp var iant in TTN has been identified by our laboratory in 1 Caucasian adult with DCM and LBBB and 1 Caucasian adult with ARVC (Pugh 2014; LMM unpublished data). In a ddition, this variant has been identified in 0.2% (19/8258) of European American chromosomes by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu /EVS/; dbSNP rs201043950). Computational prediction tools and conservation analy sis do not provide strong support for or against an impact to the protein. In su mmary, while the clinical significance of the Gly20706Asp variant is uncertain, its frequency suggests that it is more likely to be benign.
GeneDx RCV000040547 SCV000237475 likely benign not specified 2017-10-30 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.
Invitae RCV001086284 SCV000286806 likely benign Dilated cardiomyopathy 1G; Limb-girdle muscular dystrophy, type 2J 2020-12-04 criteria provided, single submitter clinical testing
Ambry Genetics RCV000251867 SCV000318261 uncertain significance Cardiovascular phenotype 2013-02-14 criteria provided, single submitter clinical testing There is insufficient or conflicting evidence for classification of this alteration.
EGL Genetic Diagnostics, Eurofins Clinical Diagnostics RCV000714083 SCV000333328 uncertain significance not provided 2015-07-21 criteria provided, single submitter clinical testing
Ambry Genetics RCV000624790 SCV000742433 uncertain significance Inborn genetic diseases 2017-04-20 criteria provided, single submitter clinical testing Lines of evidence used in support of classification: NEGATIVE - No Relevant Alterations Detected (Step 2)
Athena Diagnostics Inc RCV000714083 SCV000844750 benign not provided 2018-08-13 criteria provided, single submitter clinical testing
CeGaT Praxis fuer Humangenetik Tuebingen RCV000714083 SCV001152784 uncertain significance not provided 2019-12-01 criteria provided, single submitter clinical testing
ARUP Laboratories, Molecular Genetics and Genomics,ARUP Laboratories RCV000040547 SCV001157287 uncertain significance not specified 2019-06-11 criteria provided, single submitter clinical testing The TTN c.69821G>A; p.Gly23274Asp variant (rs201043950; ClinVar Variation ID: 47277) is rare in the general population (<1% allele frequency in the Genome Aggregation Database) and has only been reported in the medical literature in association with dilated cardiomyopathy (DCM) or other TTN-related disease in two individuals from large sequencing cohorts (Lopes 2013, Pugh 2014). 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.Gly23274Asp variant cannot be determined with certainty. References: Begay RL et al. Role of Titin Missense Variants in Dilated Cardiomyopathy. J Am Heart Assoc. 2015 Nov 13;4(11). Herman DS et al. Truncations of titin causing dilated cardiomyopathy. N Engl J Med. 2012 Feb 16;366(7):619-28. Lopes LR et al. Genetic complexity in hypertrophic cardiomyopathy revealed by high-throughput sequencing. J Med Genet. 2013 Apr;50(4):228-39. Pugh TJ et al. The landscape of genetic variation in dilated cardiomyopathy as surveyed by clinical DNA sequencing. Genet Med. 2014 Aug;16(8):601-8.
Illumina Clinical Services Laboratory,Illumina RCV001133870 SCV001293584 uncertain significance Myopathy, early-onset, 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 Clinical Services Laboratory,Illumina RCV001133871 SCV001293585 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 Clinical Services Laboratory,Illumina RCV001133872 SCV001293586 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 Clinical Services Laboratory,Illumina RCV001133873 SCV001293587 uncertain significance 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 Clinical Services Laboratory,Illumina RCV001133874 SCV001293588 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.
Baylor Genetics RCV001133874 SCV001526076 uncertain significance Myopathy, myofibrillar, 9, with early respiratory failure 2018-04-05 criteria provided, single submitter clinical testing This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868].

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