ClinVar Miner

Submissions for variant NM_001267550.2(TTN):c.83516G>A (p.Arg27839Gln) (rs376820301)

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Total submissions: 12
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
GeneDx RCV000259119 SCV000237647 likely benign not specified 2017-06-27 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 RCV001081800 SCV000286867 likely benign Dilated cardiomyopathy 1G; Limb-girdle muscular dystrophy, type 2J 2019-12-31 criteria provided, single submitter clinical testing
Ambry Genetics RCV000242513 SCV000318050 uncertain significance Cardiovascular phenotype 2013-01-29 criteria provided, single submitter clinical testing Insufficient or inconclusive evidence
EGL Genetic Diagnostics,Eurofins Clinical Diagnostics RCV000487528 SCV000333174 uncertain significance not provided 2015-07-15 criteria provided, single submitter clinical testing
Illumina Clinical Services Laboratory,Illumina RCV000366970 SCV000421267 uncertain significance Myopathy, early-onset, with fatal cardiomyopathy 2018-01-13 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 RCV000274523 SCV000421268 uncertain significance Limb-girdle muscular dystrophy, type 2J 2018-01-13 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 RCV000299241 SCV000421269 uncertain significance Dilated cardiomyopathy 1G 2018-01-13 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 RCV000259353 SCV000421271 benign Myopathy, myofibrillar, 9, with early respiratory failure 2018-01-13 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 RCV000317203 SCV000421272 benign Tibial muscular dystrophy 2018-01-13 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.
CeGaT Praxis fuer Humangenetik Tuebingen RCV000487528 SCV000575274 uncertain significance not provided 2016-11-30 criteria provided, single submitter clinical testing
Center for Advanced Laboratory Medicine, UC San Diego Health,University of California San Diego RCV000356458 SCV000995531 likely benign Hypertrophic cardiomyopathy 2018-12-24 criteria provided, single submitter clinical testing
Integrated Genetics/Laboratory Corporation of America RCV000259119 SCV001337743 likely benign not specified 2020-01-06 criteria provided, single submitter clinical testing Variant summary: TTN c.75812G>A (p.Arg25271Gln) results in a conservative amino acid change located in the A-band region of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00042 in 245148 control chromosomes, predominantly at a frequency of 0.0011 within the East Asian subpopulation in the gnomAD database. The observed variant frequency within East Asian control individuals in the gnomAD database is approximately 1.76-fold the estimated maximal expected allele frequency for a pathogenic variant in TTN causing Cardiomyopathy phenotype (0.00063), suggesting that the variant is a benign polymorphism found primarily in populations of East Asian origin. c.75812G>A has been reported in the literature in individuals affected with Cardiomyopathy (e.g. Haas_2015) and Hirschsprung Disease (e.g. Luzon-Toro_2015) without strong evidence for causality. These reports do not provide unequivocal conclusions about association of the variant with Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six ClinVar submitters (evaluation after 2014) have cited the variant as likely benign (n=3) and uncertain significance (n=3). Based on the evidence outlined above, the variant was classified as likely benign.

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