17-39665993-C-T
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.
The NM_003673.4(TCAP):c.388C>T(p.Arg130Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00011 in 1,612,600 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R130H) has been classified as Uncertain significance.
Frequency
Consequence
NM_003673.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 0 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TCAP | NM_003673.4 | c.388C>T | p.Arg130Cys | missense_variant | 2/2 | ENST00000309889.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TCAP | ENST00000309889.3 | c.388C>T | p.Arg130Cys | missense_variant | 2/2 | 1 | NM_003673.4 | P1 | |
TCAP | ENST00000578283.1 | c.316C>T | p.Arg106Cys | missense_variant | 3/3 | 5 |
Frequencies
GnomAD3 genomes AF: 0.0000854 AC: 13AN: 152180Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.0000561 AC: 14AN: 249646Hom.: 0 AF XY: 0.0000813 AC XY: 11AN XY: 135374
GnomAD4 exome AF: 0.000112 AC: 164AN: 1460302Hom.: 0 Cov.: 31 AF XY: 0.000106 AC XY: 77AN XY: 726482
GnomAD4 genome AF: 0.0000854 AC: 13AN: 152298Hom.: 0 Cov.: 33 AF XY: 0.0000806 AC XY: 6AN XY: 74476
ClinVar
Submissions by phenotype
not provided Uncertain:6
Uncertain significance, criteria provided, single submitter | clinical testing | Athena Diagnostics | Nov 29, 2017 | - - |
Uncertain significance, no assertion criteria provided | clinical testing | Clinical Genetics, Academic Medical Center | - | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Aug 09, 2019 | Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 44708; Landrum et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 27532257, 24503780) - |
Uncertain significance, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Nov 01, 2016 | - - |
Uncertain significance, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jan 14, 2016 | - - |
Uncertain significance, no assertion criteria provided | clinical testing | Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen | - | - - |
not specified Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Jun 24, 2019 | Variant summary: TCAP c.388C>T (p.Arg130Cys) results in a non-conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 5.6e-05 in 249646 control chromosomes. The observed variant frequency is approximately 2 fold of the estimated maximal expected allele frequency for a pathogenic variant in TCAP causing Cardiomyopathy phenotype (2.5e-05), suggesting that the variant is benign. c.388C>T has been reported in the literature in individuals affected with Cardiomyopathy (Pugh_2014, Walsh_2017). 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. Five 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 uncertain significance. Based on the evidence outlined above, the variant was classified as VUS-possibly benign. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | May 10, 2011 | The Arg130Cys variant has not been reported in the literature. It has been dete cted together with another, pathogenic DCM variant in 1/>250 Caucasian probands tested by our laboratory. Because it has not yet been observed in isolation in a n affected individual, its clinical significance cannot be fully assessed. Argin ine (Arg) at amino acid position 130 is not conserved in evolutionary distant sp ecies (though frog and fish carry a lysine), reducing the likelihood that the ch ange is pathogenic. On the other hand, three computer tools (AlignGVGD, Polyphen 2, SIFT) predict this change to be deleterious although their accuracy has not b een clinically validated. In summary, additional data is needed to assess the cl inical significance of the Arg130Cys variant. - |
Cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario | Sep 13, 2017 | - - |
Hypertrophic cardiomyopathy 25 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | 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. - |
Primary familial hypertrophic cardiomyopathy;C4225408:Hypertrophic cardiomyopathy 25 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Dec 14, 2023 | This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 130 of the TCAP protein (p.Arg130Cys). This variant is present in population databases (rs374886575, gnomAD 0.03%). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 24503780, 27532257). ClinVar contains an entry for this variant (Variation ID: 44708). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Autosomal recessive limb-girdle muscular dystrophy type 2G Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | 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. - |
Autosomal recessive limb-girdle muscular dystrophy type 2G;C4225408:Hypertrophic cardiomyopathy 25 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Sep 12, 2021 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at