rs149059189
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 1P and 5B. PP2BP4_StrongBP6
The NM_001267550.2(TTN):c.41488G>A(p.Val13830Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000781 in 1,613,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_001267550.2 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
TTN | NM_001267550.2 | c.41488G>A | p.Val13830Ile | missense_variant | 226/363 | ENST00000589042.5 | NP_001254479.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
TTN | ENST00000589042.5 | c.41488G>A | p.Val13830Ile | missense_variant | 226/363 | 5 | NM_001267550.2 | ENSP00000467141.1 |
Frequencies
GnomAD3 genomes AF: 0.000401 AC: 61AN: 152008Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000105 AC: 26AN: 248378Hom.: 0 AF XY: 0.0000891 AC XY: 12AN XY: 134738
GnomAD4 exome AF: 0.0000445 AC: 65AN: 1461124Hom.: 0 Cov.: 32 AF XY: 0.0000358 AC XY: 26AN XY: 726842
GnomAD4 genome AF: 0.000401 AC: 61AN: 152126Hom.: 0 Cov.: 32 AF XY: 0.000417 AC XY: 31AN XY: 74368
ClinVar
Submissions by phenotype
not provided Uncertain:1Benign:3
Uncertain significance, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jun 11, 2015 | - - |
Likely benign, criteria provided, single submitter | clinical testing | GeneDx | Jun 02, 2020 | - - |
Likely benign, criteria provided, single submitter | clinical testing | Athena Diagnostics | Oct 30, 2018 | - - |
Likely benign, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Apr 04, 2023 | - - |
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Sep 25, 2013 | The p.V11262I variant (also known as c.33784G>A) is located in coding exon 174 of the TTN gene. This alteration results from a G to A substitution at nucleotide position 33784. The valine at codon 11262 is replaced by isoleucine, an amino acid with highly similar properties. ​ ​This variant was previously reported in the SNPDatabase as rs149059189. Based on data from the NHLBI Exome Sequencing Project (ESP), the A-allele has an overall frequency of approximately 0.04% (5/12,442), having been observed in 0.12% (5/4078) of African American alleles, and not observed in 8364 European American alleles studied. Based on data from the 1000 Genomes Project, the A-allele has an overall frequency of approximately 0.05% (1/2184). The highest observed frequency was 0.52% (1/194) Luhya chromosomes studied. This amino acid position is poorly conserved in available vertebrate species. This variant is predicted to be benign by PolyPhen in silico analyses. Since supporting evidence is limited at this time, the clinical significance of p.V11262I remains unclear. - |
not specified Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Nov 20, 2023 | Variant summary: TTN c.33784G>A (p.Val11262Ile) results in a conservative amino acid change located in the I-band region of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0001 in 248378 control chromosomes, predominantly at a frequency of 0.0012 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 3-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.33784G>A in individuals affected with Dilated Cardiomyopathy and no experimental evidence demonstrating its impact on protein function have been reported. Six submitters have reported clinical-significance assessments for this variant to ClinVar after 2014. Multiple submitters reported the variant with conflicting assessments (benign, n = 1; likely benign, n = 3; uncertain significance, n = 2). Based on the evidence outlined above, the variant was classified as likely benign. - |
TTN-related disorder Benign:1
Likely benign, no assertion criteria provided | clinical testing | PreventionGenetics, part of Exact Sciences | Mar 13, 2024 | 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). - |
Autosomal recessive limb-girdle muscular dystrophy type 2J;C1858763:Dilated cardiomyopathy 1G Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 31, 2024 | - - |
Cardiomyopathy Benign:1
Benign, criteria provided, single submitter | clinical testing | CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario | May 08, 2020 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at