rs727503536
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate
The NM_001267550.2(TTN):āc.100980G>Cā(p.Glu33660Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,504 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 Uncertain significance (ā ā ). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E33660V) has been classified as Uncertain significance.
Frequency
Consequence
NM_001267550.2 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 1 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TTN | NM_001267550.2 | c.100980G>C | p.Glu33660Asp | missense_variant | 358/363 | ENST00000589042.5 | |
TTN-AS1 | NR_038272.1 | n.220-97C>G | intron_variant, non_coding_transcript_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TTN | ENST00000589042.5 | c.100980G>C | p.Glu33660Asp | missense_variant | 358/363 | 5 | NM_001267550.2 | P1 | |
TTN-AS1 | ENST00000659121.1 | n.416+11999C>G | intron_variant, non_coding_transcript_variant |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461504Hom.: 0 Cov.: 38 AF XY: 0.00000138 AC XY: 1AN XY: 727052
GnomAD4 genome ? Cov.: 33
ClinVar
Submissions by phenotype
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Feb 27, 2014 | The Glu31092Asp variant in TTN has not been previously identified by our laborat ory, been reported in the literature, or identified in large population studies. Computational analyses (biochemical amino acid properties, conservation, AlignG VGD, PolyPhen2, and SIFT) suggest that the Glu31092Asp variant may not impact th e normal function of the protein. Many bird species have an Asp at this position of TTN, suggesting that this change might be tolerated. However, this informati on is not predictive enough to rule out pathogenicity. In summary, additional in formation is needed to fully assess the clinical significance of the Glu31092Asp variant. - |
Autosomal recessive limb-girdle muscular dystrophy type 2J;C1858763:Dilated cardiomyopathy 1G Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Feb 08, 2022 | This variant is located in the M band of TTN (PMID: 25589632). Variants in this region may be relevant for neuromuscular disorders, but have not been definitively shown to cause cardiomyopathy (PMID: 23975875). 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. This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 33660 of the TTN protein (p.Glu33660Asp). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with TTN-related conditions. ClinVar contains an entry for this variant (Variation ID: 165661). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at