rs878854335
Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_001267550.2(TTN):c.76179_76180insAACTTAGTGAACCAAGCCCTCCT(p.Ser25394AsnfsTer30) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,424 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. P25393P) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.
Frequency
Consequence
NM_001267550.2 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 18 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TTN | NM_001267550.2 | c.76179_76180insAACTTAGTGAACCAAGCCCTCCT | p.Ser25394AsnfsTer30 | frameshift_variant | 326/363 | ENST00000589042.5 | |
TTN-AS1 | NR_038272.1 | n.2044-12598_2044-12597insTAGGAGGGCTTGGTTCACTAAGT | intron_variant, non_coding_transcript_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TTN | ENST00000589042.5 | c.76179_76180insAACTTAGTGAACCAAGCCCTCCT | p.Ser25394AsnfsTer30 | frameshift_variant | 326/363 | 5 | NM_001267550.2 | P1 | |
TTN-AS1 | ENST00000659121.1 | n.417-27622_417-27621insTAGGAGGGCTTGGTTCACTAAGT | intron_variant, non_coding_transcript_variant |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome AF: 0.00000137 AC: 2AN: 1460424Hom.: 0 Cov.: 40 AF XY: 0.00000275 AC XY: 2AN XY: 726366
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Dilated cardiomyopathy 1G Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Mar 08, 2016 | This sequence change inserts 23 nucleotides in exon 326 of the TTN mRNA (c.76179_76180ins23), causing a frameshift at codon 25394. This creates a premature translational stop signal (p.Ser25394Asnfs*30) and is expected to result in an absent or disrupted protein product. This variant is found in the A-band of this gene. Truncating variants in the A-band of TTN are likely pathogenic (PMID: 25589632). This particular variant has been already found in an individual with personal and family history of dilated cardiomyopathy (Invitae database). For these reasons, this variant has been classified as Pathogenic. - |
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute | Oct 27, 2016 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at