rs774910035
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PP2
The NM_001267550.2(TTN):c.57323G>A(p.Gly19108Glu) variant causes a missense change. The variant allele was found at a frequency of 0.0000253 in 1,461,030 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. G19108G) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.000025 ( 0 hom. )
Consequence
TTN
NM_001267550.2 missense
NM_001267550.2 missense
Scores
5
4
7
Clinical Significance
Conservation
PhyloP100: 4.90
Genes affected
TTN (HGNC:12403): (titin) This gene encodes a large abundant protein of striated muscle. The product of this gene is divided into two regions, a N-terminal I-band and a C-terminal A-band. The I-band, which is the elastic part of the molecule, contains two regions of tandem immunoglobulin domains on either side of a PEVK region that is rich in proline, glutamate, valine and lysine. The A-band, which is thought to act as a protein-ruler, contains a mixture of immunoglobulin and fibronectin repeats, and possesses kinase activity. An N-terminal Z-disc region and a C-terminal M-line region bind to the Z-line and M-line of the sarcomere, respectively, so that a single titin molecule spans half the length of a sarcomere. Titin also contains binding sites for muscle associated proteins so it serves as an adhesion template for the assembly of contractile machinery in muscle cells. It has also been identified as a structural protein for chromosomes. Alternative splicing of this gene results in multiple transcript variants. Considerable variability exists in the I-band, the M-line and the Z-disc regions of titin. Variability in the I-band region contributes to the differences in elasticity of different titin isoforms and, therefore, to the differences in elasticity of different muscle types. Mutations in this gene are associated with familial hypertrophic cardiomyopathy 9, and autoantibodies to titin are produced in patients with the autoimmune disease scleroderma. [provided by RefSeq, Feb 2012]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PP2
?
Missense variant where missense usually causes diseases, TTN
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TTN | NM_001267550.2 | c.57323G>A | p.Gly19108Glu | missense_variant | 294/363 | ENST00000589042.5 | |
TTN-AS1 | NR_038272.1 | n.3450+78C>T | intron_variant, non_coding_transcript_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TTN | ENST00000589042.5 | c.57323G>A | p.Gly19108Glu | missense_variant | 294/363 | 5 | NM_001267550.2 | P1 | |
TTN-AS1 | ENST00000659121.1 | n.502+78C>T | intron_variant, non_coding_transcript_variant |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD3 exomes AF: 0.00000403 AC: 1AN: 247950Hom.: 0 AF XY: 0.00000744 AC XY: 1AN XY: 134470
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GnomAD4 exome AF: 0.0000253 AC: 37AN: 1461030Hom.: 0 Cov.: 31 AF XY: 0.0000248 AC XY: 18AN XY: 726788
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GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
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32
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Autosomal recessive limb-girdle muscular dystrophy type 2J;C1858763:Dilated cardiomyopathy 1G Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 03, 2017 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Eigen
Uncertain
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D;D;.;D;D;D
M_CAP
Benign
D
MetaRNN
Uncertain
D;D;D;D;D;D;D
MetaSVM
Benign
T
MutationTaster
Benign
D;D;D;D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
D;D;.;.;D;D;.
REVEL
Uncertain
Sift
Benign
T;D;.;.;T;T;.
Polyphen
1.0
.;.;.;D;.;.;D
Vest4
MutPred
0.60
.;.;.;Loss of catalytic residue at V17468 (P = 0.0487);.;.;Loss of catalytic residue at V17468 (P = 0.0487);
MVP
MPC
0.51
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
Name
Calibrated prediction
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at