rs377157235
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM5PP5_Moderate
The NM_001276345.2(TNNT2):c.565T>G(p.Ser189Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000479 in 1,461,890 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S189F) has been classified as Likely pathogenic.
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.0000048 ( 0 hom. )
Consequence
TNNT2
NM_001276345.2 missense
NM_001276345.2 missense
Scores
1
10
6
Clinical Significance
Conservation
PhyloP100: 5.16
Genes affected
TNNT2 (HGNC:11949): (troponin T2, cardiac type) This gene encodes the cardiac isoform of troponin T. The encoded protein is the tropomyosin-binding subunit of the troponin complex, which is located on the thin filament of striated muscles and regulates muscle contraction in response to alterations in intracellular calcium ion concentration. Mutations in this gene have been associated with familial hypertrophic cardiomyopathy as well as with dilated cardiomyopathy. [provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM1
?
In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 13 uncertain in NM_001276345.2
PM5
?
Other missense variant is known to change same aminoacid residue: Variant chr1-201363330-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 177634.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
PP5
?
Variant 1-201363331-A-C is Pathogenic according to our data. Variant chr1-201363331-A-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 469526.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TNNT2 | NM_001276345.2 | c.565T>G | p.Ser189Ala | missense_variant | 12/17 | ENST00000656932.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TNNT2 | ENST00000656932.1 | c.565T>G | p.Ser189Ala | missense_variant | 12/17 | NM_001276345.2 | A2 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome AF: 0.00000479 AC: 7AN: 1461890Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2AN XY: 727248
GnomAD4 exome
AF:
AC:
7
AN:
1461890
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Cov.:
31
AF XY:
AC XY:
2
AN XY:
727248
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GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
Bravo
AF:
ESP6500AA
AF:
AC:
0
ESP6500EA
AF:
AC:
1
ClinVar
Significance: Likely pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Dilated cardiomyopathy 1D;C1861864:Hypertrophic cardiomyopathy 2;C2676271:Cardiomyopathy, familial restrictive, 3 Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Invitae | Sep 06, 2023 | In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant disrupts the p.Ser179 amino acid residue in TNNT2. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 11034944, 27532257). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TNNT2 protein function. ClinVar contains an entry for this variant (Variation ID: 469526). This variant has not been reported in the literature in individuals affected with TNNT2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces serine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 179 of the TNNT2 protein (p.Ser179Ala). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
CardioboostCm
Benign
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Benign
Cadd
Pathogenic
Dann
Uncertain
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D;D;D;D;D;D;D;D;D;D;D
MetaSVM
Uncertain
D
MutationTaster
Benign
D;D;D;D;D;D;D;D;D;D
PrimateAI
Uncertain
T
PROVEAN
Benign
N;N;.;.;.;.;.;.;N;N;N
REVEL
Uncertain
Sift
Benign
T;T;.;.;.;.;.;.;T;T;T
Sift4G
Benign
T;T;T;T;T;T;T;T;T;T;.
Polyphen
0.97, 0.97
.;.;.;.;D;.;.;.;.;.;D
Vest4
MVP
MPC
1.3
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at