rs199476302
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP2
The NM_001018005.2(TPM1):c.67G>C(p.Glu23Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E23D) has been classified as Uncertain significance.
Frequency
Genomes: not found (cov: 33)
Consequence
TPM1
NM_001018005.2 missense
NM_001018005.2 missense
Scores
6
10
3
Clinical Significance
Conservation
PhyloP100: 7.92
Genes affected
TPM1 (HGNC:12010): (tropomyosin 1) This gene is a member of the tropomyosin family of highly conserved, widely distributed actin-binding proteins involved in the contractile system of striated and smooth muscles and the cytoskeleton of non-muscle cells. Tropomyosin is composed of two alpha-helical chains arranged as a coiled-coil. It is polymerized end to end along the two grooves of actin filaments and provides stability to the filaments. The encoded protein is one type of alpha helical chain that forms the predominant tropomyosin of striated muscle, where it also functions in association with the troponin complex to regulate the calcium-dependent interaction of actin and myosin during muscle contraction. In smooth muscle and non-muscle cells, alternatively spliced transcript variants encoding a range of isoforms have been described. Mutations in this gene are associated with type 3 familial hypertrophic cardiomyopathy and dilated cardiomyopathy 1Y. [provided by RefSeq, Jun 2022]
Genome browser will be placed here
ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 5 ACMG points.
PM1
?
In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 15 uncertain in NM_001018005.2
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, TPM1
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TPM1 | NM_001018005.2 | c.67G>C | p.Glu23Gln | missense_variant | 1/10 | ENST00000403994.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TPM1 | ENST00000403994.9 | c.67G>C | p.Glu23Gln | missense_variant | 1/10 | 1 | NM_001018005.2 | A1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1Other:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hypertrophic cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Dec 06, 2022 | 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 31893). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 20215591). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 23 of the TPM1 protein (p.Glu23Gln). - |
not provided Other:1
not provided, no classification provided | curation | Leiden Muscular Dystrophy (TPM1) | Apr 15, 2012 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Uncertain
CardioboostCm
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D;D;D;.;D;D;D;D;D;D;D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D;D;D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
D
MutationAssessor
Pathogenic
H;H;.;.;H;.;H;H;H;H;.
MutationTaster
Benign
D;D;D;D;D;D;N;N
PrimateAI
Uncertain
T
PROVEAN
Benign
N;N;.;N;N;N;N;N;N;.;N
REVEL
Uncertain
Sift
Uncertain
D;D;.;D;D;D;D;D;D;.;T
Sift4G
Benign
T;T;T;T;T;D;T;T;T;.;.
Polyphen
0.92, 1.0, 0.99
.;.;.;.;P;D;.;.;.;D;.
Vest4
MutPred
Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);Gain of MoRF binding (P = 0.0513);
MVP
MPC
2.4
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
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