rs199474714
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP2PP3
The NM_152263.4(TPM3):c.466G>A(p.Ala156Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Consequence
TPM3
NM_152263.4 missense
NM_152263.4 missense
Scores
10
4
1
Clinical Significance
Conservation
PhyloP100: 7.85
Genes affected
TPM3 (HGNC:12012): (tropomyosin 3) This gene encodes a member of the tropomyosin family of actin-binding proteins. Tropomyosins are dimers of coiled-coil proteins that provide stability to actin filaments and regulate access of other actin-binding proteins. Mutations in this gene result in autosomal dominant nemaline myopathy and other muscle disorders. This locus is involved in translocations with other loci, including anaplastic lymphoma receptor tyrosine kinase (ALK) and neurotrophic tyrosine kinase receptor type 1 (NTRK1), which result in the formation of fusion proteins that act as oncogenes. There are numerous pseudogenes for this gene on different chromosomes. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2013]
Genome browser will be placed here
ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM1
?
In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_152263.4
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, TPM3
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.84
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TPM3 | NM_152263.4 | c.466G>A | p.Ala156Thr | missense_variant | 4/10 | ENST00000651641.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TPM3 | ENST00000651641.1 | c.466G>A | p.Ala156Thr | missense_variant | 4/10 | NM_152263.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 32
GnomAD4 exome
Cov.:
32
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1Other:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Congenital myopathy with fiber type disproportion;C5829889:Congenital myopathy 4B, autosomal recessive Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jan 03, 2019 | This sequence change replaces alanine with threonine at codon 156 of the TPM3 protein (p.Ala156Thr). The alanine residue is highly conserved and there is a small physicochemical difference between alanine and threonine. This variant is not present in population databases (ExAC no frequency). This variant has been observed in a family affected with nemaline myopathy (PMID: 20012312). ClinVar contains an entry for this variant (Variation ID: 140498). This variant has been reported to affect TPM3 protein function (PMID:22749829). 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. - |
not provided Other:1
not provided, no classification provided | literature only | TPM3 homepage - Leiden Muscular Dystrophy pages | - | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Pathogenic
DEOGEN2
Uncertain
T;.;.;D;.;.;.;.;.;.;D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D;D;D;.;D;D;D;D;D;D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D;D;D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
D
MutationTaster
Benign
D;D;D;D;D;D;D;D;D;D
PrimateAI
Pathogenic
D
Sift4G
Uncertain
D;D;D;D;D;D;D;D;D;D;D
Polyphen
0.98, 0.91
.;D;.;.;.;.;.;.;P;.;.
Vest4
MVP
MPC
2.1
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Varity_R
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