X-150592619-C-T
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_000252.3(MTM1):c.5C>T(p.Ala2Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A2A) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 23)
Consequence
MTM1
NM_000252.3 missense
NM_000252.3 missense
Scores
3
9
5
Clinical Significance
Conservation
PhyloP100: 5.15
Genes affected
MTM1 (HGNC:7448): (myotubularin 1) This gene encodes a dual-specificity phosphatase that acts on both phosphotyrosine and phosphoserine. It is required for muscle cell differentiation and mutations in this gene have been identified as being responsible for X-linked myotubular myopathy. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MTM1 | NM_000252.3 | c.5C>T | p.Ala2Val | missense_variant | 2/15 | ENST00000370396.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MTM1 | ENST00000370396.7 | c.5C>T | p.Ala2Val | missense_variant | 2/15 | 1 | NM_000252.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 23
GnomAD3 genomes
?
Cov.:
23
GnomAD4 exome Cov.: 26
GnomAD4 exome
Cov.:
26
GnomAD4 genome ? Cov.: 23
GnomAD4 genome
?
Cov.:
23
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Severe X-linked myotubular myopathy Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Dec 14, 2018 | This sequence change replaces alanine with valine at codon 2 of the MTM1 protein (p.Ala2Val). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and valine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with MTM1-related conditions. 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: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
Cadd
Benign
Dann
Uncertain
DEOGEN2
Benign
T;.
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T;T
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D;D
MetaSVM
Uncertain
D
MutationAssessor
Uncertain
M;.
MutationTaster
Benign
D;D;D;D
PrimateAI
Uncertain
T
PROVEAN
Benign
N;N
REVEL
Uncertain
Sift
Benign
T;D
Sift4G
Uncertain
T;T
Polyphen
B;.
Vest4
MutPred
Loss of glycosylation at S7 (P = 0.0886);Loss of glycosylation at S7 (P = 0.0886);
MVP
MPC
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