rs1555065024
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_016156.6(MTMR2):āc.408A>Cā(p.Glu136Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,648 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (ā ā ).
Frequency
Genomes: not found (cov: 32)
Exomes š: 0.0000041 ( 0 hom. )
Consequence
MTMR2
NM_016156.6 missense
NM_016156.6 missense
Scores
3
12
4
Clinical Significance
Conservation
PhyloP100: 0.969
Genes affected
MTMR2 (HGNC:7450): (myotubularin related protein 2) This gene is a member of the myotubularin family of phosphoinositide lipid phosphatases. The encoded protein possesses phosphatase activity towards phosphatidylinositol-3-phosphate and phosphatidylinositol-3,5-bisphosphate. Mutations in this gene are a cause of Charcot-Marie-Tooth disease type 4B, an autosomal recessive demyelinating neuropathy. Alternatively spliced transcript variants encoding multiple isoforms have been found for this gene. [provided by RefSeq, Aug 2011]
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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 |
---|---|---|---|---|---|---|---|
MTMR2 | NM_016156.6 | c.408A>C | p.Glu136Asp | missense_variant | 5/15 | ENST00000346299.10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MTMR2 | ENST00000346299.10 | c.408A>C | p.Glu136Asp | missense_variant | 5/15 | 1 | NM_016156.6 | P3 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 0.00000410 AC: 6AN: 1461648Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727124
GnomAD4 exome
AF:
AC:
6
AN:
1461648
Hom.:
Cov.:
31
AF XY:
AC XY:
1
AN XY:
727124
Gnomad4 AFR exome
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Gnomad4 OTH exome
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GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
Bravo
AF:
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jun 16, 2020 | The p.E136D variant (also known as c.408A>C), located in coding exon 5 of the MTMR2 gene, results from an A to C substitution at nucleotide position 408. The glutamic acid at codon 136 is replaced by aspartic acid, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Charcot-Marie-Tooth disease type 4 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 27, 2021 | This sequence change replaces glutamic acid with aspartic acid at codon 136 of the MTMR2 protein (p.Glu136Asp). The glutamic acid residue is highly conserved and there is a small physicochemical difference between glutamic acid and aspartic acid. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with MTMR2-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 C15"). 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
Uncertain
DANN
Uncertain
DEOGEN2
Pathogenic
D;.;.;.;D
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D;D;.;.;D
M_CAP
Uncertain
D
MetaRNN
Uncertain
D;D;D;D;D
MetaSVM
Uncertain
D
MutationAssessor
Uncertain
M;.;.;.;.
MutationTaster
Benign
D;D;D;D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D;D;D;D;D
REVEL
Uncertain
Sift
Uncertain
D;D;D;D;D
Sift4G
Benign
T;T;T;T;.
Polyphen
B;.;.;.;.
Vest4
MutPred
Loss of methylation at K137 (P = 0.0926);.;.;.;.;
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