rs1553260014
Positions:
Variant summary
Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1PM2PP3_StrongPP5_Moderate
The NM_000530.8(MPZ):c.67+1G>A variant causes a splice donor change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★).
Frequency
Genomes: not found (cov: 28)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
MPZ
NM_000530.8 splice_donor
NM_000530.8 splice_donor
Scores
4
2
1
Splicing: ADA: 1.000
2
Clinical Significance
Conservation
PhyloP100: 3.58
Genes affected
MPZ (HGNC:7225): (myelin protein zero) This gene is specifically expressed in Schwann cells of the peripheral nervous system and encodes a type I transmembrane glycoprotein that is a major structural protein of the peripheral myelin sheath. The encoded protein contains a large hydrophobic extracellular domain and a smaller basic intracellular domain, which are essential for the formation and stabilization of the multilamellar structure of the compact myelin. Mutations in this gene are associated with autosomal dominant form of Charcot-Marie-Tooth disease type 1 (CMT1B) and other polyneuropathies, such as Dejerine-Sottas syndrome (DSS) and congenital hypomyelinating neuropathy (CHN). A recent study showed that two isoforms are produced from the same mRNA by use of alternative in-frame translation termination codons via a stop codon readthrough mechanism. [provided by RefSeq, Oct 2015]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 16 ACMG points.
PVS1
?
Splicing variant, LoF is a know mechanism of disease,
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
PP5
?
Variant 1-161309838-C-T is Pathogenic according to our data. Variant chr1-161309838-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 447733.Status of the report is criteria_provided_single_submitter, 1 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MPZ | NM_000530.8 | c.67+1G>A | splice_donor_variant | ENST00000533357.5 | |||
MPZ | NM_001315491.2 | c.67+1G>A | splice_donor_variant | ||||
MPZ | XM_017001321.3 | c.97+1G>A | splice_donor_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MPZ | ENST00000533357.5 | c.67+1G>A | splice_donor_variant | 1 | NM_000530.8 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 28
GnomAD3 genomes
?
Cov.:
28
GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 1426864Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0AN XY: 705888
GnomAD4 exome
Data not reliable, filtered out with message: AC0
AF:
AC:
0
AN:
1426864
Hom.:
Cov.:
30
AF XY:
AC XY:
0
AN XY:
705888
Gnomad4 AFR exome
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GnomAD4 genome ? Cov.: 28
GnomAD4 genome
?
Cov.:
28
ClinVar
Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not provided Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Athena Diagnostics | Dec 28, 2016 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Uncertain
D
MutationTaster
Benign
D;D;D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DL_spliceai
Position offset: 1
Find out detailed SpliceAI scores and Pangolin per-transcript scores at