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NM_000530.8(MPZ):c.448G>T (p.Val150Leu) AND Charcot-Marie-Tooth disease, type I

Germline classification:
Uncertain significance (1 submission)
Last evaluated:
Dec 6, 2023
Review status:
1 star out of maximum of 4 stars
criteria provided, single submitter
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV003087278.4

Allele description [Variation Report for NM_000530.8(MPZ):c.448G>T (p.Val150Leu)]

NM_000530.8(MPZ):c.448G>T (p.Val150Leu)

Gene:
MPZ:myelin protein zero [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
1q23.3
Genomic location:
Preferred name:
NM_000530.8(MPZ):c.448G>T (p.Val150Leu)
HGVS:
  • NC_000001.11:g.161306708C>A
  • NG_008055.1:g.8265G>T
  • NM_000530.8:c.448G>TMANE SELECT
  • NM_001315491.2:c.448G>T
  • NP_000521.2:p.Val150Leu
  • NP_000521.2:p.Val150Leu
  • NP_001302420.1:p.Val150Leu
  • LRG_256t1:c.448G>T
  • LRG_256:g.8265G>T
  • LRG_256p1:p.Val150Leu
  • NC_000001.10:g.161276498C>A
  • NM_000530.6:c.448G>T
Protein change:
V150L
Molecular consequence:
  • NM_000530.8:c.448G>T - missense variant - [Sequence Ontology: SO:0001583]
  • NM_001315491.2:c.448G>T - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:
Charcot-Marie-Tooth disease, type I (CMT1)
Synonyms:
Charcot-Marie-Tooth Neuropathy Type 1; Hereditary Motor and Sensory Neuropathy 1; Charcot-Marie-Tooth, Type 1
Identifiers:
MONDO: MONDO:0019011; MedGen: C0751036

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Assertion and evidence details

Help
Submission AccessionSubmitterReview Status
(Assertion method)		Clinical Significance
(Last evaluated)		OriginMethodCitations
SCV003487646Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))		Uncertain significance
(Dec 6, 2023) 		germlineclinical testing

PubMed (4)
[See all records that cite these PMIDs]

Help

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

Genotype-phenotype correlation in French patients with myelin protein zero gene-related inherited neuropathy.

Subréville M, Bonello-Palot N, Yahiaoui D, Beloribi-Djefaflia S, Fernandes S, Stojkovic T, Cassereau J, Péréon Y, Echaniz-Laguna A, Violleau MH, Soulages A, Louis SL, Masingue M, Magot A, Delmont E, Sacconi S, Adams D, Labeyrie C, Genestet S, Noury JB, Chanson JB, Lévy N, et al.

Eur J Neurol. 2021 Sep;28(9):2913-2921. doi: 10.1111/ene.14948. Epub 2021 Jun 29.

PubMed [citation]
PMID:
34060176

Aberrant 5' splice sites in human disease genes: mutation pattern, nucleotide structure and comparison of computational tools that predict their utilization.

Buratti E, Chivers M, Královicová J, Romano M, Baralle M, Krainer AR, Vorechovsky I.

Nucleic Acids Res. 2007;35(13):4250-63. Epub 2007 Jun 18.

PubMed [citation]
PMID:
17576681
PMCID:
PMC1934990
See all PubMed Citations (4)

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV003487646.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (4)

Description

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 150 of the MPZ protein (p.Val150Leu). This variant also falls at the last nucleotide of exon 3, which is part of the consensus splice site for this exon. This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of Charcot-Marie-Tooth disease (PMID: 34060176). ClinVar contains an entry for this variant (Variation ID: 2172147). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 29, 2024