NM_000530.8(MPZ):c.274G>A (p.Val92Met) AND Charcot-Marie-Tooth disease, type I

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Feb 27, 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:: RCV001323340.6

Allele description [Variation Report for NM_000530.8(MPZ):c.274G>A (p.Val92Met)]

NM_000530.8(MPZ):c.274G>A (p.Val92Met)

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.274G>A (p.Val92Met)

HGVS:

NC_000001.11:g.161306882C>T
NG_008055.1:g.8091G>A
NM_000530.8:c.274G>AMANE SELECT
NM_001315491.2:c.274G>A
NP_000521.2:p.Val92Met
NP_001302420.1:p.Val92Met
LRG_256t1:c.274G>A
LRG_256:g.8091G>A
LRG_256p1:p.Val92Met
NC_000001.10:g.161276672C>T
NM_000530.6:c.274G>A
P25189:p.Val92Met

Protein change:

V92M; VAL92MET

Links:

UniProtKB: P25189#VAR_015975; OMIM: 159440.0017; dbSNP: rs267607245

NCBI 1000 Genomes Browser:

rs267607245

Molecular consequence:

NM_000530.8:c.274G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001315491.2:c.274G>A - 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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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV001514252	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Feb 27, 2023)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 11835375, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV001514252

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Feb 27, 2023)

germline

clinical testing

PubMed (2)
[See all records that cite these PMIDs]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Charcot-Marie-Tooth disease and related neuropathies: mutation distribution and genotype-phenotype correlation.

Boerkoel CF, Takashima H, Garcia CA, Olney RK, Johnson J, Berry K, Russo P, Kennedy S, Teebi AS, Scavina M, Williams LL, Mancias P, Butler IJ, Krajewski K, Shy M, Lupski JR.

Ann Neurol. 2002 Feb;51(2):190-201.

PubMed [citation]

PMID:: 11835375

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Invitae, SCV001514252.4

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (2)

Description

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 92 of the MPZ protein (p.Val92Met). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with Charcot-Marie-Tooth disease (PMID: 11835375). ClinVar contains an entry for this variant (Variation ID: 242745). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MPZ protein function. 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.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Feb 20, 2024

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