NM_014874.4(MFN2):c.1189C>T (p.Arg397Trp) AND Charcot-Marie-Tooth disease type 2

This record was updated by the submitter. Please see the current version.

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Feb 24, 2018
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:: RCV000691296.6

Allele description

NM_014874.4(MFN2):c.1189C>T (p.Arg397Trp)

Gene:

MFN2:mitofusin 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

1p36.22

Genomic location:

Preferred name:

NM_014874.4(MFN2):c.1189C>T (p.Arg397Trp)

HGVS:

NC_000001.11:g.12004020C>T
NG_007945.1:g.28840C>T
NM_001127660.2:c.1189C>T
NM_014874.4:c.1189C>TMANE SELECT
NP_001121132.1:p.Arg397Trp
NP_055689.1:p.Arg397Trp
NP_055689.1:p.Arg397Trp
LRG_255t1:c.1189C>T
LRG_255:g.28840C>T
LRG_255p1:p.Arg397Trp
NC_000001.10:g.12064077C>T
NM_014874.3:c.1189C>T

Protein change:

R397W

Links:

dbSNP: rs758948968

NCBI 1000 Genomes Browser:

rs758948968

Molecular consequence:

NM_001127660.2:c.1189C>T - missense variant - [Sequence Ontology: SO:0001583]
NM_014874.4:c.1189C>T - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Charcot-Marie-Tooth disease type 2
Synonyms:: Charcot-Marie-Tooth, Type 2
Identifiers:: MONDO: MONDO:0018993; MedGen: C0270914

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000819048	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Feb 24, 2018)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000819048

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Feb 24, 2018)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

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

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, SCV000819048.4

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

Description

This sequence change replaces arginine with tryptophan at codon 397 of the MFN2 protein (p.Arg397Trp). The arginine residue is highly conserved and there is a moderate physicochemical difference between arginine and tryptophan. This variant is present in population databases (rs758948968, ExAC 0.009%). This variant has not been reported in the literature in individuals with MFN2-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; 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.

#	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: Jun 23, 2024

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