NM_001303256.3(MORC2):c.2747+6T>C AND Charcot-Marie-Tooth disease axonal type 2Z

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Dec 17, 2019
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:: RCV000796934.8

Allele description [Variation Report for NM_001303256.3(MORC2):c.2747+6T>C]

NM_001303256.3(MORC2):c.2747+6T>C

Gene:

MORC2:MORC family CW-type zinc finger 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

22q12.2

Genomic location:

Preferred name:

NM_001303256.3(MORC2):c.2747+6T>C

HGVS:

NC_000022.11:g.30932539A>G
NG_046752.1:g.40959T>C
NM_001303256.3:c.2747+6T>CMANE SELECT
NM_001303257.2:c.2747+6T>C
NM_014941.3:c.2561+6T>C
NC_000022.10:g.31328526A>G
NM_001303256.2:c.2747+6T>C

Links:

dbSNP: rs368417146

NCBI 1000 Genomes Browser:

rs368417146

Molecular consequence:

NM_001303256.3:c.2747+6T>C - intron variant - [Sequence Ontology: SO:0001627]
NM_001303257.2:c.2747+6T>C - intron variant - [Sequence Ontology: SO:0001627]
NM_014941.3:c.2561+6T>C - intron variant - [Sequence Ontology: SO:0001627]

Condition(s)

Name:: Charcot-Marie-Tooth disease axonal type 2Z
Synonyms:: CHARCOT-MARIE-TOOTH DISEASE, AXONAL, AUTOSOMAL DOMINANT, TYPE 2Z; CHARCOT-MARIE-TOOTH NEUROPATHY, TYPE 2Z
Identifiers:: MONDO: MONDO:0014736; MedGen: C5569025; OMIM: 616688

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000936469	Invitae	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Dec 17, 2019)	germline	clinical testing	PubMed (3) [See all records that cite these PMIDs] 17576681, 9536098, 28492532

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000936469

Invitae

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Dec 17, 2019)

germline

clinical testing

PubMed (3)
[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

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

Statistical features of human exons and their flanking regions.

Zhang MQ.

Hum Mol Genet. 1998 May;7(5):919-32.

PubMed [citation]

PMID:: 9536098

See all PubMed Citations (3)

Details of each submission

From Invitae, SCV000936469.6

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (3)

Description

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. Nucleotide substitutions within 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 is not likely to affect RNA splicing, but this prediction has not been confirmed by published transcriptional studies. This variant has not been reported in the literature in individuals with MORC2-related conditions. This variant is present in population databases (rs368417146, ExAC 0.009%). This sequence change falls in intron 23 of the MORC2 gene. It does not directly change the encoded amino acid sequence of the MORC2 protein, but it affects a nucleotide within the consensus splice site of the intron.

#	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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