NM_001943.5(DSG2):c.918G>A (p.Trp306Ter) AND Arrhythmogenic right ventricular cardiomyopathy

Germline classification:: Uncertain significance (1 submission)
Last evaluated:: Dec 18, 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:: RCV003996106.2

Allele description [Variation Report for NM_001943.5(DSG2):c.918G>A (p.Trp306Ter)]

NM_001943.5(DSG2):c.918G>A (p.Trp306Ter)

Gene:

DSG2:desmoglein 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

18q12.1

Genomic location:

Preferred name:

NM_001943.5(DSG2):c.918G>A (p.Trp306Ter)

Other names:

W305*; p.W306*:TGG>TGA

HGVS:

NC_000018.10:g.31524792G>A
NG_007072.3:g.31551G>A
NM_001943.5:c.918G>AMANE SELECT
NP_001934.2:p.Trp306Ter
NP_001934.2:p.Trp306Ter
LRG_397t1:c.918G>A
LRG_397:g.31551G>A
LRG_397p1:p.Trp306Ter
NC_000018.9:g.29104755G>A
NG_007072.2:g.31551G>A
NM_001943.3:c.918G>A

Note:

NCBI staff reviewed the sequence information reported in PubMed 16773573 to determine the location of this allele on current reference sequence.

Protein change:

W306*; TRP305TER

Links:

OMIM: 125671.0002; dbSNP: rs121913007

NCBI 1000 Genomes Browser:

rs121913007

Molecular consequence:

NM_001943.5:c.918G>A - nonsense - [Sequence Ontology: SO:0001587]

Observations:

Condition(s)

Name:: Arrhythmogenic right ventricular cardiomyopathy (ARVD)
Synonyms:: Cardiomyopathy, ARVC; Arrhythmogenic right ventricular dysplasia
Identifiers:: MONDO: MONDO:0016587; MeSH: D019571; MedGen: C0349788

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV004842775	All of Us Research Program, National Institutes of Health	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain Significance (Dec 18, 2023)	germline	clinical testing	PubMed (2) [See all records that cite these PMIDs] 16773573, 25741868

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV004842775

All of Us Research Program, National Institutes of Health

criteria provided, single submitter

(ACMG Guidelines, 2015)

Uncertain Significance
(Dec 18, 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	1	not provided	not provided	108544	not provided	clinical testing

Citations

PubMed

DSG2 mutations contribute to arrhythmogenic right ventricular dysplasia/cardiomyopathy.

Awad MM, Dalal D, Cho E, Amat-Alarcon N, James C, Tichnell C, Tucker A, Russell SD, Bluemke DA, Dietz HC, Calkins H, Judge DP.

Am J Hum Genet. 2006 Jul;79(1):136-42. Epub 2006 Apr 28.

PubMed [citation]

PMID:: 16773573
PMCID:: PMC1474134

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee.

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]

PMID:: 25741868
PMCID:: PMC4544753

Details of each submission

From All of Us Research Program, National Institutes of Health, SCV004842775.1

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

Description

This variant changes 1 nucleotide in exon 8 of the DSG2 gene, creating a premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant (referred to as c.915G>A, W305X) has been reported in an individual affected with arrhythmogenic right ventricular cardiomyopathy, who also carried another pathogenic variant in the DSG2 gene that could explain the observed phenotype (PMID: 16773573). This variant has been observed in the proband's unaffected mother and sister as well. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Although there is a suspicion for a pathogenic role, clinical relevance of loss-of-function DSC2 truncation and splice variants in autosomal dominant arrhythmogenic cardiomyopathy is not yet clearly established. The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is 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	108544	not provided	not provided		1	not provided	not provided	not provided

Last Updated: Jun 14, 2025

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