NM_001943.5:c.6G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001943.5(DSG2):c.6G>A(p.Ala2Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00195 in 1,260,138 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A2A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0019 ( 1 hom., cov: 32)

Exomes 𝑓: 0.0020 ( 11 hom. )

Consequence

DSG2
NM_001943.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:18

Conservation

PhyloP100: 0.906

Publications

3 publications found

Variant links:

Genes affected

DSG2 (HGNC:3049): (desmoglein 2) This gene encodes a member of the desmoglein family and cadherin cell adhesion molecule superfamily of proteins. Desmogleins are calcium-binding transmembrane glycoprotein components of desmosomes, cell-cell junctions between epithelial, myocardial, and other cell types. The encoded preproprotein is proteolytically processed to generate the mature glycoprotein. This gene is present in a gene cluster with other desmoglein gene family members on chromosome 18. Mutations in this gene have been associated with arrhythmogenic right ventricular dysplasia, familial, 10. [provided by RefSeq, Jan 2016]

DSG2 Gene-Disease associations (from GenCC):

arrhythmogenic right ventricular cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
arrhythmogenic right ventricular dysplasia 10
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
dilated cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
dilated cardiomyopathy 1BB
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

DSG2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.38).

BP6

Variant 18-31498257-G-A is Benign according to our data. Variant chr18-31498257-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 137166.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.906 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00191 (291/152112) while in subpopulation SAS AF = 0.00228 (11/4830). AF 95% confidence interval is 0.00169. There are 1 homozygotes in GnomAd4. There are 162 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 11 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DSG2	NM_001943.5 link	c.6G>A	p.Ala2Ala	synonymous_variant	Exon 1 of 15	ENST00000261590.13	NP_001934.2	Q14126
DSG2	XM_047437315.1 link	c.-567G>A		5_prime_UTR_variant	Exon 1 of 16		XP_047293271.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DSG2	ENST00000261590.13 link	c.6G>A	p.Ala2Ala	synonymous_variant	Exon 1 of 15	1	NM_001943.5	ENSP00000261590.8		Q14126

Frequencies

GnomAD3 genomes

AF:

0.00191

AC:

291

AN:

151994

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000266

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000917

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000388

Gnomad SAS

AF:

0.00228

Gnomad FIN

AF:

0.0107

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00196

Gnomad OTH

AF:

0.00335

GnomAD2 exomes

AF:

0.00950

AC:

137

AN:

14428

AF XY:

0.0101

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0139

Gnomad NFE exome

AF:

0.00311

Gnomad OTH exome

AF:

0.00581

GnomAD4 exome

AF:

0.00195

AC:

2166

AN:

1108026

Hom.:

Cov.:

AF XY:

0.00195

AC XY:

1026

AN XY:

526860

show subpopulations

African (AFR)

AF:

0.000216

AC:

AN:

23176

American (AMR)

AF:

0.000560

AC:

AN:

8924

Ashkenazi Jewish (ASJ)

AF:

0.000138

AC:

AN:

14488

East Asian (EAS)

AF:

0.00

AC:

AN:

26934

South Asian (SAS)

AF:

0.00408

AC:

AN:

20814

European-Finnish (FIN)

AF:

0.0114

AC:

397

AN:

34746

Middle Eastern (MID)

AF:

0.000498

AC:

AN:

4018

European-Non Finnish (NFE)

AF:

0.00173

AC:

1613

AN:

930630

Other (OTH)

AF:

0.00129

AC:

AN:

44296

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

111

223

334

446

557

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

136

204

272

340

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00191

AC:

291

AN:

152112

Hom.:

Cov.:

AF XY:

0.00218

AC XY:

162

AN XY:

74376

show subpopulations

African (AFR)

AF:

0.000265

AC:

AN:

41528

American (AMR)

AF:

0.000916

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000389

AC:

AN:

5136

South Asian (SAS)

AF:

0.00228

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.0107

AC:

113

AN:

10568

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00196

AC:

133

AN:

67970

Other (OTH)

AF:

0.00331

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00254

Hom.:

Bravo

AF:

0.00105

Asia WGS

AF:

0.000289

AC:

AN:

3476

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:18

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:6

Oct 03, 2013

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

May 08, 2018

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: DSG2 c.6G>A alters a non-conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0051 in 45050 control chromosomes in the gnomAD database, including 3 homozygotes. The observed variant frequency is approximately 500 fold of the estimated maximal expected allele frequency for a pathogenic variant in DSG2 causing Arrhythmia phenotype (1e-05), strongly suggesting that the variant is benign. c.6G>A has been reported in the literature in an individual affected with Arrhythmia (Lahtinen 2011). This report however does not provide unequivocal conclusions about association of the variant with Arrhythmia. Co-occurrence with another pathogenic variant have been found in our internal database (KCNH2 c.1841C>T, p.Ala614Val), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 (three of them calling it 'likely benign' and one classifying it as a 'VUS') without evidence for independent evaluation. Based on the evidence outlined above, the variant was classified as benign. -

Apr 20, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Ala2Ala in exon 1 of DSG2: This variant is not expected to have clinical signifi cance because it does not alter an amino acid residue and is not located within the splice consensus sequence. It has been identified in 0.2% (14/7372) of Europ ean American chromosomes from a broad population by the NHLBI Exome Sequencing P roject (http://evs.gs.washington.edu/EVS). Ala2Ala in exon 1 of DSG2 (allele fr equency = 0.2%, 14/7372) ** -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

not provided

Benign:5

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Nov 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

DSG2: BP4, BP7 -

Jun 12, 2018

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Cardiomyopathy

Benign:2

Nov 16, 2022

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 12, 2018

Color Diagnostics, LLC DBA Color Health

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Arrhythmogenic right ventricular dysplasia 10

Benign:2

Mar 19, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Arrhythmogenic right ventricular cardiomyopathy

Benign:1

Feb 05, 2024

All of Us Research Program, National Institutes of Health

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Benign:1

Jul 09, 2015

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

DSG2-related disorder

Benign:1

Apr 08, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.38

CADD

Benign

(source)

DANN

Benign

0.97

PhyloP100

0.91

PromoterAI

-0.25

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over