chr18-31546595-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001943.5(DSG2):c.3209C>T(p.Thr1070Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00095 in 1,614,176 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict 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. T1070T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0023 ( 6 hom., cov: 32)

Exomes 𝑓: 0.00081 ( 7 hom. )

Consequence

DSG2
NM_001943.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:19

Conservation

PhyloP100: -0.525

Publications

10 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 links:

DSG2-AS1 (HGNC:51311): (DSG2 antisense RNA 1)

DSG2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0035711825).

BP6

Variant 18-31546595-C-T is Benign according to our data. Variant chr18-31546595-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 178022.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00232 (353/152296) while in subpopulation AMR AF = 0.0173 (264/15302). AF 95% confidence interval is 0.0155. There are 6 homozygotes in GnomAd4. There are 221 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 6 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
DSG2	NM_001943.5 link	c.3209C>T	p.Thr1070Met	missense_variant	Exon 15 of 15	ENST00000261590.13	NP_001934.2
DSG2	XM_047437315.1 link	c.2675C>T	p.Thr892Met	missense_variant	Exon 16 of 16		XP_047293271.1
DSG2-AS1	NR_045216.1 link	n.1346-689G>A		intron_variant	Intron 3 of 5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DSG2	ENST00000261590.13 link	c.3209C>T	p.Thr1070Met	missense_variant	Exon 15 of 15	1	NM_001943.5	ENSP00000261590.8

Frequencies

GnomAD3 genomes

AF:

0.00232

AC:

353

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000652

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0173

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00674

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000338

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.00181

AC:

452

AN:

249392

AF XY:

0.00172

show subpopulations

Gnomad AFR exome

AF:

0.000517

Gnomad AMR exome

AF:

0.00863

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00478

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000362

Gnomad OTH exome

AF:

0.00148

GnomAD4 exome

AF:

0.000807

AC:

1180

AN:

1461880

Hom.:

Cov.:

AF XY:

0.000787

AC XY:

572

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.000209

AC:

AN:

33480

American (AMR)

AF:

0.00874

AC:

391

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00889

AC:

353

AN:

39700

South Asian (SAS)

AF:

0.000336

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000308

AC:

343

AN:

1112008

Other (OTH)

AF:

0.000911

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

181

272

362

453

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<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:

0.00232

AC:

353

AN:

152296

Hom.:

Cov.:

AF XY:

0.00297

AC XY:

221

AN XY:

74464

show subpopulations

African (AFR)

AF:

0.000650

AC:

AN:

41554

American (AMR)

AF:

0.0173

AC:

264

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00675

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.0000942

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000338

AC:

AN:

68026

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000742

Hom.:

Bravo

AF:

0.00244

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000265

AC:

ESP6500EA

AF:

0.000604

AC:

ExAC

AF:

0.00118

AC:

142

Asia WGS

AF:

0.00260

AC:

AN:

3478

EpiCase

AF:

0.000382

EpiControl

AF:

0.000296

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:19

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:10

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

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Mar 03, 2015

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 30821013, 26230511) -

Clinical Genetics, Academic Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Mar 08, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jun 24, 2013

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:research

- -

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

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

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

- -

not specified

Benign:3

Nov 30, 2016

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 21, 2019

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.3209C>T (p.Thr1070Met) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0017 in 277006 control chromosomes, predominantly at a frequency of 0.0087 within the Latino subpopulation in the gnomAD database, including 5 homozygotes. The observed variant frequency within Latino control individuals in the gnomAD database is approximately 348 fold of the estimated maximal expected allele frequency for a pathogenic variant in DSG2 causing Cardiomyopathy phenotype (2.5e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Latino origin. c.3209C>T has been reported in the literature among 870 participants not selected for arrhythmia, cardiomyopathy (Ng_2013). These report(s) do not provide unequivocal conclusions about association of the variant with Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cite the variant predomiantly as likely benign/benign (4x) and once as uncertain significance. Based on the evidence outlined above, the variant was classified as benign. -

Jun 30, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Thr1070Met in exon 15 of DSG2: This variant is not expected to have clinical sig nificance because it is not conserved across species, including mammals. Of note , >15 mammals have a methionine (Met) at this position. In addition, computation al prediction tools do not suggest a high likelihood of impact to the protein. I t has also been identified in 5/8274 of European American chromosomes and by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS/; dbSNP rs1496 17776). -

Cardiomyopathy

Benign:2

Jul 19, 2018

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

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 11, 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

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Arrhythmogenic right ventricular dysplasia 10;C2752072:Dilated cardiomyopathy 1BB

Benign:1

May 25, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Benign:1

Oct 20, 2016

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.061

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.61

CADD

Benign

0.65

(source)

DANN

Benign

0.81

DEOGEN2

Benign

0.089

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.0082

LIST_S2

Benign

0.29

MetaRNN

Benign

0.0036

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.090

PhyloP100

-0.53

PrimateAI

Benign

0.26

PROVEAN

Benign

0.37

REVEL

Benign

0.11

Sift

Benign

0.14

Sift4G

Benign

0.12

Polyphen

0.0030

Vest4

0.031

MVP

0.46

MPC

0.074

ClinPred

0.0051

GERP RS

-9.3

Varity_R

0.0097

gMVP

0.31

Mutation Taster

=98/2

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