chr18-31082955-C-A

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_024422.6(DSC2):c.1048G>T(p.Asp350Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.0000031 in 1,613,396 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

DSC2
NM_024422.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 6.47

Variant links:

Genes affected

DSC2 (HGNC:3036): (desmocollin 2) This gene encodes a member of the desmocollin protein subfamily. Desmocollins, along with desmogleins, are cadherin-like transmembrane glycoproteins that are major components of the desmosome. Desmosomes are cell-cell junctions that help resist shearing forces and are found in high concentrations in cells subject to mechanical stress. This gene is found in a cluster with other desmocollin family members on chromosome 18. Mutations in this gene are associated with arrhythmogenic right ventricular dysplasia-11, and reduced protein expression has been described in several types of cancer. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2015]

DSC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.985

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DSC2	NM_024422.6 link	c.1048G>T	p.Asp350Tyr	missense_variant	Exon 8 of 16	ENST00000280904.11	NP_077740.1	Q02487-1
DSC2	NM_004949.5 link	c.1048G>T	p.Asp350Tyr	missense_variant	Exon 8 of 17		NP_004940.1	Q02487-2
DSC2	NM_001406506.1 link	c.619G>T	p.Asp207Tyr	missense_variant	Exon 8 of 16		NP_001393435.1
DSC2	NM_001406507.1 link	c.619G>T	p.Asp207Tyr	missense_variant	Exon 8 of 17		NP_001393436.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DSC2	ENST00000280904.11 link	c.1048G>T	p.Asp350Tyr	missense_variant	Exon 8 of 16	1	NM_024422.6	ENSP00000280904.6	Q02487-1
DSC2	ENST00000251081.8 link	c.1048G>T	p.Asp350Tyr	missense_variant	Exon 8 of 17	1		ENSP00000251081.6	Q02487-2
DSC2	ENST00000648081.1 link	c.619G>T	p.Asp207Tyr	missense_variant	Exon 9 of 17			ENSP00000497441.1	A0A3B3ISU0
DSC2	ENST00000682357.1 link	c.619G>T	p.Asp207Tyr	missense_variant	Exon 8 of 16			ENSP00000507826.1	A0A3B3ISU0

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251044

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135706

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461216

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726918

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000312

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 04, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Asp350Tyr variant in DSC2 has been reported in 1 Caucasian adult with prob able ARVC (diagnosed upon myocardial biopsy) as well as two siblings with abnorm al ECGs (Bhuiyan 2009). This variant has also been identified in 1/10436 African chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitu te.org). Computational prediction tools and conservation analysis suggest that i t may impact the protein, though this information is not predictive enough to de termine pathogenicity. In summary, the clinical significance of the p.Asp350Tyr variant is uncertain. -

Arrhythmogenic right ventricular dysplasia 11

Uncertain:1

Oct 07, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiomyopathy

Uncertain:1

Sep 15, 2020

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces aspartic acid with tyrosine at codon 350 of the DSC2 protein. Computational prediction is inconclusive regarding the impact of this variant on protein structure and function (internally defined REVEL score threshold 0.5 < inconclusive < 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with probably arrhythmogenic right ventricular cardiomyopathy as well as two siblings with abnormal ECGs (PMID: 20031616). This variant has also been reported in an individual without a diagnosis of arrhythmogenic right ventricular cardiomyopathy (PMID: 28471438). This variant has been identified in 2/282446 chromosomes in the general population by the Genome Aggregation Database (gnomAD). 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. -

not provided

Uncertain:1

Aug 15, 2019

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported in one female with a probable diagnosis of ARVC per task force criteria in published literature (Bhuiyan et al., 2009); this variant was also found in her two siblings with positive findings on signal-averaged electrocardiogram; Also identified as an incidental finding in 1/30,716 individuals who underwent exome sequencing (Haggerty et al., 2017); although a follow-up cardiac evaluation was not reported; Reported in ClinVar as a variant of uncertain significance but additional evidence is not available (ClinVar Variant ID# 228620; Landrum et al., 2016); Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 20031616, 23071725, 28471438, 31402444) -

Familial isolated arrhythmogenic right ventricular dysplasia

Uncertain:1

May 14, 2024

All of Us Research Program, National Institutes of Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.94

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.31

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.73

D;.;.

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.88

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

D;D;D

M_CAP

Pathogenic

0.31

MetaRNN

Pathogenic

0.99

D;D;D

MetaSVM

Uncertain

0.70

MutationAssessor

Pathogenic

4.5

H;H;.

PrimateAI

Uncertain

0.53

PROVEAN

Pathogenic

-8.1

D;D;.

REVEL

Uncertain

0.63

Sift

Pathogenic

0.0

D;D;.

Sift4G

Pathogenic

0.0010

D;D;.

Polyphen

1.0

D;D;.

Vest4

0.99

MutPred

0.93

Loss of phosphorylation at T354 (P = 0.207);Loss of phosphorylation at T354 (P = 0.207);.;

MVP

0.92

MPC

0.47

ClinPred

0.99

GERP RS

5.4

Varity_R

0.98

gMVP

0.94

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over