rs200802591

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_024422.6(DSC2):c.865C>T(p.Pro289Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000155 in 1,614,116 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P289A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

DSC2
NM_024422.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:10

Conservation

PhyloP100: 5.03

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 Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
DSC2	NM_024422.6 linkuse as main transcript	c.865C>T	p.Pro289Ser	missense_variant	7/16	ENST00000280904.11
DSC2	NM_004949.5 linkuse as main transcript	c.865C>T	p.Pro289Ser	missense_variant	7/17
DSC2	NM_001406506.1 linkuse as main transcript	c.436C>T	p.Pro146Ser	missense_variant	7/16
DSC2	NM_001406507.1 linkuse as main transcript	c.436C>T	p.Pro146Ser	missense_variant	7/17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSC2	ENST00000280904.11 linkuse as main transcript	c.865C>T	p.Pro289Ser	missense_variant	7/16	1	NM_024422.6	P1	Q02487-1
DSC2	ENST00000251081.8 linkuse as main transcript	c.865C>T	p.Pro289Ser	missense_variant	7/17	1			Q02487-2
DSC2	ENST00000648081.1 linkuse as main transcript	c.436C>T	p.Pro146Ser	missense_variant	8/17
DSC2	ENST00000682357.1 linkuse as main transcript	c.436C>T	p.Pro146Ser	missense_variant	7/16

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000278

AC:

AN:

251400

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135866

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000616

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1461860

Hom.:

Cov.:

AF XY:

0.0000165

AC XY:

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.0000187

Gnomad4 NFE exome

AF:

0.0000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74430

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000559

Hom.:

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:10

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Arrhythmogenic right ventricular dysplasia 11

Uncertain:4

Uncertain significance, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Oct 22, 2023	This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 289 of the DSC2 protein (p.Pro289Ser). This variant is present in population databases (rs200802591, gnomAD 0.006%). This missense change has been observed in individual(s) with clinical features of arrhythmogenic right ventricular cardiomyopathy (PMID: 20031616, 30847666, 32880476). ClinVar contains an entry for this variant (Variation ID: 46200). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt DSC2 protein function. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Jan 25, 2017	- -

not provided

Uncertain:3

Uncertain significance, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Sep 30, 2019	Reported in one Dutch individual diagnosed with probable ARVC based on Task Force Criteria (Bhuiyan et al., 2009); Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID#46200; 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: 32880476, 30847666, 20031616) -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Dec 14, 2010

Variant classified as Uncertain Significance - Favor Pathogenic. The Pro289Ser v ariant has been reported in one individual with possible ARVD/C and was absent f rom 300 ethnically matched control chromosomes (Bhuiyan 2009). Proline (Pro) at position 289 is conserved across in mammals (more distant species were not avail able. In addition, three computer programs (AlignGCGD, PolyPhen, SIFT) predict t he variant to significantly affect the protein?s function. While the absence fro m controls and the limited evolutionary conservation data available support a pa thogenic role, the number of controls tested is not high enough to exclude that the variant is benign. In summary, the significance of the Pro289Ser variant c annot be determined without additional studies. -

Cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Dec 21, 2022

This missense variant replaces proline with serine at codon 289 of the DSC2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with arrhythmogenic right ventricular cardiomyopathy (PMID: 20031616) and in an individual affected with dilated cardiomyopathy (Verdonschot 2021, disertation, Maastricht University). This variant has also been identified in 8/282798 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. -

Familial isolated arrhythmogenic right ventricular dysplasia

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Nov 28, 2023

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.27

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.39

T;.;.

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.87

D;D;D

M_CAP

Benign

0.057

MetaRNN

Uncertain

0.50

T;T;T

MetaSVM

Benign

-0.51

MutationAssessor

Benign

1.8

L;L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.39

PROVEAN

Pathogenic

-5.6

D;D;.

REVEL

Uncertain

0.41

Sift

Uncertain

0.0030

D;D;.

Sift4G

Uncertain

0.0090

D;D;.

Polyphen

1.0

D;D;.

Vest4

0.46

MVP

0.77

MPC

0.43

ClinPred

0.60

GERP RS

5.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.44

gMVP

0.79

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

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