18-31093571-G-C

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_024422.6(DSC2):c.142C>G(p.Leu48Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000689 in 1,452,394 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L48F) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

DSC2
NM_024422.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.80

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

familial isolated arrhythmogenic right ventricular dysplasia
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
arrhythmogenic right ventricular dysplasia 11
Inheritance: AR, AD, SD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
colorectal adenoma
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

DSC2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1450212).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
DSC2	NM_024422.6 link	c.142C>G	p.Leu48Val	missense_variant	Exon 2 of 16	ENST00000280904.11	NP_077740.1
DSC2	NM_004949.5 link	c.142C>G	p.Leu48Val	missense_variant	Exon 2 of 17		NP_004940.1
DSC2	NM_001406506.1 link	c.-288C>G		5_prime_UTR_variant	Exon 2 of 16		NP_001393435.1
DSC2	NM_001406507.1 link	c.-288C>G		5_prime_UTR_variant	Exon 2 of 17		NP_001393436.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DSC2	ENST00000280904.11 link	c.142C>G	p.Leu48Val	missense_variant	Exon 2 of 16	1	NM_024422.6	ENSP00000280904.6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251306

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

6.89e-7

AC:

AN:

1452394

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

722738

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33228

American (AMR)

AF:

0.0000225

AC:

AN:

44490

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25742

East Asian (EAS)

AF:

0.00

AC:

AN:

39286

South Asian (SAS)

AF:

0.00

AC:

AN:

85934

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52480

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5708

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1105718

Other (OTH)

AF:

0.00

AC:

AN:

59808

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Arrhythmogenic right ventricular dysplasia 11

Uncertain:1

Nov 11, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with DSC2-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.003%). This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 48 of the DSC2 protein (p.Leu48Val).

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.073

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.55

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.052

T;.

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.54

FATHMM_MKL

Benign

0.67

LIST_S2

Benign

0.65

T;T

M_CAP

Benign

0.023

MetaRNN

Benign

0.15

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

L;L

PhyloP100

1.8

PrimateAI

Benign

0.31

PROVEAN

Benign

-1.2

N;N

REVEL

Benign

0.027

Sift

Benign

0.064

T;T

Sift4G

Benign

0.070

T;T

Vest4

0.19

ClinPred

0.12

GERP RS

1.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.051

gMVP

0.35

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over