18-31531035-G-A

Position:

chr18-31531035-G-A

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_001943.5(DSG2):c.1063G>A(p.Ala355Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000366 in 1,613,854 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

DSG2
NM_001943.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:3

Conservation

PhyloP100: 2.82

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 (HGNC:):

DSG2 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.15632594).

BP6

Variant 18-31531035-G-A is Benign according to our data. Variant chr18-31531035-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 191629.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=5}. Variant chr18-31531035-G-A is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSG2	NM_001943.5 linkuse as main transcript	c.1063G>A	p.Ala355Thr	missense_variant	9/15	ENST00000261590.13	NP_001934.2	Q14126
DSG2	XM_047437315.1 linkuse as main transcript	c.529G>A	p.Ala177Thr	missense_variant	10/16		XP_047293271.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSG2	ENST00000261590.13 linkuse as main transcript	c.1063G>A	p.Ala355Thr	missense_variant	9/15	1	NM_001943.5	ENSP00000261590.8		Q14126
DSG2	ENST00000683614.2 linkuse as main transcript	n.894G>A		non_coding_transcript_exon_variant	7/7					A0A804HJ09

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152066

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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

GnomAD4 exome

AF:

0.0000363

AC:

AN:

1461788

Hom.:

Cov.:

AF XY:

0.0000371

AC XY:

AN XY:

727196

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000405

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152066

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74282

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.0000655

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:

0.0000965

Hom.:

Bravo

AF:

0.0000340

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Arrhythmogenic right ventricular dysplasia 10

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 03, 2023	This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 355 of the DSG2 protein (p.Ala355Thr). This variant is present in population databases (rs201046640, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with DSG2-related conditions. ClinVar contains an entry for this variant (Variation ID: 191629). 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 not expected to disrupt DSG2 protein function with a negative predictive value of 95%. 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	Illumina Laboratory Services, Illumina	Apr 28, 2017	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). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Feb 22, 2023	Reported in a cohort not selected for arrhythmia, cardiomyopathy or family history of sudden death who underwent exome anaylsis (Ng et al., 2013); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 23861362) -
Uncertain significance, criteria provided, single submitter	research	Biesecker Lab/Clinical Genomics Section, National Institutes of Health	Jun 24, 2013	- -

Cardiac arrest

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Blueprint Genetics

Nov 18, 2015

- -

Arrhythmogenic right ventricular cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Sep 27, 2024

- -

Cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Feb 28, 2019

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 29, 2016

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.051

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.66

CADD

Benign

DANN

Benign

0.57

DEOGEN2

Benign

0.087

Eigen

Benign

-0.76

Eigen_PC

Benign

-0.48

FATHMM_MKL

Benign

0.19

LIST_S2

Benign

0.44

M_CAP

Benign

0.0062

MetaRNN

Benign

0.16

MetaSVM

Benign

-1.1

MutationAssessor

Benign

-1.0

PrimateAI

Benign

0.42

PROVEAN

Benign

0.96

REVEL

Benign

0.078

Sift

Benign

0.50

Sift4G

Benign

0.52

Polyphen

0.0010

Vest4

0.12

MVP

0.40

MPC

0.069

ClinPred

0.51

GERP RS

4.0

Varity_R

0.11

gMVP

0.28

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