chr18-31538787-T-G

Position:

chr18-31538787-T-G

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_001943.5(DSG2):c.1688T>G(p.Leu563Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000297 in 1,614,156 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L563P) has been classified as Uncertain significance.

Frequency

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

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

DSG2
NM_001943.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:6

Conservation

PhyloP100: -0.998

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012969822).

BP6

Variant 18-31538787-T-G is Benign according to our data. Variant chr18-31538787-T-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 228630.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Uncertain_significance=1, Benign=1}.

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DSG2	NM_001943.5 linkuse as main transcript	c.1688T>G	p.Leu563Arg	missense_variant	12/15	ENST00000261590.13
DSG2	XM_047437315.1 linkuse as main transcript	c.1154T>G	p.Leu385Arg	missense_variant	13/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSG2	ENST00000261590.13 linkuse as main transcript	c.1688T>G	p.Leu563Arg	missense_variant	12/15	1	NM_001943.5	P1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152154

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:

0.00115

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:

0.000112

AC:

AN:

249226

Hom.:

AF XY:

0.000141

AC XY:

AN XY:

135208

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00156

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:

0.0000287

AC:

AN:

1461884

Hom.:

Cov.:

AF XY:

0.0000289

AC XY:

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00103

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74452

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00116

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000680

Hom.:

Bravo

AF:

0.0000907

ExAC

AF:

0.0000745

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Apr 13, 2015	Variant classified as Uncertain Significance - Favor Benign. The p.Leu563Arg var iant in DSG2 has not been previously reported in individuals with cardiomyopathy , but has been identified in 0.1% (9/8594) East Asian chromosomes by the Exome A ggregation Consortium Sequencing Project (http://exac.broadinstitute.org). Leuci ne (Leu) at position 563 is not conserved in mammals or evolutionarily distant s pecies and the mouse carries arginine (Arg) at this position, raising the possib ility that this change may be tolerated. In summary, while the clinical signific ance of the p.Leu563Arg variant is uncertain, its frequency and the presence of the variant amino acid in another mammal suggests that it is more likely to be b enign. -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 27, 2016	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Likely benign, criteria provided, single submitter	clinical testing	Phosphorus, Inc.	Jan 19, 2022	This missense variant results in an amino acid substitution of Leucine with Arginine at codon 563 of the DSG2 gene (transcript: NM_001943.3). This variant has an entry in ClinVar (228630) NM_001943.5(DSG2):c.1688T>G (p.Leu563Arg). This variant occurred in gnomAD with a total MAF of 0.0110% and with the highest MAF of 0.1566% in the East Asian population. This position is not conserved. In silico functional algorithms predict this variant to be benign (PolyPhen) and tolerated (SIFT). However, no functional studies were performed to confirm either of those predictions. The variant has not occurred in the literature in association with the disease. Considering that the variant has a relatively high frequency in the subpopulation, it has been classified as Likely Benign. -

Cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

May 24, 2019

- -

Arrhythmogenic right ventricular dysplasia 10

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 22, 2023

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Mar 06, 2017

Variant summary: The DSG2 c.1688T>G (p.Leu563Arg) variant involves the alteration of a non-conserved nucleotide. 4/5 in silico tools predict a benign outcome for this variant. This variant was found in 9/120636 control chromosomes, predominantly observed in the East Asian subpopulation at a frequency of 0.001047 (9/8594). This frequency is about 105 times the estimated maximal expected allele frequency of a pathogenic DSG2 variant (0.00001), suggesting this is likely a benign polymorphism found primarily in the populations of East Asian origin. This variant has been reported in a Japanese individual with West syndrome without evidence for causality (Hino-Fukuyo_2015). Another clinical diagnostic laboratory classified this variant as uncertain significance, without evidence for independent evaluation. Taken together, this variant is classified as likely benign. -

Cardiovascular phenotype

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2023

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

0.077

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.55

CADD

Benign

DANN

Benign

0.67

DEOGEN2

Benign

0.12

Eigen

Benign

-1.0

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.12

LIST_S2

Benign

0.53

M_CAP

Benign

0.038

MetaRNN

Benign

0.013

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

MutationTaster

Benign

1.0

PrimateAI

Benign

0.25

PROVEAN

Benign

-0.89

REVEL

Benign

0.024

Sift

Benign

0.36

Sift4G

Benign

0.53

Polyphen

0.0060

Vest4

0.21

MutPred

0.36

Gain of disorder (P = 0.0312);

MVP

0.59

MPC

0.11

ClinPred

0.0070

GERP RS

-0.66

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.070

gMVP

0.63

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