rs1555628211

Positions:

• chr18-31546031-A-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000261590.13(DSG2):​c.2645A>C​(p.Tyr882Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DSG2 ENST00000261590.13 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0520

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-AS1 (HGNC:51311): (DSG2 antisense RNA 1)

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06539333).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSG2	NM_001943.5	c.2645A>C	p.Tyr882Ser	missense_variant	15/15	ENST00000261590.13	NP_001934.2
DSG2-AS1	NR_045216.1	n.1346-125T>G		intron_variant, non_coding_transcript_variant
DSG2	XM_047437315.1	c.2111A>C	p.Tyr704Ser	missense_variant	16/16		XP_047293271.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSG2	ENST00000261590.13	c.2645A>C	p.Tyr882Ser	missense_variant	15/15	1	NM_001943.5	ENSP00000261590	P1
DSG2-AS1	ENST00000583706.5	n.1384-125T>G		intron_variant, non_coding_transcript_variant		5
DSG2-AS1	ENST00000657343.1	n.697-125T>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Arrhythmogenic right ventricular dysplasia 10 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 05, 2017

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 output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The serine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with DSG2-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces tyrosine with serine at codon 882 of the DSG2 protein (p.Tyr882Ser). The tyrosine residue is moderately conserved and there is a large physicochemical difference between tyrosine and serine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	9.0
DANN	Benign	0.75
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.96
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.073	N
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.065	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-0.85	N
REVEL	Benign	0.052
Sift	Benign	0.38	T
Sift4G	Benign	0.35	T
Polyphen		0.010	B
Vest4		0.18
MutPred		0.21		Gain of relative solvent accessibility (P = 0.0166);
MVP		0.61
MPC		0.11
ClinPred		0.026	T
GERP RS		-0.39
Varity_R		0.086
gMVP		0.23

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

Other links and lift over

dbSNP: rs1555628211; hg19: chr18-29125994;