18-31542823-G-T

Variant names:

• chr18-31542823-G-T
• rs371146201
• NM_001943.5:c.2305G>T

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_001943.5(DSG2):​c.2305G>T​(p.Glu769*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000000794 in 1,260,006 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.9e-7 (0 hom.)
• Consequence: DSG2 NM_001943.5 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.81
• Publications: 0 publications found

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

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 30 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DSG2	NM_001943.5	c.2305G>T	p.Glu769*	stop_gained	Exon 14 of 15	ENST00000261590.13	NP_001934.2
DSG2	XM_047437315.1	c.1771G>T	p.Glu591*	stop_gained	Exon 15 of 16		XP_047293271.1
DSG2-AS1	NR_045216.1	n.1810+279C>A		intron_variant	Intron 5 of 5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DSG2	ENST00000261590.13	c.2305G>T	p.Glu769*	stop_gained	Exon 14 of 15	1	NM_001943.5	ENSP00000261590.8

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.94e-7 AC: 1 AN: 1260006 Hom.: 0 Cov.: 33 AF XY: 0.00000161 AC XY: 1 AN XY: 620430

African (AFR) AF: 0.00 AC: 0 AN: 26620

American (AMR) AF: 0.00 AC: 0 AN: 30786

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 17776

East Asian (EAS) AF: 0.00 AC: 0 AN: 24790

South Asian (SAS) AF: 0.00 AC: 0 AN: 78012

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 39576

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4716

European-Non Finnish (NFE) AF: 0.00000101 AC: 1 AN: 989926

Other (OTH) AF: 0.00 AC: 0 AN: 47804

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.66
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		3.8
Vest4		0.82
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=4/196	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.26		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.26		Position offset: 29

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs371146201; hg19: chr18-29122786;