18-31069084-C-A

Variant names:

• chr18-31069084-C-A
• rs749174176
• NM_024422.6:c.2318G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_024422.6(DSC2):​c.2318G>T​(p.Gly773Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. G773A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DSC2 NM_024422.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.79
• Publications: 0 publications found

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):

• arrhythmogenic right ventricular dysplasia 11

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

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• colorectal adenoma

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024422.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DSC2	NM_024422.6	MANE Select	c.2318G>T	p.Gly773Val	missense	Exon 15 of 16	NP_077740.1	Q02487-1
	DSC2	NM_004949.5		c.2318G>T	p.Gly773Val	missense	Exon 15 of 17	NP_004940.1	Q02487-2
	DSC2	NM_001406506.1		c.1889G>T	p.Gly630Val	missense	Exon 15 of 16	NP_001393435.1	A0A3B3ISU0

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DSC2	ENST00000280904.11	TSL:1 MANE Select	c.2318G>T	p.Gly773Val	missense	Exon 15 of 16	ENSP00000280904.6	Q02487-1
	DSC2	ENST00000251081.8	TSL:1	c.2318G>T	p.Gly773Val	missense	Exon 15 of 17	ENSP00000251081.6	Q02487-2
	DSC2	ENST00000713707.1		c.2339G>T	p.Gly780Val	missense	Exon 15 of 16	ENSP00000519010.1	A0AAQ5BGP6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Cardiomyopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Benign	19
DANN	Uncertain	1.0
DEOGEN2	Benign	0.36	T
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.86	D
M_CAP	Uncertain	0.15	D
MetaRNN	Uncertain	0.57	D
MetaSVM	Uncertain	-0.17	T
MutationAssessor	Pathogenic	3.0	M
PhyloP100		1.8
PrimateAI	Benign	0.38	T
PROVEAN	Pathogenic	-5.2	D
REVEL	Uncertain	0.33
Sift	Uncertain	0.0050	D
Sift4G	Uncertain	0.0070	D
Polyphen		0.84	P
Vest4		0.33
MutPred		0.45		Loss of sheet (P = 0.0181)
MVP		0.86
MPC		0.23
ClinPred		0.96	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.46
gMVP		0.63
Mutation Taster		=70/30	polymorphism

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

Other links and lift over

dbSNP: rs749174176; hg19: chr18-28649050;