rs727502979

Variant names:

• chr18-31069139-C-T
• rs727502979
• NM_024422.6:c.2263G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_024422.6(DSC2):​c.2263G>A​(p.Gly755Ser) 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. 16/22 in silico tools predict a benign outcome for this variant. 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. G755V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DSC2 NM_024422.6 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:4
• Conservation: PhyloP100: 2.11
• Publications: 1 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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12781212).

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.2263G>A	p.Gly755Ser	missense	Exon 15 of 16	NP_077740.1	Q02487-1
	DSC2	NM_004949.5		c.2263G>A	p.Gly755Ser	missense	Exon 15 of 17	NP_004940.1	Q02487-2
	DSC2	NM_001406506.1		c.1834G>A	p.Gly612Ser	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.2263G>A	p.Gly755Ser	missense	Exon 15 of 16	ENSP00000280904.6	Q02487-1
	DSC2	ENST00000251081.8	TSL:1	c.2263G>A	p.Gly755Ser	missense	Exon 15 of 17	ENSP00000251081.6	Q02487-2
	DSC2	ENST00000713707.1		c.2284G>A	p.Gly762Ser	missense	Exon 15 of 16	ENSP00000519010.1	A0AAQ5BGP6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	not specified (2)
-	1	-	Cardiovascular phenotype (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.076
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	17
DANN	Benign	0.97
DEOGEN2	Benign	0.048	T
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.34
FATHMM_MKL	Benign	0.49	N
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.047	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		2.1
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.12
Sift	Benign	0.55	T
Sift4G	Benign	0.31	T
Polyphen		0.45	B
Vest4		0.070
MutPred		0.39		Gain of sheet (P = 0.0221)
MVP		0.67
MPC		0.18
ClinPred		0.16	T
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.038
gMVP		0.57
Mutation Taster		=96/4	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs727502979; hg19: chr18-28649105;