rs542638302

Positions:

• chr18-31091073-C-G
• chr18-31091073-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_024422.6(DSC2):​c.429G>C​(p.Ser143=) variant causes a synonymous 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. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DSC2 NM_024422.6 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.665

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]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.75).
• BP6: Variant 18-31091073-C-G is Benign according to our data. Variant chr18-31091073-C-G is described in ClinVar as [Likely_benign]. Clinvar id is 416267.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.665 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSC2	NM_024422.6	c.429G>C	p.Ser143=	synonymous_variant	4/16	ENST00000280904.11	NP_077740.1
DSC2	NM_004949.5	c.429G>C	p.Ser143=	synonymous_variant	4/17		NP_004940.1
DSC2	NM_001406506.1	c.-1G>C		5_prime_UTR_variant	4/16		NP_001393435.1
DSC2	NM_001406507.1	c.-1G>C		5_prime_UTR_variant	4/17		NP_001393436.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSC2	ENST00000280904.11	c.429G>C	p.Ser143=	synonymous_variant	4/16	1	NM_024422.6	ENSP00000280904	P1
DSC2	ENST00000251081.8	c.429G>C	p.Ser143=	synonymous_variant	4/17	1		ENSP00000251081
DSC2	ENST00000648081.1	c.-1G>C		5_prime_UTR_variant	5/17			ENSP00000497441
DSC2	ENST00000682357.1	c.-1G>C		5_prime_UTR_variant	4/16			ENSP00000507826

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Arrhythmogenic right ventricular dysplasia 11 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 22, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.75
CADD	Benign	0.87
DANN	Benign	0.54

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		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: rs542638302; hg19: chr18-28671036;