chr18-31074784-G-T

Position:

• chr18-31074784-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_024422.6(DSC2):​c.1787C>A​(p.Ala596Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A596V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DSC2 NM_024422.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.44

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 Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.916

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSC2	NM_024422.6	c.1787C>A	p.Ala596Glu	missense_variant	12/16	ENST00000280904.11	NP_077740.1
DSC2	NM_004949.5	c.1787C>A	p.Ala596Glu	missense_variant	12/17		NP_004940.1
DSC2	NM_001406506.1	c.1358C>A	p.Ala453Glu	missense_variant	12/16		NP_001393435.1
DSC2	NM_001406507.1	c.1358C>A	p.Ala453Glu	missense_variant	12/17		NP_001393436.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSC2	ENST00000280904.11	c.1787C>A	p.Ala596Glu	missense_variant	12/16	1	NM_024422.6	ENSP00000280904	P1
DSC2	ENST00000251081.8	c.1787C>A	p.Ala596Glu	missense_variant	12/17	1		ENSP00000251081
DSC2	ENST00000648081.1	c.1358C>A	p.Ala453Glu	missense_variant	13/17			ENSP00000497441
DSC2	ENST00000682357.1	c.1358C>A	p.Ala453Glu	missense_variant	12/16			ENSP00000507826

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.27
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.71	D;.;.
Eigen	Pathogenic	0.68
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.91	D;D;D
M_CAP	Uncertain	0.18	D
MetaRNN	Pathogenic	0.92	D;D;D
MetaSVM	Uncertain	0.30	D
MutationAssessor	Pathogenic	3.8	H;H;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.62	T
PROVEAN	Uncertain	-3.4	D;D;.
REVEL	Uncertain	0.58
Sift	Uncertain	0.0040	D;D;.
Sift4G	Uncertain	0.013	D;D;.
Polyphen		0.95	P;D;.
Vest4		0.88
MutPred		0.73		Gain of disorder (P = 0.0211);Gain of disorder (P = 0.0211);.;
MVP		0.87
MPC		0.31
ClinPred		0.99	D
GERP RS		5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.79
gMVP		0.97

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs148185335; hg19: chr18-28654750;