Genetic Variant DSC1:p.Asp727Gly (chr18-31132626-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_024421.2(DSC1):c.2180A>G(p.Asp727Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,334 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

DSC1
NM_024421.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.88

Variant links:

Genes affected

DSC1 (HGNC:3035): (desmocollin 1) The protein encoded by this gene is a calcium-dependent glycoprotein that is a member of the desmocollin subfamily of the cadherin superfamily. These desmosomal family members, along with the desmogleins, are found primarily in epithelial cells where they constitute the adhesive proteins of the desmosome cell-cell junction and are required for cell adhesion and desmosome formation. A subtype of IgA pemphigus, a life-threatening autoimmune disease, is characterized by the presence of autoantibodies that target the encoded protein. The desmosomal family members are arranged in two clusters on chromosome 18. Alternative splicing of this gene results in multiple transcript variants. At least one of these variants encodes a preproprotein that is proteolytically processed to generate the mature protein. [provided by RefSeq, Nov 2015]

DSC1 links:

DSCAS (HGNC:51116): (DSC1/DSC2 antisense RNA)

DSCAS links:

ENSG00000263698 (HGNC:):

ENSG00000263698 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DSC1	NM_024421.2 link	c.2180A>G	p.Asp727Gly	missense_variant	Exon 14 of 16	ENST00000257198.6	NP_077739.1	Q08554-1
DSC1	NM_004948.3 link	c.2180A>G	p.Asp727Gly	missense_variant	Exon 14 of 17		NP_004939.1	Q08554-2Q9HB00
DSCAS	NR_110785.1 link	n.209-18173T>C		intron_variant	Intron 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DSC1	ENST00000257198.6 link	c.2180A>G	p.Asp727Gly	missense_variant	Exon 14 of 16	2	NM_024421.2	ENSP00000257198.6	Q08554-1
DSC1	ENST00000257197.7 link	c.2180A>G	p.Asp727Gly	missense_variant	Exon 14 of 17	1		ENSP00000257197.3	Q08554-2
DSCAS	ENST00000581836.2 link	n.225-18173T>C		intron_variant	Intron 2 of 3	4
ENSG00000263698	ENST00000582307.1 link	n.*132T>C		downstream_gene_variant		6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251198

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135774

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461334

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726970

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 08, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2180A>G (p.D727G) alteration is located in exon 14 (coding exon 14) of the DSC1 gene. This alteration results from a A to G substitution at nucleotide position 2180, causing the aspartic acid (D) at amino acid position 727 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.57

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.050

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.36

.;T

Eigen

Pathogenic

0.77

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.98

D;D

M_CAP

Uncertain

0.099

MetaRNN

Uncertain

0.64

D;D

MetaSVM

Uncertain

0.032

MutationAssessor

Uncertain

2.8

M;M

PrimateAI

Uncertain

0.48

PROVEAN

Pathogenic

-5.9

D;D

REVEL

Uncertain

0.38

Sift

Uncertain

0.0040

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.58

MutPred

0.35

Loss of sheet (P = 0.1158);Loss of sheet (P = 0.1158);

MVP

0.86

MPC

0.44

ClinPred

0.99

GERP RS

5.6

Varity_R

0.74

gMVP

0.74

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over