chr18-31131789-C-T

Position:

chr18-31131789-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_024421.2(DSC1):c.2292G>A(p.Met764Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000564 in 1,614,008 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00027 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

DSC1
NM_024421.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.444

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:

ENSG00000263698 (HGNC:):

ENSG00000263698 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.017687231).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSC1	NM_024421.2 linkuse as main transcript	c.2292G>A	p.Met764Ile	missense_variant	15/16	ENST00000257198.6	NP_077739.1	Q08554-1
DSC1	NM_004948.3 linkuse as main transcript	c.2292G>A	p.Met764Ile	missense_variant	15/17		NP_004939.1	Q08554-2Q9HB00
DSCAS	NR_110785.1 linkuse as main transcript	n.209-19010C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
DSC1	ENST00000257198.6 linkuse as main transcript	c.2292G>A	p.Met764Ile	missense_variant	15/16	2	NM_024421.2	ENSP00000257198.6	Q08554-1
DSC1	ENST00000257197.7 linkuse as main transcript	c.2292G>A	p.Met764Ile	missense_variant	15/17	1		ENSP00000257197.3	Q08554-2
ENSG00000263698	ENST00000582307.1 linkuse as main transcript	n.334C>T		non_coding_transcript_exon_variant	1/1	6
DSCAS	ENST00000581836.2 linkuse as main transcript	n.225-19010C>T		intron_variant		4

Frequencies

GnomAD3 genomes

AF:

0.000269

AC:

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000941

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.0000716

AC:

AN:

251306

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135810

show subpopulations

Gnomad AFR exome

AF:

0.000984

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

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:

0.0000342

AC:

AN:

1461810

Hom.:

Cov.:

AF XY:

0.0000303

AC XY:

AN XY:

727204

show subpopulations

Gnomad4 AFR exome

AF:

0.00125

Gnomad4 AMR exome

AF:

0.0000895

Gnomad4 ASJ exome

AF:

0.00

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:

0.0000662

GnomAD4 genome

AF:

0.000269

AC:

AN:

152198

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.000941

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000956

Alfa

AF:

0.000158

Hom.:

Bravo

AF:

0.000321

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000906

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 19, 2024

The c.2292G>A (p.M764I) alteration is located in exon 15 (coding exon 15) of the DSC1 gene. This alteration results from a G to A substitution at nucleotide position 2292, causing the methionine (M) at amino acid position 764 to be replaced by an isoleucine (I). 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

Benign

0.11

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.65

CADD

Benign

DANN

Benign

0.92

DEOGEN2

Benign

0.066

.;T

Eigen

Benign

-0.97

Eigen_PC

Benign

-0.84

FATHMM_MKL

Benign

0.025

LIST_S2

Benign

0.63

T;T

M_CAP

Benign

0.0045

MetaRNN

Benign

0.018

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

N;N

PrimateAI

Benign

0.32

PROVEAN

Benign

-0.34

N;N

REVEL

Benign

0.14

Sift

Benign

0.41

T;T

Sift4G

Benign

0.40

T;T

Polyphen

0.0

.;B

Vest4

0.13

MutPred

0.44

Loss of disorder (P = 0.06);Loss of disorder (P = 0.06);

MVP

0.35

MPC

0.068

ClinPred

0.024

GERP RS

-1.4

Varity_R

0.13

gMVP

0.33

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