dbSNP rs267606775: DSG4:p.Ser192Thr (chr18-31390712-T-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PM5

The NM_177986.5(DSG4):c.574T>A(p.Ser192Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,528 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. S192P) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

DSG4
NM_177986.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.42

Publications

3 publications found

Variant links:

Genes affected

DSG4 (HGNC:21307): (desmoglein 4) This gene encodes a member of the desmoglein subgroup of desmosomal cadherins. The encoded preproprotein is proteolytically processed to generate the mature protein. This protein is a transmembrane component of desmosomes and may play a role in cell-cell adhesion in epithelial cells. Mutations in the gene are associated with localized autosomal recessive hypotrichosis and monilethrix, characterized by impaired hair growth. [provided by RefSeq, May 2016]

DSG4 links:

DSG1-AS1 (HGNC:51115): (DSG1 antisense RNA 1)

DSG1-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr18-31390712-T-C is described in CliVar as Pathogenic. Clinvar id is 2721.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DSG4	NM_177986.5 link	c.574T>A	p.Ser192Thr	missense_variant	Exon 6 of 16	ENST00000308128.9	NP_817123.1	Q86SJ6-1
DSG4	NM_001134453.3 link	c.574T>A	p.Ser192Thr	missense_variant	Exon 6 of 15		NP_001127925.1	Q86SJ6-2
DSG1-AS1	NR_110788.1 link	n.156+36121A>T		intron_variant	Intron 1 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DSG4	ENST00000308128.9 link	c.574T>A	p.Ser192Thr	missense_variant	Exon 6 of 16	1	NM_177986.5	ENSP00000311859.4		Q86SJ6-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250628

AF XY:

0.00000738

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000885

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461528

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727078

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39674

South Asian (SAS)

AF:

0.00

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111758

Other (OTH)

AF:

0.00

AC:

AN:

60380

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.275

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.71

BayesDel_addAF

Uncertain

0.033

BayesDel_noAF

Benign

-0.19

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

T;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.88

D;D

M_CAP

Benign

0.024

MetaRNN

Uncertain

0.55

D;D

MetaSVM

Benign

-0.59

MutationAssessor

Uncertain

2.1

M;M

PhyloP100

2.4

PrimateAI

Uncertain

0.55

PROVEAN

Uncertain

-2.8

D;D

REVEL

Uncertain

0.38

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.0040

D;D

Polyphen

0.97

D;D

Vest4

0.45

MutPred

0.80

Loss of ubiquitination at K193 (P = 0.0834);Loss of ubiquitination at K193 (P = 0.0834);

MVP

0.59

MPC

0.24

ClinPred

0.95

GERP RS

6.0

Varity_R

0.44

gMVP

0.39

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over