rs141163578

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PP3

The NM_004415.4(DSP):c.1103T>C(p.Ile368Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000304 in 1,614,114 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I368F) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

DSP
NM_004415.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 8.01

Variant links:

Genes affected

DSP (HGNC:3052): (desmoplakin) This gene encodes a protein that anchors intermediate filaments to desmosomal plaques and forms an obligate component of functional desmosomes. Mutations in this gene are the cause of several cardiomyopathies and keratodermas, including skin fragility-woolly hair syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

DSP links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.809

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
DSP	NM_004415.4 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/24	ENST00000379802.8
DSP	NM_001319034.2 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/24
DSP	NM_001008844.3 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/24
DSP	NM_001406591.1 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSP	ENST00000379802.8 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/24	1	NM_004415.4	P2	P15924-1
DSP	ENST00000418664.2 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/24	1		A2	P15924-2
DSP	ENST00000710359.1 linkuse as main transcript	c.1103T>C	p.Ile368Thr	missense_variant	9/24			A2
DSP	ENST00000682228.1 linkuse as main transcript	n.427T>C		non_coding_transcript_exon_variant	3/3

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000438

AC:

AN:

251268

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135806

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:

0.0000463

Gnomad NFE exome

AF:

0.0000792

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000301

AC:

AN:

1461788

Hom.:

Cov.:

AF XY:

0.0000303

AC XY:

AN XY:

727198

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.0000375

Gnomad4 NFE exome

AF:

0.0000315

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000102

Hom.:

Bravo

AF:

0.0000340

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Arrhythmogenic cardiomyopathy with wooly hair and keratoderma

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Jan 11, 2024

This missense variant replaces isoleucine with threonine at codon 368 of the DSP protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with sudden infant death (PMID: 26272908), in an individual affected with Brugada syndrome (PMID: 26220970), and in an individual affected arrhythmogenic right ventricular cardiomyopathy (PMID: 27532257). This variant has also been identified in 12/282674 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Jun 08, 2023

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Aug 07, 2020

Reported in a patient with Brugada syndrome in the literature (Di Resta et al., 2015), but clinical information and segregation information not available; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 31402444, 27532257, 26220970) -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 30, 2023

The p.I368T variant (also known as c.1103T>C), located in coding exon 9 of the DSP gene, results from a T to C substitution at nucleotide position 1103. The isoleucine at codon 368 is replaced by threonine, an amino acid with similar properties. This alteration has been reported in cardiomyopathy cohorts, as well as a sudden unexplained death cohort and a Brugada syndrome cohort (Santori M et al. Arch Dis Child, 2015 Oct;100:952-6; Di Resta C et al. Hum Mol Genet, 2015 Oct;24:5828-35; Walsh R et al. Genet Med, 2017 02;19:192-203; Goli R et al. Circulation, 2021 May;143:1852-1862; Ware SM et al. Am J Hum Genet, 2022 Feb;109:282-298). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Woolly hair-skin fragility syndrome;C1843896:Arrhythmogenic right ventricular dysplasia 8;C1852127:Keratosis palmoplantaris striata 2;C1854063:Arrhythmogenic cardiomyopathy with wooly hair and keratoderma;C1864826:Lethal acantholytic epidermolysis bullosa;C4014393:Cardiomyopathy, dilated, with wooly hair, keratoderma, and tooth agenesis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Nov 17, 2021

- -

Arrhythmogenic right ventricular dysplasia 8;C1854063:Arrhythmogenic cardiomyopathy with wooly hair and keratoderma

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 08, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.43

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Pathogenic

0.85

D;.

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.94

D;D

M_CAP

Uncertain

0.22

MetaRNN

Pathogenic

0.81

D;D

MetaSVM

Pathogenic

0.83

MutationAssessor

Uncertain

2.4

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.84

PROVEAN

Uncertain

-3.8

D;D

REVEL

Pathogenic

0.87

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

1.0

D;.

Vest4

0.80

MVP

0.95

MPC

0.93

ClinPred

0.84

GERP RS

5.3

Varity_R

0.75

gMVP

0.49

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