rs535202724

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_004415.4(DSP):c.3650C>T(p.Thr1217Met) variant causes a missense change. The variant allele was found at a frequency of 0.000196 in 1,614,058 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign 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. T1217S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 1 hom. )

Consequence

DSP
NM_004415.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:13

Conservation

PhyloP100: 4.06

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 Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011782467).

BP6

Variant 6-7579840-C-T is Benign according to our data. Variant chr6-7579840-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 163266.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=8, Benign=1, Uncertain_significance=1}. Variant chr6-7579840-C-T is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
DSP	NM_004415.4 linkuse as main transcript	c.3650C>T	p.Thr1217Met	missense_variant	23/24	ENST00000379802.8
DSP	NM_001319034.2 linkuse as main transcript	c.3650C>T	p.Thr1217Met	missense_variant	23/24
DSP	NM_001008844.3 linkuse as main transcript	c.3582+68C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSP	ENST00000379802.8 linkuse as main transcript	c.3650C>T	p.Thr1217Met	missense_variant	23/24	1	NM_004415.4	P2	P15924-1
DSP	ENST00000418664.2 linkuse as main transcript	c.3582+68C>T		intron_variant		1		A2	P15924-2
DSP	ENST00000710359.1 linkuse as main transcript	c.3650C>T	p.Thr1217Met	missense_variant	23/24			A2

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152082

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00456

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000346

AC:

AN:

251138

Hom.:

AF XY:

0.000442

AC XY:

AN XY:

135760

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00271

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000199

AC:

291

AN:

1461858

Hom.:

Cov.:

AF XY:

0.000256

AC XY:

186

AN XY:

727226

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00238

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000629

Gnomad4 OTH exome

AF:

0.000215

GnomAD4 genome

AF:

0.000171

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.000228

AC XY:

AN XY:

74408

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00457

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000400

Hom.:

Bravo

AF:

0.0000529

ExAC

AF:

0.000469

AC:

Asia WGS

AF:

0.00260

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:13

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:4

Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 27, 2020	This variant is associated with the following publications: (PMID: 24704780) -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jul 26, 2019	The p.Thr1217Met variant in DSP is classified as benign because it has been identified in 0.3% (83/30592) of South Asian chromosomes by gnomAD (http://gnomad.broadinstitute.org). Computational prediction tools and conservation analysis suggest that this variant may not impact the protein. ACMG/AMP Criteria applied: BA1, BP4. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Arrhythmogenic right ventricular dysplasia 8

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Arrhythmogenic cardiomyopathy with wooly hair and keratoderma

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Dec 18, 2023

- -

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 27, 2024

- -

Cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Oct 10, 2018

- -

Lethal acantholytic epidermolysis bullosa

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Woolly hair-skin fragility syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Primary dilated cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

research

Genetics and Genomics Program, Sidra Medicine

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 30, 2016

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.12

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Benign

0.36

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.91

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.012

MetaSVM

Uncertain

0.20

MutationAssessor

Benign

1.7

MutationTaster

Benign

0.87

D;D

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-1.2

REVEL

Uncertain

0.29

Sift

Benign

0.035

Sift4G

Benign

0.10

Polyphen

0.96

Vest4

0.29

MutPred

0.16

Loss of methylation at K1218 (P = 0.033);

MVP

0.67

MPC

0.58

ClinPred

0.082

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.063

gMVP

0.43

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