rs28763966

chr6-7580768-C-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_004415.4(DSP):c.4578C>A(p.Asn1526Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00824 in 1,614,046 control chromosomes in the GnomAD database, including 962 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N1526S) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.044 (496 hom., cov: 32)
  • Exomes 𝑓: 0.0046 (466 hom.)
• Consequence: DSP NM_004415.4 missense
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:13
• Conservation: PhyloP100: 1.28

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0015699267).
• BP6: Variant 6-7580768-C-A is Benign according to our data. Variant chr6-7580768-C-A is described in ClinVar as [Benign]. Clinvar id is 44919.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-7580768-C-A is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.149 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DSP	NM_004415.4	c.4578C>A	p.Asn1526Lys	missense_variant	23/24	ENST00000379802.8
DSP	NM_001008844.3	c.3582+996C>A		intron_variant
DSP	NM_001319034.2	c.4050+528C>A		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSP	ENST00000379802.8	c.4578C>A	p.Asn1526Lys	missense_variant	23/24	1	NM_004415.4	P2
DSP	ENST00000418664.2	c.3582+996C>A		intron_variant		1		A2
DSP	ENST00000710359.1	c.4050+528C>A		intron_variant				A2

Frequencies

GnomAD3 genomes AF: 0.0435 AC: 6621 AN: 152116 Hom.: 497 Cov.: 32

Gnomad AFR AF: 0.152

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0155

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.000470

Gnomad OTH AF: 0.0268

GnomAD3 exomes AF: 0.0110 AC: 2754 AN: 250374 Hom.: 174 AF XY: 0.00787 AC XY: 1066 AN XY: 135526

Gnomad AFR exome AF: 0.152

Gnomad AMR exome AF: 0.00596

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000262

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000522

Gnomad OTH exome AF: 0.00507

GnomAD4 exome AF: 0.00456 AC: 6666 AN: 1461812 Hom.: 466 Cov.: 32 AF XY: 0.00394 AC XY: 2865 AN XY: 727198

Gnomad4 AFR exome AF: 0.162

Gnomad4 AMR exome AF: 0.00666

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000290

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.000294

Gnomad4 OTH exome AF: 0.00904

GnomAD4 genome AF: 0.0436 AC: 6631 AN: 152234 Hom.: 496 Cov.: 32 AF XY: 0.0411 AC XY: 3058 AN XY: 74440

Gnomad4 AFR AF: 0.152

Gnomad4 AMR AF: 0.0156

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000470

Gnomad4 OTH AF: 0.0265

Alfa AF: 0.00787 Hom.: 158

Bravo AF: 0.0492

ESP6500AA AF: 0.151 AC: 665

ESP6500EA AF: 0.000698 AC: 6

ExAC AF: 0.0136 AC: 1650

Asia WGS AF: 0.00693 AC: 24 AN: 3478

EpiCase AF: 0.000818

EpiControl AF: 0.000771

ClinVar

Significance: Benign

Submissions summary: Benign:13

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:6

Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Feb 09, 2012	Asn1526Lys in exon 23 of DSP: This variant is classified as benign based on its high frequency in the general population (dbSNP rs28763966; NHLBI Exome Sequenci ng Project, http://evs.gs.washington.edu/EVS). A=565/C=3173 -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	research	Biesecker Lab/Clinical Genomics Section, National Institutes of Health	Jun 24, 2013	- -
Benign, criteria provided, single submitter	clinical testing	Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute	Apr 23, 2020	- -

Arrhythmogenic right ventricular dysplasia 8;C1854063:Arrhythmogenic cardiomyopathy with wooly hair and keratoderma Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Feb 01, 2024

- -

Cardiomyopathy Benign:1

Benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Mar 15, 2018

- -

Lethal acantholytic epidermolysis bullosa Benign:1

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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Woolly hair-skin fragility syndrome Benign:1

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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Arrhythmogenic right ventricular dysplasia 8 Benign:1

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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Mar 03, 2015

- -

Cardiovascular phenotype Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 26, 2015

This alteration is classified as 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	0.24
BayesDel_addAF	Benign	-0.65	T
BayesDel_noAF	Benign	-0.57
Cadd	Benign	16
Dann	Benign	0.64
DEOGEN2	Benign	0.14	T
Eigen	Benign	-0.72
Eigen_PC	Benign	-0.64
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.85	D
MetaRNN	Benign	0.0016	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	0.83	P;P
PrimateAI	Benign	0.29	T
PROVEAN	Benign	0.070	N
REVEL	Benign	0.12
Sift	Benign	0.66	T
Sift4G	Benign	0.74	T
Polyphen		0.030	B
Vest4		0.066
MutPred		0.15		Gain of ubiquitination at N1526 (P = 0.0289);
MPC		0.25
ClinPred		0.0025	T
GERP RS		3.0
Varity_R		0.044
gMVP		0.087

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

Other links and lift over

dbSNP: rs28763966; hg19: chr6-7581001;