rs730880085

Positions:

• chr6-7582703-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_004415.4(DSP):​c.5441G>A​(p.Ser1814Asn) variant causes a missense change. The variant allele was found at a frequency of 0.00000479 in 1,461,372 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: DSP NM_004415.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3 B:1
• Conservation: PhyloP100: 4.67

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 Likely_benign. Variant got -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.1593481).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSP	NM_004415.4	c.5441G>A	p.Ser1814Asn	missense_variant	24/24	ENST00000379802.8	NP_004406.2
DSP	NM_001319034.2	c.4112G>A	p.Ser1371Asn	missense_variant	24/24		NP_001305963.1
DSP	NM_001008844.3	c.3644G>A	p.Ser1215Asn	missense_variant	24/24		NP_001008844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSP	ENST00000379802.8	c.5441G>A	p.Ser1814Asn	missense_variant	24/24	1	NM_004415.4	ENSP00000369129.3
DSP	ENST00000418664.2	c.3644G>A	p.Ser1215Asn	missense_variant	24/24	1		ENSP00000396591.2
DSP	ENST00000710359.1	c.4112G>A	p.Ser1371Asn	missense_variant	24/24			ENSP00000518230.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250924 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135606

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461372 Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5 AN XY: 726980

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00000630

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3 Benign:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

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

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 25, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant  is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 180333). This variant has not been reported in the literature in individuals affected with DSP-related conditions. This variant is present in population databases (rs730880085, gnomAD 0.0009%). This sequence change replaces serine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 1814 of the DSP protein (p.Ser1814Asn). -

Cardiomyopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Mar 05, 2020

This missense variant replaces serine with asparagine at codon 1814 of the DSP protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with cardiovascular disorders in the literature. This variant has been identified in 1/250924 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. -

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 08, 2024

The p.S1814N variant (also known as c.5441G>A), located in coding exon 24 of the DSP gene, results from a G to A substitution at nucleotide position 5441. The serine at codon 1814 is replaced by asparagine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Primary familial hypertrophic cardiomyopathy Benign:1

Likely benign, no assertion criteria provided

clinical testing

Blueprint Genetics

May 13, 2014

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.33	T;.
Eigen	Benign	-0.019
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Benign	0.79	T;T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.16	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L;.
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-1.6	N;N
REVEL	Benign	0.081
Sift	Uncertain	0.024	D;T
Sift4G	Benign	0.35	T;T
Polyphen		0.15	B;.
Vest4		0.17
MutPred		0.11		Loss of phosphorylation at S1814 (P = 0.028);.;
MVP		0.61
MPC		0.27
ClinPred		0.57	D
GERP RS		4.3
Varity_R		0.18
gMVP		0.16

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: rs730880085; hg19: chr6-7582936;