rs145796901

Variant names:

• chr6-7580763-A-G
• rs145796901
• NM_004415.4:c.4573A>G

Variant summary

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

The NM_004415.4(DSP):​c.4573A>G​(p.Ile1525Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000743 in 1,614,006 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: DSP NM_004415.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 2.37

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=0.08481735).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DSP	NM_004415.4	c.4573A>G	p.Ile1525Val	missense_variant	Exon 23 of 24	ENST00000379802.8	NP_004406.2
DSP	NM_001319034.2	c.4050+523A>G		intron_variant	Intron 23 of 23		NP_001305963.1
DSP	NM_001008844.3	c.3582+991A>G		intron_variant	Intron 23 of 23		NP_001008844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DSP	ENST00000379802.8	c.4573A>G	p.Ile1525Val	missense_variant	Exon 23 of 24	1	NM_004415.4	ENSP00000369129.3
DSP	ENST00000418664.2	c.3582+991A>G		intron_variant	Intron 23 of 23	1		ENSP00000396591.2
DSP	ENST00000710359.1	c.4050+523A>G		intron_variant	Intron 23 of 23			ENSP00000518230.1

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152198 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

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: 0.0000441

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000160 AC: 4 AN: 250358 Hom.: 0 AF XY: 0.0000148 AC XY: 2 AN XY: 135522

Gnomad AFR exome AF: 0.0000621

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: 0.0000266

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461808 Hom.: 0 Cov.: 32 AF XY: 0.00000688 AC XY: 5 AN XY: 727188

Gnomad4 AFR exome AF: 0.0000299

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: 0.00000629

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152198 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74366

Gnomad4 AFR AF: 0.0000241

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: 0.0000441

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000151

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not specified Uncertain:1

Jun 06, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The Ile1525Val vari ant in DSP has not been reported in the literature nor previously identified by our laboratory. This variant has been identified in 1/7020 European American chr omosomes from a broad population by the NHLBI Exome Sequencing Project (http://e vs.gs.washington.edu/EVS/; dbSNP rs145796901), though this could represent a pre symptomatic individual in the general population. Computational analyses (bioche mical amino acid properties, conservation, AlignGVGD, PolyPhen2, and SIFT) sugge st that this variant may not impact the protein, though this information is not predictive enough to rule out pathogenicity. Additional information is needed to fully assess the clinical significance of this variant. -

Cardiomyopathy Uncertain:1

Jan 17, 2024

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces isoleucine with valine at codon 1525 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). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with DSP-related disorders in the literature. This variant has been identified in 4/250358 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

Apr 28, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.I1525V variant (also known as c.4573A>G), located in coding exon 23 of the DSP gene, results from an A to G substitution at nucleotide position 4573. The isoleucine at codon 1525 is replaced by valine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

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

Sep 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	11
DANN	Benign	0.96
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.61
Eigen_PC	Benign	-0.58
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.72	T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.085	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-0.35	N
REVEL	Benign	0.12
Sift	Benign	0.34	T
Sift4G	Benign	0.12	T
Polyphen		0.0	B
Vest4		0.098
MVP		0.53
MPC		0.18
ClinPred		0.097	T
GERP RS		3.4
Varity_R		0.022
gMVP		0.071

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: rs145796901; hg19: chr6-7580996;