6-7576338-G-A

Position:

chr6-7576338-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_004415.4(DSP):c.2675G>A(p.Arg892His) variant causes a missense change. The variant allele was found at a frequency of 0.0000118 in 1,613,942 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

DSP
NM_004415.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 5.17

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 -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.4018937).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
DSP	NM_004415.4 linkuse as main transcript	c.2675G>A	p.Arg892His	missense_variant	19/24	ENST00000379802.8	NP_004406.2
DSP	NM_001319034.2 linkuse as main transcript	c.2675G>A	p.Arg892His	missense_variant	19/24		NP_001305963.1
DSP	NM_001008844.3 linkuse as main transcript	c.2675G>A	p.Arg892His	missense_variant	19/24		NP_001008844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSP	ENST00000379802.8 linkuse as main transcript	c.2675G>A	p.Arg892His	missense_variant	19/24	1	NM_004415.4	ENSP00000369129	P2	P15924-1
DSP	ENST00000418664.2 linkuse as main transcript	c.2675G>A	p.Arg892His	missense_variant	19/24	1		ENSP00000396591	A2	P15924-2
DSP	ENST00000710359.1 linkuse as main transcript	c.2675G>A	p.Arg892His	missense_variant	19/24			ENSP00000518230	A2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251278

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135802

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

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:

0.0000528

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000116

AC:

AN:

1461804

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727202

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74306

show subpopulations

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Dec 27, 2022

Variant summary: DSP c.2675G>A (p.Arg892His) results in a non-conservative amino acid change located in the Spectrin/alpha-actinin repeat domain (IPR018159) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.2e-05 in 251278 control chromosomes. The observed variant frequency within Latino/Admixed American and Non-Finnish European control individuals in the gnomAD database is approximately 2.32-fold (5.8e-05) and 2.12-fold (5.3e-05) higher, respectively, than the estimated maximal expected allele frequency for a pathogenic variant in DSP causing a Cardiomyopathy phenotype (2.5e-05), suggesting that the variant is may be a benign polymorphism found primarily in populations of Latino/Admixed American and Non-Finnish European origin. However, the total number of occurrence is relatively small. The variant, c.2675G>A, has been reported in the literature in an individual diagnosed with Brugada Syndrome (Quenin_2017). However, this report does not provide unequivocal conclusions about association of the variant with Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014, and all laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Jan 10, 2023

This missense variant replaces arginine with histidine at codon 892 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 cardiovascular disorders in the literature. This variant has been identified in 8/251278 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jan 31, 2020

Has not been previously published as pathogenic or benign to our knowledge; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 566173; Landrum et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 19, 2024

The p.R892H variant (also known as c.2675G>A), located in coding exon 19 of the DSP gene, results from a G to A substitution at nucleotide position 2675. The arginine at codon 892 is replaced by histidine, an amino acid with highly similar properties. This alteration has been reported in a sudden death cohort (Quenin P et al. Circ Arrhythm Electrophysiol, 2017 Sep;10:). This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. -

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

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 01, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.047

BayesDel_noAF

Benign

-0.20

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.77

D;.

Eigen

Uncertain

0.65

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.96

D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.40

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

2.0

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-3.7

D;D

REVEL

Benign

0.16

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.011

D;T

Polyphen

1.0

D;.

Vest4

0.67

MutPred

0.39

Loss of MoRF binding (P = 0.0175);Loss of MoRF binding (P = 0.0175);

MVP

0.59

MPC

0.90

ClinPred

0.77

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.29

gMVP

0.39

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