chr6-7584359-G-A

Position:

• chr6-7584359-G-A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PM5 PP3_Moderate PP5_Very_Strong

The ENST00000379802.8(DSP):​c.7097G>A​(p.Arg2366His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,864 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R2366C) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: DSP ENST00000379802.8 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 8.15

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 Pathogenic. Variant got 14 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr6-7584358-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 16841.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Pathogenic=1, Uncertain_significance=1}.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.928
• PP5: Variant 6-7584359-G-A is Pathogenic according to our data. Variant chr6-7584359-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 29672.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSP	NM_004415.4	c.7097G>A	p.Arg2366His	missense_variant	24/24	ENST00000379802.8	NP_004406.2
DSP	NM_001319034.2	c.5768G>A	p.Arg1923His	missense_variant	24/24		NP_001305963.1
DSP	NM_001008844.3	c.5300G>A	p.Arg1767His	missense_variant	24/24		NP_001008844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSP	ENST00000379802.8	c.7097G>A	p.Arg2366His	missense_variant	24/24	1	NM_004415.4	ENSP00000369129	P2
DSP	ENST00000418664.2	c.5300G>A	p.Arg1767His	missense_variant	24/24	1		ENSP00000396591	A2
DSP	ENST00000710359.1	c.5768G>A	p.Arg1923His	missense_variant	24/24			ENSP00000518230	A2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251390 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135868

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461864 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727228

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Arrhythmogenic cardiomyopathy with wooly hair and keratoderma Pathogenic:5

Likely pathogenic, criteria provided, single submitter	not provided	Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin	-	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Human Genome Sequencing Center Clinical Lab, Baylor College of Medicine	Oct 04, 2023	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jul 01, 2011	- -
Likely pathogenic, criteria provided, single submitter	research	Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center	Mar 17, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Human Genetics, University of Leipzig Medical Center	Jan 15, 2024	Criteria applied: PP1_STR,PM3,PM5,PM2_SUP,PP3,PP4 -

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

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 11, 2023

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 2366 of the DSP protein (p.Arg2366His). This variant is present in population databases (rs387906618, gnomAD 0.003%). This missense change has been observed in individual(s) with autosomal recessive skin fragility–woolly hair syndrome (PMID: 20738328). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 29672). 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 disruptive. This variant disrupts the p.Arg2366 amino acid residue in DSP. Other variant(s) that disrupt this residue have been observed in individuals with DSP-related conditions (PMID: 11841538), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.84	D;.
Eigen	Pathogenic	0.98
Eigen_PC	Pathogenic	0.93
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.93	D;D
MetaSVM	Uncertain	0.57	D
MutationAssessor	Pathogenic	3.3	M;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.81	D
PROVEAN	Uncertain	-3.7	D;D
REVEL	Pathogenic	0.80
Sift	Benign	0.11	T;T
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.96
MutPred		0.79		Gain of methylation at K2361 (P = 0.039);.;
MVP		0.83
MPC		0.92
ClinPred		0.95	D
GERP RS		5.7
Varity_R		0.55
gMVP		0.82

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: rs387906618; hg19: chr6-7584592;