6-7585530-A-C

Position:

• chr6-7585530-A-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_004415.4(DSP):​c.8268A>C​(p.Ile2756=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000456 in 1,614,242 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00032 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00047 (10 hom.)
• Consequence: DSP NM_004415.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11
• Conservation: PhyloP100: -1.36

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 -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BP6: Variant 6-7585530-A-C is Benign according to our data. Variant chr6-7585530-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 44962.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr6-7585530-A-C is described in Lovd as [Likely_benign]. Variant chr6-7585530-A-C is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=-1.36 with no splicing effect.
• BS1: Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.000471 (688/1461886) while in subpopulation SAS AF= 0.00694 (599/86258). AF 95% confidence interval is 0.00648. There are 10 homozygotes in gnomad4_exome. There are 465 alleles in male gnomad4_exome subpopulation. Median coverage is 37. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 10 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DSP	NM_004415.4	c.8268A>C	p.Ile2756=	synonymous_variant	24/24	ENST00000379802.8	NP_004406.2
DSP	NM_001319034.2	c.6939A>C	p.Ile2313=	synonymous_variant	24/24		NP_001305963.1
DSP	NM_001008844.3	c.6471A>C	p.Ile2157=	synonymous_variant	24/24		NP_001008844.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DSP	ENST00000379802.8	c.8268A>C	p.Ile2756=	synonymous_variant	24/24	1	NM_004415.4	ENSP00000369129	P2
DSP	ENST00000418664.2	c.6471A>C	p.Ile2157=	synonymous_variant	24/24	1		ENSP00000396591	A2
DSP	ENST00000710359.1	c.6939A>C	p.Ile2313=	synonymous_variant	24/24			ENSP00000518230	A2

Frequencies

GnomAD3 genomes AF: 0.000315 AC: 48 AN: 152238 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000962

Gnomad SAS AF: 0.00766

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000979 AC: 246 AN: 251338 Hom.: 4 AF XY: 0.00132 AC XY: 179 AN XY: 135882

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000652

Gnomad SAS exome AF: 0.00732

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000440

Gnomad OTH exome AF: 0.000490

GnomAD4 exome AF: 0.000471 AC: 688 AN: 1461886 Hom.: 10 Cov.: 37 AF XY: 0.000639 AC XY: 465 AN XY: 727244

Gnomad4 AFR exome AF: 0.000329

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000302

Gnomad4 SAS exome AF: 0.00694

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000153

Gnomad4 OTH exome AF: 0.000712

GnomAD4 genome AF: 0.000315 AC: 48 AN: 152356 Hom.: 0 Cov.: 32 AF XY: 0.000456 AC XY: 34 AN XY: 74504

Gnomad4 AFR AF: 0.000120

Gnomad4 AMR AF: 0.0000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000964

Gnomad4 SAS AF: 0.00767

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000427 Hom.: 0

Bravo AF: 0.000159

Asia WGS AF: 0.00346 AC: 12 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:4

Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 30, 2015	p.Ile2756Ile in exon 24 of DSP: This variant is not expected to have clinical si gnificance because it has been identified in 0.7% (112/16510) of South Asian chr omosomes including three homozygotes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs397516963). -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Apr 25, 2021	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 12, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Cardiomyopathy Benign:2

Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Oct 16, 2018	- -
Benign, criteria provided, single submitter	clinical testing	CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario	Jul 31, 2018	- -

not provided Benign:2

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2021	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

Arrhythmogenic cardiomyopathy with wooly hair and keratoderma Benign:1

Benign, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Dec 01, 2023

- -

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

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 29, 2024

- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 29, 2021

This alteration is classified as likely 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
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.095
DANN	Benign	0.54
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs397516963; hg19: chr6-7585763;