rs770489625

Positions:

• chr6-7579720-T-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_Moderate BP6

The NM_004415.4(DSP):​c.3530T>A​(p.Leu1177Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000105 in 1,613,576 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). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L1177I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: DSP NM_004415.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 3.19

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 -3 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.17420113).
• BP6: Variant 6-7579720-T-A is Benign according to our data. Variant chr6-7579720-T-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 405226.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DSP	NM_004415.4	c.3530T>A	p.Leu1177Gln	missense_variant	23/24	ENST00000379802.8
DSP	NM_001319034.2	c.3530T>A	p.Leu1177Gln	missense_variant	23/24
DSP	NM_001008844.3	c.3530T>A	p.Leu1177Gln	missense_variant	23/24

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DSP	ENST00000379802.8	c.3530T>A	p.Leu1177Gln	missense_variant	23/24	1	NM_004415.4	P2
DSP	ENST00000418664.2	c.3530T>A	p.Leu1177Gln	missense_variant	23/24	1		A2
DSP	ENST00000710359.1	c.3530T>A	p.Leu1177Gln	missense_variant	23/24			A2

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152054 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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: 0.0000240 AC: 6 AN: 250344 Hom.: 0 AF XY: 0.0000148 AC XY: 2 AN XY: 135366

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: 0.0000463

Gnomad NFE exome AF: 0.0000443

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000109 AC: 16 AN: 1461522 Hom.: 0 Cov.: 32 AF XY: 0.00000825 AC XY: 6 AN XY: 727056

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: 0.0000126

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152054 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74250

Gnomad4 AFR AF: 0.00

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

Bravo AF: 0.0000113

ExAC AF: 0.0000412 AC: 5

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Arrhythmogenic cardiomyopathy with wooly hair and keratoderma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Aug 15, 2023

This missense variant replaces leucine with glutamine at codon 1177 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 6/250344 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. -

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

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Sep 10, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	0.060
CADD	Benign	22
DANN	Benign	0.96
DEOGEN2	Benign	0.14	T;.
Eigen	Benign	-0.064
Eigen_PC	Benign	-0.0014
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.92	D;T
M_CAP	Uncertain	0.13	D
MetaRNN	Benign	0.17	T;T
MetaSVM	Uncertain	0.20	D
MutationAssessor	Benign	0.26	N;N
MutationTaster	Benign	0.98	D;D
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	0.74	N;N
REVEL	Uncertain	0.46
Sift	Benign	0.34	T;T
Sift4G	Benign	0.50	T;T
Polyphen		1.0	D;.
Vest4		0.73
MutPred		0.14		Loss of stability (P = 0.0769);Loss of stability (P = 0.0769);
MVP		0.85
MPC		0.84
ClinPred		0.13	T
GERP RS		5.0
Varity_R		0.16
gMVP		0.34

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: rs770489625; hg19: chr6-7579953;