rs34337334

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 4P and 8B. PM1PM2BP4_StrongBS1

The NM_001927.4(DES):c.934G>A(p.Asp312Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000105 in 1,613,694 control chromosomes in the GnomAD database, including 1 homozygotes. 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. D312A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00051 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000062 ( 1 hom. )

Consequence

DES
NM_001927.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:14B:2O:1

Conservation

PhyloP100: 10.0

Variant links:

Genes affected

DES (HGNC:2770): (desmin) This gene encodes a muscle-specific class III intermediate filament. Homopolymers of this protein form a stable intracytoplasmic filamentous network connecting myofibrils to each other and to the plasma membrane. Mutations in this gene are associated with desmin-related myopathy, a familial cardiac and skeletal myopathy (CSM), and with distal myopathies. [provided by RefSeq, Jul 2008]

DES links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM1

In a region_of_interest Interaction with NEB (size 147) in uniprot entity DESM_HUMAN there are 50 pathogenic changes around while only 2 benign (96%) in NM_001927.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03330955).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000513 (78/152082) while in subpopulation AFR AF= 0.00166 (69/41464). AF 95% confidence interval is 0.00135. There are 0 homozygotes in gnomad4. There are 37 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DES	NM_001927.4 link	c.934G>A	p.Asp312Asn	missense_variant	Exon 5 of 9	ENST00000373960.4	NP_001918.3	P17661Q53SB5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
DES	ENST00000373960.4 link	c.934G>A	p.Asp312Asn	missense_variant	Exon 5 of 9	1	NM_001927.4	ENSP00000363071.3	P17661
DES	ENST00000477226.6 link	n.408G>A		non_coding_transcript_exon_variant	Exon 4 of 8	4
DES	ENST00000492726.1 link	n.329G>A		non_coding_transcript_exon_variant	Exon 4 of 6	4
DES	ENST00000683013.1 link	n.322G>A		non_coding_transcript_exon_variant	Exon 3 of 7

Frequencies

GnomAD3 genomes

AF:

0.000513

AC:

AN:

151964

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00167

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000328

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:

0.0000294

Gnomad OTH

AF:

0.000960

GnomAD3 exomes

AF:

0.000151

AC:

AN:

251002

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135682

show subpopulations

Gnomad AFR exome

AF:

0.00203

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000623

AC:

AN:

1461612

Hom.:

Cov.:

AF XY:

0.0000536

AC XY:

AN XY:

727126

show subpopulations

Gnomad4 AFR exome

AF:

0.00182

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000513

AC:

AN:

152082

Hom.:

Cov.:

AF XY:

0.000498

AC XY:

AN XY:

74342

show subpopulations

Gnomad4 AFR

AF:

0.00166

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000950

Alfa

AF:

0.0258

Hom.:

2306

Bravo

AF:

0.000627

ESP6500AA

AF:

0.00159

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000181

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:14Benign:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:7Other:1

Jul 18, 2019

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 26, 2017

Athena Diagnostics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Epithelial Biology; Institute of Medical Biology, Singapore

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Mar 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

DES: PP3 -

Mar 01, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The DES c.934G>A; p.Asp312Asn variant (rs34337334) is reported in the literature in multiple individuals affected with dilated cardiomyopathy, as well as one individual with symptoms of a neuromuscular disorder, although it was not demonstrated to be disease-causing in these individuals (Gonzalez-Quereda 2020, McGurk 2023, Taylor 2007). This variant is found in the African population with an allele frequency of 0.19% (48/24,928 alleles) in the Genome Aggregation Database (v2.1.1). Computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.521). Functional studies have noted altered subcellular localization compared to wildtype DES protein when expressed in cultured cells, but the functional significance of this assay is unclear (Taylor 2007). Due to limited and conflicting information, the clinical significance of the p.Asp312Asn variant is uncertain at this time. References: Gonzalez-Quereda L et al. Targeted Next-Generation Sequencing in a Large Cohort of Genetically Undiagnosed Patients with Neuromuscular Disorders in Spain. Genes (Basel). 2020 May 11;11(5):539. PMID: 32403337. McGurk KA et al. The penetrance of rare variants in cardiomyopathy-associated genes: A cross-sectional approach to estimating penetrance for secondary findings. Am J Hum Genet. 2023 Sep 7;110(9):1482-1495. PMID: 37652022. Taylor MR et al. Prevalence of desmin mutations in dilated cardiomyopathy. Circulation. 2007 Mar 13;115(10):1244-51. PMID: 17325244. -

Feb 27, 2018

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 30, 2022

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Asp312Asn variant in DES has been reported in 1 Black individual with DCM and in vitro studies suggest that this variant may impact protein function, though these assays may not accurately represent biological function (Taylor 2007). In addition, this variant has been identified by our laboratory in 1 Black individual with infant-onset complex cardiomyopathy a well as 2 members of a Hispanic family (both with DCM). However, this variant is present in 0.2% (7/4406) of African American chromosomes by the NHLBI Exome Sequencing Project (http://evs.gs.washington.edu/EVS/; dbSNP rs34337334). Computational prediction tools and conservation analysis do not provide strong support for or against an impact to the protein. In summary, the clinical significance of the Asp312Asn variant is uncertain. ACMG/AMP criteria applied: BA1. -

Oct 20, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Expression studies suggest this variant results in impairment of the desmin filament network (Taylor et al., 2007); however, it is unclear how these studies may translate to a pathogenic role in vivo; This variant is associated with the following publications: (PMID: 22337857, 27896284, 24503780, 23299917, 29988065, 32403337, 34426522, 17325244, 34045587) -

Desmin-related myofibrillar myopathy

Uncertain:3

May 28, 2019

Mendelics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 312 of the DES protein (p.Asp312Asn). This variant is present in population databases (rs34337334, gnomAD 0.2%). This missense change has been observed in individual(s) with dilated cardiomyopathy (PMID: 17325244, 24503780, 37652022). ClinVar contains an entry for this variant (Variation ID: 44274). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on DES protein function. Experimental studies have shown that this missense change affects DES function (PMID: 17325244). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Dilated cardiomyopathy 1I

Uncertain:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Cardiomyopathy

Uncertain:1

Nov 23, 2015

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Desmin-related myofibrillar myopathy;C1858154:Dilated cardiomyopathy 1I;C1867005:Neurogenic scapuloperoneal syndrome, Kaeser type

Uncertain:1

May 21, 2021

New York Genome Center

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Primary dilated cardiomyopathy

Uncertain:1

Genetics and Genomics Program, Sidra Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: research

- -

Neurogenic scapuloperoneal syndrome, Kaeser type

Benign:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Cardiovascular phenotype

Benign:1

Feb 22, 2022

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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

AlphaMissense

Uncertain

0.34

CardioboostCm

Uncertain

0.51

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.28

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.75

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.033

MetaSVM

Uncertain

0.28

MutationAssessor

Uncertain

2.3

PrimateAI

Pathogenic

0.84

PROVEAN

Uncertain

-3.2

REVEL

Uncertain

0.52

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0030

Polyphen

1.0

Vest4

0.48

MVP

0.82

MPC

1.4

ClinPred

0.21

GERP RS

4.9

Varity_R

0.50

gMVP

0.60

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