X-32342158-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_004006.3(DMD):c.5864G>A(p.Arg1955His) variant causes a missense change. The variant allele was found at a frequency of 0.0000182 in 1,208,327 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 6 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1955C) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 22)

Exomes 𝑓: 0.000019 ( 0 hom. 6 hem. )

Consequence

DMD
NM_004006.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 6.85

Publications

0 publications found

Variant links:

Genes affected

DMD (HGNC:2928): (dystrophin) This gene spans a genomic range of greater than 2 Mb and encodes a large protein containing an N-terminal actin-binding domain and multiple spectrin repeats. The encoded protein forms a component of the dystrophin-glycoprotein complex (DGC), which bridges the inner cytoskeleton and the extracellular matrix. Deletions, duplications, and point mutations at this gene locus may cause Duchenne muscular dystrophy (DMD), Becker muscular dystrophy (BMD), or cardiomyopathy. Alternative promoter usage and alternative splicing result in numerous distinct transcript variants and protein isoforms for this gene. [provided by RefSeq, Dec 2016]

DMD Gene-Disease associations (from GenCC):

Becker muscular dystrophy
Inheritance: XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet
dilated cardiomyopathy 3B
Inheritance: XL Classification: DEFINITIVE Submitted by: Ambry Genetics
Duchenne and Becker muscular dystrophy
Inheritance: XL Classification: DEFINITIVE Submitted by: Myriad Women’s Health
Duchenne muscular dystrophy
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Orphanet
progressive muscular dystrophy
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
non-syndromic X-linked intellectual disability
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
symptomatic form of muscular dystrophy of Duchenne and Becker in female carriers
Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

DMD links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BS2

High AC in GnomAdExome4 at 21 XL,AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DMD	NM_004006.3 link	c.5864G>A	p.Arg1955His	missense_variant	Exon 41 of 79	ENST00000357033.9	NP_003997.2	P11532

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DMD	ENST00000357033.9 link	c.5864G>A	p.Arg1955His	missense_variant	Exon 41 of 79	1	NM_004006.3	ENSP00000354923.3		A0A075B6G3

Frequencies

GnomAD3 genomes

AF:

0.00000895

AC:

AN:

111764

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000281

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000220

AC:

AN:

181902

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000367

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000727

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000247

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000192

AC:

AN:

1096511

Hom.:

Cov.:

AF XY:

0.0000166

AC XY:

AN XY:

362067

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26383

American (AMR)

AF:

0.0000569

AC:

AN:

35137

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19371

East Asian (EAS)

AF:

0.0000332

AC:

AN:

30122

South Asian (SAS)

AF:

0.0000185

AC:

AN:

54023

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40485

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4130

European-Non Finnish (NFE)

AF:

0.0000202

AC:

AN:

840839

Other (OTH)

AF:

0.00

AC:

AN:

46021

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000894

AC:

AN:

111816

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34030

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30791

American (AMR)

AF:

0.00

AC:

AN:

10491

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2647

East Asian (EAS)

AF:

0.000282

AC:

AN:

3550

South Asian (SAS)

AF:

0.00

AC:

AN:

2701

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6044

Middle Eastern (MID)

AF:

0.00

AC:

AN:

219

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53166

Other (OTH)

AF:

0.00

AC:

AN:

1528

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 03, 2025

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

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: DMD c.5864G>A (p.Arg1955His) results in a non-conservative amino acid change in 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 2.2e-05 in 181902 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.5864G>A has been reported in the literature in at-least one individual affected with Myopathy and/or hyperCKemia (example: Invernizzi_2023). These report(s) do not provide unequivocal conclusions about association of the variant with Dystrophinopathies. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 37510298). ClinVar contains an entry for this variant (Variation ID: 518775). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Duchenne muscular dystrophy;C0878544:Cardiomyopathy;C0917713:Becker muscular dystrophy;na:Dystrophin deficiency

Uncertain:1

Jun 06, 2018

Natera, Inc.

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

not provided

Uncertain:1

Dec 07, 2017

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Uncertain:1

Jan 14, 2016

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.R1955H variant (also known as c.5864G>A), located in coding exon 41 of the DMD gene, results from a G to A substitution at nucleotide position 5864. The arginine at codon 1955 is replaced by histidine, an amino acid with highly similar properties. This variant was previously reported in the SNPDatabase as rs200455300. Based on data from the 1000 Genomes Project, the A allele has an overall frequency of approximately 0% (0/503) total male alleles studied. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this variant remains unclear. -

Duchenne muscular dystrophy

Uncertain:1

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1955 of the DMD protein (p.Arg1955His). This variant is present in population databases (rs200455300, gnomAD 0.008%). This missense change has been observed in individual(s) with DMD-related conditions (PMID: 37510298). ClinVar contains an entry for this variant (Variation ID: 518775). 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) indicates that this missense variant is not expected to disrupt DMD protein function with a negative predictive value of 95%. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Benign

-0.097

BayesDel_noAF

Benign

-0.19

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.26

.;T;.;.

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.92

D;.;D;D

M_CAP

Pathogenic

0.82

MetaRNN

Uncertain

0.43

T;T;T;T

MetaSVM

Benign

-0.62

PhyloP100

6.9

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-1.0

.;N;.;N

REVEL

Benign

0.27

Sift

Uncertain

0.0050

.;D;.;D

Sift4G

Benign

0.10

T;T;T;T

Polyphen

1.0

.;D;.;.

Vest4

0.50

MVP

0.77

MPC

0.071

ClinPred

0.48

GERP RS

5.8

gMVP

0.52

Mutation Taster

=52/48

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over