X-32348530-TAAA-TAAAA

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP6BS2_Supporting

The NM_004006.3(DMD):c.5326-3dupT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000562 in 1,174,873 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 6 hemizygotes in GnomAD. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000045 ( 0 hom., 2 hem., cov: 23)

Exomes 𝑓: 0.000057 ( 0 hom. 4 hem. )

Consequence

DMD
NM_004006.3 splice_region, intron

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 3.33

Publications

3 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 -2 ACMG points.

BP6

Variant X-32348530-T-TA is Benign according to our data. Variant chrX-32348530-T-TA is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 283956.

BS2

High AC in GnomAd4 at 5 XL,AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DMD	NM_004006.3 link	c.5326-3dupT		splice_region_variant, intron_variant	Intron 37 of 78	ENST00000357033.9	NP_003997.2	P11532

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DMD	ENST00000357033.9 link	c.5326-3_5326-2insT		splice_region_variant, intron_variant	Intron 37 of 78	1	NM_004006.3	ENSP00000354923.3		A0A075B6G3

Frequencies

GnomAD3 genomes

AF:

0.0000455

AC:

AN:

109983

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000194

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:

0.0000573

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000142

AC:

AN:

141030

AF XY:

0.0000234

show subpopulations

Gnomad AFR exome

AF:

0.000187

Gnomad AMR exome

AF:

0.000242

Gnomad ASJ exome

AF:

0.000163

Gnomad EAS exome

AF:

0.000185

Gnomad FIN exome

AF:

0.000240

Gnomad NFE exome

AF:

0.000112

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000573

AC:

AN:

1064890

Hom.:

Cov.:

AF XY:

0.0000117

AC XY:

AN XY:

342204

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000788

AC:

AN:

25391

American (AMR)

AF:

0.000181

AC:

AN:

33060

Ashkenazi Jewish (ASJ)

AF:

0.0000536

AC:

AN:

18647

East Asian (EAS)

AF:

0.0000343

AC:

AN:

29120

South Asian (SAS)

AF:

0.0000583

AC:

AN:

51450

European-Finnish (FIN)

AF:

0.000104

AC:

AN:

38529

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4018

European-Non Finnish (NFE)

AF:

0.0000512

AC:

AN:

820048

Other (OTH)

AF:

0.0000448

AC:

AN:

44627

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.304

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:

0.0000455

AC:

AN:

109983

Hom.:

Cov.:

AF XY:

0.0000611

AC XY:

AN XY:

32741

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30364

American (AMR)

AF:

0.000194

AC:

AN:

10296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2612

East Asian (EAS)

AF:

0.00

AC:

AN:

3546

South Asian (SAS)

AF:

0.00

AC:

AN:

2675

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5775

Middle Eastern (MID)

AF:

0.00

AC:

AN:

238

European-Non Finnish (NFE)

AF:

0.0000573

AC:

AN:

52322

Other (OTH)

AF:

0.00

AC:

AN:

1469

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome 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

Alfa

AF:

0.00113

Hom.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Oct 06, 2015

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

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

Benign:1

Aug 13, 2020

Natera, Inc.

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Duchenne muscular dystrophy

Benign:1

Dec 27, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Benign:1

Oct 01, 2024

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

PhyloP100

3.3

Mutation Taster

=95/5

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over