Genetic Variant DMD:p.Lys722Lys (chrX-32545161-T-C) – ACMG Classification: Benign (-10 pts)

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_StrongBP6BP7BS2

The NM_004006.3(DMD):c.2166A>G(p.Lys722Lys) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000273 in 1,208,236 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 8 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 3/3 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 0.00018 ( 0 hom., 5 hem., cov: 24)

Exomes 𝑓: 0.000012 ( 0 hom. 3 hem. )

Consequence

DMD
NM_004006.3 splice_region, synonymous

Scores

Splicing: ADA: 0.0002193

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: 1.57

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: Orphanet, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
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: Benign. The variant received -10 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant X-32545161-T-C is Benign according to our data. Variant chrX-32545161-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 390872.

BP7

Synonymous conserved (PhyloP=1.57 with no splicing effect.

BS2

High AC in GnomAd4 at 20 XL,AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004006.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
DMD	NM_004006.3	MANE Select	c.2166A>G	p.Lys722Lys	splice_region synonymous	Exon 17 of 79	NP_003997.2	P11532-1
DMD	NM_004009.3		c.2154A>G	p.Lys718Lys	splice_region synonymous	Exon 17 of 79	NP_004000.1	P11532
DMD	NM_000109.4		c.2142A>G	p.Lys714Lys	splice_region synonymous	Exon 17 of 79	NP_000100.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
DMD	ENST00000357033.9	TSL:1 MANE Select	c.2166A>G	p.Lys722Lys	splice_region synonymous	Exon 17 of 79	ENSP00000354923.3	P11532-1
DMD	ENST00000288447.9	TSL:1	c.2142A>G	p.Lys714Lys	splice_region synonymous	Exon 17 of 18	ENSP00000288447.4	Q4G0X0
DMD	ENST00000378677.6	TSL:5	c.2154A>G	p.Lys718Lys	splice_region synonymous	Exon 17 of 79	ENSP00000367948.2	P11532-11

Frequencies

GnomAD3 genomes

AF:

0.000178

AC:

AN:

112098

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000649

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000384

AC:

AN:

182121

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.000533

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000119

AC:

AN:

1096138

Hom.:

Cov.:

AF XY:

0.00000829

AC XY:

AN XY:

361794

show subpopulations

African (AFR)

AF:

0.000418

AC:

AN:

26347

American (AMR)

AF:

0.00

AC:

AN:

35164

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19357

East Asian (EAS)

AF:

0.00

AC:

AN:

30171

South Asian (SAS)

AF:

0.00

AC:

AN:

54084

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40485

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4064

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

840472

Other (OTH)

AF:

0.0000435

AC:

AN:

45994

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

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:

0.000178

AC:

AN:

112098

Hom.:

Cov.:

AF XY:

0.000146

AC XY:

AN XY:

34284

show subpopulations

African (AFR)

AF:

0.000649

AC:

AN:

30815

American (AMR)

AF:

0.00

AC:

AN:

10547

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2650

East Asian (EAS)

AF:

0.00

AC:

AN:

3555

South Asian (SAS)

AF:

0.00

AC:

AN:

2719

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6164

Middle Eastern (MID)

AF:

0.00

AC:

AN:

238

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

53213

Other (OTH)

AF:

0.00

AC:

AN:

1514

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.00

Hom.:

Bravo

AF:

0.000147

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Cardiovascular phenotype (1)

Duchenne muscular dystrophy (1)

Duchenne muscular dystrophy;C0878544:Cardiomyopathy;C0917713:Becker muscular dystrophy;na:Dystrophin deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

(source)

DANN

Benign

0.62

PhyloP100

1.6

Mutation Taster

=94/6

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00022

dbscSNV1_RF

Benign

0.0060

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over