X-32501804-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 2P and 11B. PM2BP4_ModerateBP6_Very_StrongBP7

The NM_004006.3(DMD):c.2331G>A(p.Leu777Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000183 in 1,095,761 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. L777L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 1 hem., cov: 23)

Exomes 𝑓: 0.0000018 ( 0 hom. 0 hem. )

Failed GnomAD Quality Control

Consequence

DMD
NM_004006.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 2.01

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:

ENSG00000297605 (HGNC:):

ENSG00000297605 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.44).

BP6

Variant X-32501804-C-T is Benign according to our data. Variant chrX-32501804-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1105645.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=2.01 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DMD	NM_004006.3 link	c.2331G>A	p.Leu777Leu	synonymous_variant	Exon 19 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.2331G>A	p.Leu777Leu	synonymous_variant	Exon 19 of 79	1	NM_004006.3	ENSP00000354923.3		A0A075B6G3

Frequencies

GnomAD3 genomes

AF:

0.00000894

AC:

AN:

111856

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000183

AC:

AN:

1095761

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

361271

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26393

American (AMR)

AF:

0.00

AC:

AN:

35114

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19339

East Asian (EAS)

AF:

0.00

AC:

AN:

30181

South Asian (SAS)

AF:

0.00

AC:

AN:

53464

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40436

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4134

European-Non Finnish (NFE)

AF:

0.00000238

AC:

AN:

840698

Other (OTH)

AF:

0.00

AC:

AN:

46002

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000894

AC:

AN:

111856

Hom.:

Cov.:

AF XY:

0.0000294

AC XY:

AN XY:

34012

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30823

American (AMR)

AF:

0.00

AC:

AN:

10434

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2652

East Asian (EAS)

AF:

0.00

AC:

AN:

3575

South Asian (SAS)

AF:

0.00

AC:

AN:

2706

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5993

Middle Eastern (MID)

AF:

0.00

AC:

AN:

236

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53236

Other (OTH)

AF:

0.00

AC:

AN:

1514

Age Distribution

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:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Duchenne muscular dystrophy

Benign:1

Sep 21, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Benign:1

Mar 26, 2023

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

BayesDel_noAF

Benign

-0.44

CADD

Benign

8.2

(source)

DANN

Benign

0.77

PhyloP100

2.0

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over