rs747055774

Positions:

chrX-31929612-T-G

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_004006.3(DMD):c.6896A>C(p.Asn2299Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000157 in 1,209,096 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 4 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in UniProt.

Frequency

Genomes: 𝑓 0.0000090 ( 0 hom., 0 hem., cov: 22)

Exomes 𝑓: 0.000016 ( 0 hom. 4 hem. )

Consequence

DMD
NM_004006.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 3.19

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.2236872).

BP6

Variant X-31929612-T-G is Benign according to our data. Variant chrX-31929612-T-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 287917.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=2}. Variant chrX-31929612-T-G is described in Lovd as [Benign].

BS2

High Hemizygotes in GnomAdExome4 at 4 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DMD	NM_004006.3 link	c.6896A>C	p.Asn2299Thr	missense_variant	47/79	ENST00000357033.9	NP_003997.2	P11532

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DMD	ENST00000357033.9 link	c.6896A>C	p.Asn2299Thr	missense_variant	47/79	1	NM_004006.3	ENSP00000354923.3		A0A075B6G3

Frequencies

GnomAD3 genomes

AF:

0.00000899

AC:

AN:

111280

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33480

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000966

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

GnomAD3 exomes

AF:

0.0000929

AC:

AN:

183062

Hom.:

AF XY:

0.0000444

AC XY:

AN XY:

67554

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000620

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.0000164

AC:

AN:

1097816

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

363202

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000483

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000119

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000899

AC:

AN:

111280

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33480

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000966

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000378

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 19, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 22, 2020	- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 18, 2020

The p.N2299T variant (also known as c.6896A>C), located in coding exon 47 of the DMD gene, results from an A to C substitution at nucleotide position 6896. The asparagine at codon 2299 is replaced by threonine, an amino acid with similar properties. This variant has been detected in a control individual and in a male with dilated cardiomyopathy who also had other variants in the DMD gene (Feng J et al. Mol. Genet. Metab.;77:119-26). This amino acid position is well conserved in available vertebrate species; however, threonine is the reference amino acid in other 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 alteration remains unclear. -

DMD-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 24, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Duchenne muscular dystrophy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 28, 2025

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.44

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.55

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.34

.;T;.;.

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.57

T;.;T;T

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.22

T;T;T;T

MetaSVM

Benign

-0.85

PrimateAI

Benign

0.46

PROVEAN

Uncertain

-3.2

.;D;.;D

REVEL

Benign

0.17

Sift

Uncertain

0.014

.;D;.;D

Sift4G

Uncertain

0.048

D;D;D;D

Polyphen

0.75

.;P;.;.

Vest4

0.37

MutPred

0.55

.;.;.;Loss of ubiquitination at K2294 (P = 0.077);

MVP

0.70

MPC

0.055

ClinPred

0.20

GERP RS

4.1

gMVP

0.32

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