rs201799335

Positions:

chrX-32697892-G-A

Variant summary

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

The NM_004006.3(DMD):c.938C>T(p.Thr313Ile) variant causes a missense change. The variant allele was found at a frequency of 0.0000132 in 1,208,428 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. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000063 ( 0 hom., 1 hem., cov: 22)

Exomes 𝑓: 0.0000082 ( 0 hom. 3 hem. )

Consequence

DMD
NM_004006.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 3.99

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=0.1075677).

BP6

Variant X-32697892-G-A is Benign according to our data. Variant chrX-32697892-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 455946.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=1}.

BS2

High Hemizygotes in GnomAdExome4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DMD	NM_004006.3 linkuse as main transcript	c.938C>T	p.Thr313Ile	missense_variant	9/79	ENST00000357033.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DMD	ENST00000357033.9 linkuse as main transcript	c.938C>T	p.Thr313Ile	missense_variant	9/79	1	NM_004006.3	P4

Frequencies

GnomAD3 genomes

AF:

0.0000630

AC:

AN:

111048

Hom.:

Cov.:

AF XY:

0.0000301

AC XY:

AN XY:

33224

show subpopulations

Gnomad AFR

AF:

0.000229

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

GnomAD3 exomes

AF:

0.0000220

AC:

AN:

181684

Hom.:

AF XY:

0.0000301

AC XY:

AN XY:

66442

show subpopulations

Gnomad AFR exome

AF:

0.000306

Gnomad AMR exome

AF:

0.00

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:

0.00000820

AC:

AN:

1097380

Hom.:

Cov.:

AF XY:

0.00000827

AC XY:

AN XY:

362962

show subpopulations

Gnomad4 AFR exome

AF:

0.000303

Gnomad4 AMR exome

AF:

0.00

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:

0.00

Gnomad4 OTH exome

AF:

0.0000217

GnomAD4 genome

AF:

0.0000630

AC:

AN:

111048

Hom.:

Cov.:

AF XY:

0.0000301

AC XY:

AN XY:

33224

show subpopulations

Gnomad4 AFR

AF:

0.000229

Gnomad4 AMR

AF:

0.00

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

Alfa

AF:

0.0000183

Hom.:

Bravo

AF:

0.0000831

ESP6500AA

AF:

0.000522

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

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

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Nov 28, 2018

- -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 29, 2022

The p.T313I variant (also known as c.938C>T), located in coding exon 9 of the DMD gene, results from a C to T substitution at nucleotide position 938. The threonine at codon 313 is replaced by isoleucine, an amino acid with similar properties. Based on data from gnomAD, the T allele has an overall frequency of 0.0025% (5/203475) total alleles studied, with 2 hemizygote(s) observed. The highest observed frequency was 0.0265% (5/18903) of African alleles. This amino acid position is not well 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 alteration remains unclear. -

Duchenne muscular dystrophy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 04, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.50

CADD

Benign

DANN

Uncertain

1.0

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.75

T;.;T;T;T

M_CAP

Benign

0.025

MetaRNN

Benign

0.11

T;T;T;T;T

MetaSVM

Benign

-0.90

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.40

Sift4G

Uncertain

0.031

D;D;D;D;T

Polyphen

0.011, 0.025

.;B;.;.;B

Vest4

0.28

MVP

0.61

MPC

0.11

ClinPred

0.15

GERP RS

3.8

gMVP

0.26

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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