rs148759919

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP6

The NM_004393.6(DAG1):c.1022C>T(p.Thr341Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000749 in 1,610,830 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00055 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00077 ( 1 hom. )

Consequence

DAG1
NM_004393.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:3

Conservation

PhyloP100: 7.91

Variant links:

Genes affected

DAG1 (HGNC:2666): (dystroglycan 1) This gene encodes dystroglycan, a central component of dystrophin-glycoprotein complex that links the extracellular matrix and the cytoskeleton in the skeletal muscle. The encoded preproprotein undergoes O- and N-glycosylation, and proteolytic processing to generate alpha and beta subunits. Certain mutations in this gene are known to cause distinct forms of muscular dystrophy. Alternative splicing results in multiple transcript variants, all encoding the same protein. [provided by RefSeq, Nov 2015]

DAG1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.07787055).

BP6

Variant 3-49531533-C-T is Benign according to our data. Variant chr3-49531533-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 283316.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=5}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DAG1	NM_004393.6 linkuse as main transcript	c.1022C>T	p.Thr341Ile	missense_variant	3/3	ENST00000308775.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DAG1	ENST00000308775.7 linkuse as main transcript	c.1022C>T	p.Thr341Ile	missense_variant	3/3	1	NM_004393.6	P1

Frequencies

GnomAD3 genomes

AF:

0.000552

AC:

AN:

152080

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00207

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000971

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000566

AC:

142

AN:

250804

Hom.:

AF XY:

0.000642

AC XY:

AN XY:

135566

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00164

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000688

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000770

AC:

1123

AN:

1458632

Hom.:

Cov.:

AF XY:

0.000828

AC XY:

600

AN XY:

724842

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.0000384

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00205

Gnomad4 FIN exome

AF:

0.000112

Gnomad4 NFE exome

AF:

0.000785

Gnomad4 OTH exome

AF:

0.000914

GnomAD4 genome

AF:

0.000552

AC:

AN:

152198

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74414

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00207

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.000971

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000730

Hom.:

Bravo

AF:

0.000495

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000502

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000600

EpiControl

AF:

0.000771

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:4Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Mar 29, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Dec 20, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2016	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Sep 17, 2021	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 21388311) -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 08, 2018	- -

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A9;C4511963:Autosomal recessive limb-girdle muscular dystrophy type 2P

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 08, 2022

This sequence change replaces threonine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 341 of the DAG1 protein (p.Thr341Ile). This variant is present in population databases (rs148759919, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with DAG1-related conditions. ClinVar contains an entry for this variant (Variation ID: 283316). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt DAG1 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 23, 2021

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. -

DAG1-related condition

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 17, 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). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.61

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Uncertain

-0.080

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.78

D;D;D;D;D;D

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.96

D;.;.;.;.;.

M_CAP

Benign

0.049

MetaRNN

Benign

0.078

T;T;T;T;T;T

MetaSVM

Benign

-0.58

MutationAssessor

Uncertain

2.2

M;M;M;M;M;M

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Uncertain

0.71

PROVEAN

Uncertain

-3.0

D;D;D;D;D;D

REVEL

Uncertain

0.30

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D;D;D

Polyphen

1.0

D;D;D;D;D;D

Vest4

0.54

MVP

0.51

MPC

1.0

ClinPred

0.11

GERP RS

5.7

Varity_R

0.53

gMVP

0.83

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