2-71611333-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP2BA1

This summary comes from the ClinGen Evidence Repository: The NM_003494.4: c.3992G>T variant in DYSF, which is also known as NM_001130987.2: c.4046G>T p.(Arg1349Leu), is a missense variant predicted to cause substitution of arginine by leucine at amino acid 1331 (p.Arg1331Leu). The filtering allele frequency of the variant is 0.03441 for European (non-Finnish) genome chromosomes in gnomAD v2.1.1 (the lower threshold of the 95% CI of 943/31374), which is higher than the VCEP threshold of 0.003 (BA1). This variant has also been observed in cis with the variant c.5836_5839del p.(Gln1946TrpfsTer19), which is classified as pathogenic by the ClinGen LGMD VCEP (PMID:19528035) (BP2). The SpliceAI score for this variant is 0, suggesting it does not impact splicing. However, the computational predictor REVEL gives a score of 0.39, which is above the LGMD VCEP threshold predicting a benign impact on DYSF function (≤0.1; BP4 not met). In summary, this variant meets the criteria to be classified as Benign for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen LGMD VCEP (LGMD VCEP specifications version 1.0.0; 01/08/2025): BA1, BP2. LINK:https://erepo.genome.network/evrepo/ui/classification/CA147753/MONDO:0015152/180

Frequency

Genomes: 𝑓 0.023 ( 49 hom., cov: 33)

Exomes 𝑓: 0.023 ( 444 hom. )

Consequence

DYSF
NM_001130987.2 missense

Scores

Clinical Significance

Benign reviewed by expert panel B:14

Conservation

PhyloP100: 3.38

Publications

22 publications found

Variant links:

Genes affected

DYSF (HGNC:3097): (dysferlin) The protein encoded by this gene belongs to the ferlin family and is a skeletal muscle protein found associated with the sarcolemma. It is involved in muscle contraction and contains C2 domains that play a role in calcium-mediated membrane fusion events, suggesting that it may be involved in membrane regeneration and repair. In addition, the protein encoded by this gene binds caveolin-3, a skeletal muscle membrane protein which is important in the formation of caveolae. Specific mutations in this gene have been shown to cause autosomal recessive limb girdle muscular dystrophy type 2B (LGMD2B) as well as Miyoshi myopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2008]

DYSF Gene-Disease associations (from GenCC):

autosomal recessive limb-girdle muscular dystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
neuromuscular disease caused by qualitative or quantitative defects of dysferlin
Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health
autosomal recessive limb-girdle muscular dystrophy type 2B
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
distal myopathy with anterior tibial onset
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
congenital myopathy, Paradas type
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Miyoshi myopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

DYSF links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP2

For more information check the summary or visit ClinGen Evidence Repository.

BA1

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DYSF	NM_001130987.2 link	c.4046G>T	p.Arg1349Leu	missense_variant	Exon 37 of 56	ENST00000410020.8	NP_001124459.1
DYSF	NM_003494.4 link	c.3992G>T	p.Arg1331Leu	missense_variant	Exon 37 of 55	ENST00000258104.8	NP_003485.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DYSF	ENST00000410020.8 link	c.4046G>T	p.Arg1349Leu	missense_variant	Exon 37 of 56	1	NM_001130987.2	ENSP00000386881.3
DYSF	ENST00000258104.8 link	c.3992G>T	p.Arg1331Leu	missense_variant	Exon 37 of 55	1	NM_003494.4	ENSP00000258104.3

Frequencies

GnomAD3 genomes

AF:

0.0234

AC:

3567

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0239

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0162

Gnomad ASJ

AF:

0.0104

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00746

Gnomad FIN

AF:

0.0334

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0273

Gnomad OTH

AF:

0.0191

GnomAD2 exomes

AF:

0.0200

AC:

5004

AN:

250346

AF XY:

0.0196

show subpopulations

Gnomad AFR exome

AF:

0.0252

Gnomad AMR exome

AF:

0.0107

Gnomad ASJ exome

AF:

0.0111

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0287

Gnomad NFE exome

AF:

0.0277

Gnomad OTH exome

AF:

0.0223

GnomAD4 exome

AF:

0.0230

AC:

33595

AN:

1461416

Hom.:

444

Cov.:

AF XY:

0.0223

AC XY:

16206

AN XY:

726992

show subpopulations

African (AFR)

AF:

0.0217

AC:

725

AN:

33470

American (AMR)

AF:

0.0108

AC:

485

AN:

44706

Ashkenazi Jewish (ASJ)

AF:

0.0114

AC:

297

AN:

26132

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.00828

AC:

714

AN:

86238

European-Finnish (FIN)

AF:

0.0327

AC:

1748

AN:

53392

Middle Eastern (MID)

AF:

0.00919

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0255

AC:

28396

AN:

1111646

Other (OTH)

AF:

0.0195

AC:

1175

AN:

60364

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.449

Heterozygous variant carriers

1802

3603

5405

7206

9008

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

1010

2020

3030

4040

5050

<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:

0.0234

AC:

3567

AN:

152292

Hom.:

Cov.:

AF XY:

0.0237

AC XY:

1766

AN XY:

74468

show subpopulations

African (AFR)

AF:

0.0238

AC:

991

AN:

41562

American (AMR)

AF:

0.0161

AC:

247

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.0104

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00767

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.0334

AC:

355

AN:

10616

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0273

AC:

1859

AN:

68026

Other (OTH)

AF:

0.0189

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

186

372

558

744

930

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

126

168

210

<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:

0.0240

Hom.:

Bravo

AF:

0.0212

TwinsUK

AF:

0.0218

AC:

ALSPAC

AF:

0.0239

AC:

ESP6500AA

AF:

0.0243

AC:

107

ESP6500EA

AF:

0.0247

AC:

212

ExAC

AF:

0.0215

AC:

2613

Asia WGS

AF:

0.00404

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:14

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not specified

Benign:7

Feb 08, 2016

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jul 02, 2014

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -

Dec 10, 2021

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

May 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

DYSF: BS1, BS2 -

Neuromuscular disease caused by qualitative or quantitative defects of dysferlin

Benign:2

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy

Benign:1

Jan 08, 2025

ClinGen Limb Girdle Muscular Dystrophy Variant Curation Expert Panel, ClinGen

Significance:Benign

Review Status:reviewed by expert panel

Collection Method:curation

The NM_003494.4: c.3992G>T variant in DYSF, which is also known as NM_001130987.2: c.4046G>T p.(Arg1349Leu), is a missense variant predicted to cause substitution of arginine by leucine at amino acid 1331 (p.Arg1331Leu). The filtering allele frequency of the variant is 0.03441 for European (non-Finnish) genome chromosomes in gnomAD v2.1.1 (the lower threshold of the 95% CI of 943/31374), which is higher than the VCEP threshold of 0.003 (BA1). This variant has also been observed in cis with the variant c.5836_5839del p.(Gln1946TrpfsTer19), which is classified as pathogenic by the ClinGen LGMD VCEP (PMID: 19528035) (BP2). The SpliceAI score for this variant is 0, suggesting it does not impact splicing. However, the computational predictor REVEL gives a score of 0.39, which is above the LGMD VCEP threshold predicting a benign impact on DYSF function (≤0.1; BP4 not met). In summary, this variant meets the criteria to be classified as Benign for autosomal recessive limb girdle muscular dystrophy based on the ACMG/AMP criteria applied, as specified by the ClinGen LGMD VCEP (LGMD VCEP specifications version 1.0.0; 01/08/2025): BA1, BP2. -

Autosomal recessive limb-girdle muscular dystrophy type 2B

Benign:1

Sep 16, 2020

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.48

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.19

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.36

.;.;.;.;T;.;.;.;.;.;.

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.89

D;D;D;D;D;D;D;D;D;D;D

MetaRNN

Benign

0.0083

T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.32

MutationAssessor

Benign

1.6

.;.;L;.;L;.;.;.;.;.;.

PhyloP100

3.4

PrimateAI

Uncertain

0.61

PROVEAN

Benign

-1.7

N;N;N;N;N;N;N;N;N;N;N

REVEL

Uncertain

0.39

Sift

Benign

0.42

T;T;T;T;T;T;T;T;T;T;T

Sift4G

Benign

0.39

T;T;T;T;T;T;T;T;T;T;T

Polyphen

0.016

B;B;P;D;D;D;D;B;D;D;B

Vest4

0.37

MPC

0.24

ClinPred

0.035

GERP RS

4.7

Varity_R

0.25

gMVP

0.77

Mutation Taster

=99/1

polymorphism (auto)

(source)

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