chr2-71598577-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: The NM_003494.4: c.3534C>T p.(Ile1178=) variant in DYSF, which is also known as NM_001130987.2: c.3588C>T (p.Ile1196=), is a synonymous (silent) variant that is not located in a splice region (outside of the first and the last 3 bases of the exon). The filtering allele frequency for this variant is 0.008874 in gnomAD v4.1.0 (the lower threshold of the 95% CI of 10642/1180038 European (non-Finnish) chromosomes), which is higher than the VCEP threshold of 0.003 (BA1). This variant was detected in a heterozygous state in one individual with suspected LGMD and absent dysferlin expression by blood monocyte assay. No second variant in DYSF was identified, and this individual also had two variants in DNAJB6 (PMID:25493284, 36983702). The SpliceAI prediction score for this variant is 0.27, which is greater than the VCEP threshold of <0.05 (BP4 not met). However, RNASeq data showed this variant does not affect splicing (PMID:36983702). 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; 05/19/2025): BA1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA152665/MONDO:0015152/180

Frequency

Genomes: 𝑓 0.0061 ( 6 hom., cov: 33)

Exomes 𝑓: 0.0079 ( 53 hom. )

Consequence

DYSF
NM_001130987.2 synonymous

Scores

Clinical Significance

Benign reviewed by expert panel U:3B:11

Conservation

PhyloP100: -0.617

Publications

8 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 -8 ACMG points.

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.3588C>T	p.Ile1196Ile	synonymous_variant	Exon 33 of 56	ENST00000410020.8	NP_001124459.1	O75923-13
DYSF	NM_003494.4 link	c.3534C>T	p.Ile1178Ile	synonymous_variant	Exon 33 of 55	ENST00000258104.8	NP_003485.1	O75923-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DYSF	ENST00000410020.8 link	c.3588C>T	p.Ile1196Ile	synonymous_variant	Exon 33 of 56	1	NM_001130987.2	ENSP00000386881.3		O75923-13
DYSF	ENST00000258104.8 link	c.3534C>T	p.Ile1178Ile	synonymous_variant	Exon 33 of 55	1	NM_003494.4	ENSP00000258104.3		O75923-1

Frequencies

GnomAD3 genomes

AF:

0.00614

AC:

934

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00169

Gnomad AMI

AF:

0.0340

Gnomad AMR

AF:

0.00196

Gnomad ASJ

AF:

0.0156

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00828

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00948

Gnomad OTH

AF:

0.00573

GnomAD2 exomes

AF:

0.00666

AC:

1673

AN:

251142

AF XY:

0.00678

show subpopulations

Gnomad AFR exome

AF:

0.00123

Gnomad AMR exome

AF:

0.00156

Gnomad ASJ exome

AF:

0.0130

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00827

Gnomad NFE exome

AF:

0.0105

Gnomad OTH exome

AF:

0.00750

GnomAD4 exome

AF:

0.00787

AC:

11498

AN:

1461862

Hom.:

Cov.:

AF XY:

0.00790

AC XY:

5747

AN XY:

727226

show subpopulations

African (AFR)

AF:

0.00128

AC:

AN:

33480

American (AMR)

AF:

0.00186

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.0115

AC:

300

AN:

26136

East Asian (EAS)

AF:

0.000101

AC:

AN:

39700

South Asian (SAS)

AF:

0.00179

AC:

154

AN:

86258

European-Finnish (FIN)

AF:

0.00938

AC:

501

AN:

53404

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00899

AC:

9997

AN:

1112004

Other (OTH)

AF:

0.00679

AC:

410

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.468

Heterozygous variant carriers

697

1394

2090

2787

3484

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

350

700

1050

1400

1750

<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:

0.00613

AC:

934

AN:

152336

Hom.:

Cov.:

AF XY:

0.00584

AC XY:

435

AN XY:

74504

show subpopulations

African (AFR)

AF:

0.00168

AC:

AN:

41576

American (AMR)

AF:

0.00196

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.0156

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000622

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00828

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00948

AC:

645

AN:

68034

Other (OTH)

AF:

0.00567

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

109

164

218

273

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.00789

Hom.:

Bravo

AF:

0.00560

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.00791

EpiControl

AF:

0.00759

ClinVar

Significance: Benign

Submissions summary: Uncertain:3Benign:11

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not specified

Benign:4

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Sep 06, 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. -

Jul 10, 2015

Eurofins Ntd Llc (ga)

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. -

not provided

Benign:3

Nov 24, 2017

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

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

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Apr 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

DYSF: BS2 -

Neuromuscular disease caused by qualitative or quantitative defects of dysferlin

Uncertain:1Benign:1

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Limb-girdle muscular dystrophy, recessive

Uncertain:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Miyoshi myopathy

Uncertain:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy

Benign:1

May 19, 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.3534C>T p.(Ile1178=) variant in DYSF, which is also known as NM_001130987.2: c.3588C>T (p.Ile1196=), is a synonymous (silent) variant that is not located in a splice region (outside of the first and the last 3 bases of the exon). The filtering allele frequency for this variant is 0.008874 in gnomAD v4.1.0 (the lower threshold of the 95% CI of 10642/1180038 European (non-Finnish) chromosomes), which is higher than the VCEP threshold of 0.003 (BA1). This variant was detected in a heterozygous state in one individual with suspected LGMD and absent dysferlin expression by blood monocyte assay. No second variant in DYSF was identified, and this individual also had two variants in DNAJB6 (PMID: 25493284, 36983702). The SpliceAI prediction score for this variant is 0.27, which is greater than the VCEP threshold of <0.05 (BP4 not met). However, RNASeq data showed this variant does not affect splicing (PMID: 36983702). 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; 05/19/2025): BA1. -

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

- -

Miyoshi muscular dystrophy 1

Benign:1

May 18, 2021

Genome-Nilou Lab

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.27

CADD

Benign

5.3

(source)

DANN

Benign

0.70

PhyloP100

-0.62

Mutation Taster

=97/3

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.27

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.27

Position offset: -13

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