chr2-71515635-G-A

Position:

chr2-71515635-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP3

The NM_001130987.2(DYSF):c.772G>A(p.Val258Met) variant causes a missense change. The variant allele was found at a frequency of 0.000203 in 1,613,910 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V258V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00021 ( 1 hom. )

Consequence

DYSF
NM_001130987.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 6.19

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 5 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_001130987.2

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.823

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DYSF	NM_001130987.2 linkuse as main transcript	c.772G>A	p.Val258Met	missense_variant	8/56	ENST00000410020.8
DYSF	NM_003494.4 linkuse as main transcript	c.676G>A	p.Val226Met	missense_variant	7/55	ENST00000258104.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DYSF	ENST00000410020.8 linkuse as main transcript	c.772G>A	p.Val258Met	missense_variant	8/56	1	NM_001130987.2	A1	O75923-13
DYSF	ENST00000258104.8 linkuse as main transcript	c.676G>A	p.Val226Met	missense_variant	7/55	1	NM_003494.4	A1	O75923-1

Frequencies

GnomAD3 genomes

AF:

0.000171

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000955

AC:

AN:

251368

Hom.:

AF XY:

0.0000662

AC XY:

AN XY:

135876

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.0000578

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:

0.000158

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000207

AC:

302

AN:

1461712

Hom.:

Cov.:

AF XY:

0.000221

AC XY:

161

AN XY:

727162

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000134

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:

0.000255

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.000171

AC:

AN:

152198

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74400

show subpopulations

Gnomad4 AFR

AF:

0.0000964

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000228

Hom.:

Bravo

AF:

0.000159

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000115

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Dec 20, 2023	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 25, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 07, 2021	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Autosomal recessive limb-girdle muscular dystrophy type 2B

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Feb 21, 2020

- -

Qualitative or quantitative defects of dysferlin

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 31, 2022

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 226 of the DYSF protein (p.Val226Met). This variant is present in population databases (rs150345121, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with DYSF-related conditions. ClinVar contains an entry for this variant (Variation ID: 259085). 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 expected to disrupt DYSF 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. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.60

BayesDel_addAF

Uncertain

0.12

BayesDel_noAF

Pathogenic

0.19

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.73

.;.;.;.;D;.;.;.;.;.;.

Eigen

Pathogenic

0.91

Eigen_PC

Pathogenic

0.83

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

1.0

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

M_CAP

Benign

0.056

MetaRNN

Pathogenic

0.82

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

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

2.9

.;.;M;.;M;.;.;.;.;.;.

MutationTaster

Benign

0.86

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

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-2.3

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

REVEL

Pathogenic

0.69

Sift

Uncertain

0.0010

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

Sift4G

Pathogenic

0.0010

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

Polyphen

1.0

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

Vest4

0.75

MVP

0.90

MPC

0.64

ClinPred

0.48

GERP RS

5.0

Varity_R

0.89

gMVP

0.70

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.12

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