NM_001130987.2:c.4597T>A

Variant names:

• chr2-71644034-T-A
• rs150139276
• NM_001130987.2:c.4597T>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001130987.2(DYSF):​c.4597T>A​(p.Tyr1533Asn) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,459,826 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Y1533H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: DYSF NM_001130987.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.06
• Publications: 6 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.819

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DYSF	NM_001130987.2	c.4597T>A	p.Tyr1533Asn	missense_variant	Exon 42 of 56	ENST00000410020.8	NP_001124459.1
DYSF	NM_003494.4	c.4480T>A	p.Tyr1494Asn	missense_variant	Exon 41 of 55	ENST00000258104.8	NP_003485.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DYSF	ENST00000410020.8	c.4597T>A	p.Tyr1533Asn	missense_variant	Exon 42 of 56	1	NM_001130987.2	ENSP00000386881.3
DYSF	ENST00000258104.8	c.4480T>A	p.Tyr1494Asn	missense_variant	Exon 41 of 55	1	NM_003494.4	ENSP00000258104.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459826 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 725892

African (AFR) AF: 0.00 AC: 0 AN: 33468

American (AMR) AF: 0.00 AC: 0 AN: 44458

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26040

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39686

South Asian (SAS) AF: 0.00 AC: 0 AN: 85570

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53314

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5758

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111186

Other (OTH) AF: 0.00 AC: 0 AN: 60346

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neuromuscular disease caused by qualitative or quantitative defects of dysferlin Uncertain:1

Jun 15, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tyrosine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 1494 of the DYSF protein (p.Tyr1494Asn). This variant has not been reported in the literature in individuals affected with DYSF-related conditions. 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. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.91
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.82	.;.;.;.;D;.;.;.;.;.;.
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Pathogenic	0.98	D;D;D;D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.095	D
MetaRNN	Pathogenic	0.82	D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.69	D
MutationAssessor	Uncertain	2.6	.;.;.;.;M;.;.;.;.;.;.
PhyloP100		7.1
PrimateAI	Uncertain	0.63	T
PROVEAN	Pathogenic	-7.3	D;D;D;D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.71
Sift	Pathogenic	0.0	D;D;D;D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.0030	D;D;D;D;D;D;D;D;D;D;D
Polyphen		0.94	P;D;B;P;D;P;D;D;D;D;P
Vest4		0.93
MutPred		0.54		.;.;.;.;Gain of disorder (P = 0.0195);.;.;.;.;.;.;
MVP		0.93
MPC		0.83
ClinPred		1.0	D
GERP RS		6.1
Varity_R		0.86
gMVP		0.81
Mutation Taster		=15/85	disease causing

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

Other links and lift over

dbSNP: rs150139276; hg19: chr2-71871164;