2-71520905-G-C

Variant names:

• chr2-71520905-G-C
• rs398123763
• NM_001130987.2:c.1149+1G>C

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM2_Supporting PS1_Supporting PP4_Strong PVS1

This summary comes from the ClinGen Evidence Repository: The NM_003494.4: c.1053+1G>C variant in DYSF, which is also known as NM_001130987.2: c.1149+1G>C, occurs within the canonical splice donor site of intron 11 and is predicted to cause skipping of biologically relevant exon 11/55, resulting in a frameshift and premature truncation leading to nonsense mediated decay in a gene in which loss of function is an established disease mechanism (PVS1). This variant has been identified in one individual with features of LGMD, where it was observed in unknown phase with a likely pathogenic DYSF variant (NM_003494.4: c.4024C>T p.(Arg1342Trp), 0.25 pts, Jain Foundation Dysferlin Registry internal data communication) (PM3_Supporting not met). This patient had a clinical suspicion of LGMD and absent dysferlin protein expression in skeletal muscle, which is highly specific for DYSF-related LGMD (PP4_Strong). This variant is absent from gnomAD v4.1.0 (PM2_Supporting). Another nucleotide change affecting the same splice donor dinucleotide position and with the same predicted splice effect, NM_003494.4: c.1053+1G>A, is classified as pathogenic for autosomal recessive limb girdle muscular dystrophy by the ClinGen LGMD VCEP (PS1_Supporting). In summary, this variant meets the criteria to be classified as Pathogenic 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; 04/17/2025): PVS1, PP4_Strong, PM2_Supporting, PS1_Supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA347212236/MONDO:0015152/180

• Frequency: Genomes: not found (cov: 32)
• Consequence: DYSF NM_001130987.2 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic reviewed by expert panel P:2 U:1
• Conservation: PhyloP100: 9.88
• Publications: 2 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: Pathogenic. The variant received 14 ACMG points.

• PVS1: For more information check the summary or visit ClinGen Evidence Repository.
• PS1: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP4: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001130987.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYSF	NM_001130987.2	MANE Select	c.1149+1G>C		splice_donor intron	N/A	NP_001124459.1
	DYSF	NM_003494.4	MANE Plus Clinical	c.1053+1G>C		splice_donor intron	N/A	NP_003485.1
	DYSF	NM_001130981.2		c.1146+1G>C		splice_donor intron	N/A	NP_001124453.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYSF	ENST00000410020.8	TSL:1 MANE Select	c.1149+1G>C		splice_donor intron	N/A	ENSP00000386881.3
	DYSF	ENST00000258104.8	TSL:1 MANE Plus Clinical	c.1053+1G>C		splice_donor intron	N/A	ENSP00000258104.3
	DYSF	ENST00000409582.7	TSL:1	c.1146+1G>C		splice_donor intron	N/A	ENSP00000386547.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
1	-	-	Autosomal recessive limb-girdle muscular dystrophy (1)
1	-	-	Distal myopathy with anterior tibial onset;C1850889:Autosomal recessive limb-girdle muscular dystrophy type 2B;C4551973:Miyoshi muscular dystrophy 1 (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Pathogenic	29
DANN	Uncertain	0.99
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.93
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		9.9
GERP RS		5.2
Mutation Taster		=0/100	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		0.66		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.66		Position offset: -1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs398123763; hg19: chr2-71748035;