chr2-71569884-C-T

Variant names:

• chr2-71569884-C-T
• rs202218890
• NM_001130987.2:c.2929C>T

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_001130987.2(DYSF):​c.2929C>T​(p.Arg977Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000353 in 1,613,974 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R977Q) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000037 (0 hom.)
• Consequence: DYSF NM_001130987.2 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:13
• Conservation: PhyloP100: 2.33
• Publications: 28 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 16 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr2-71569885-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 1510740.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.98
• PP5: Variant 2-71569884-C-T is Pathogenic according to our data. Variant chr2-71569884-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 284254.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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.2929C>T	p.Arg977Trp	missense	Exon 27 of 56	NP_001124459.1	O75923-13
	DYSF	NM_003494.4	MANE Plus Clinical	c.2875C>T	p.Arg959Trp	missense	Exon 27 of 55	NP_003485.1	O75923-1
	DYSF	NM_001130981.2		c.2926C>T	p.Arg976Trp	missense	Exon 27 of 56	NP_001124453.1	O75923-7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYSF	ENST00000410020.8	TSL:1 MANE Select	c.2929C>T	p.Arg977Trp	missense	Exon 27 of 56	ENSP00000386881.3	O75923-13
	DYSF	ENST00000258104.8	TSL:1 MANE Plus Clinical	c.2875C>T	p.Arg959Trp	missense	Exon 27 of 55	ENSP00000258104.3	O75923-1
	DYSF	ENST00000409582.7	TSL:1	c.2926C>T	p.Arg976Trp	missense	Exon 27 of 56	ENSP00000386547.3	O75923-7

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152152 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000398 AC: 10 AN: 251350 AF XY: 0.0000515

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000791

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000369 AC: 54 AN: 1461822 Hom.: 0 Cov.: 32 AF XY: 0.0000330 AC XY: 24 AN XY: 727206

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86230

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53392

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000423 AC: 47 AN: 1112000

Other (OTH) AF: 0.0000331 AC: 2 AN: 60396

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152152 Hom.: 0 Cov.: 33 AF XY: 0.0000269 AC XY: 2 AN XY: 74322

African (AFR) AF: 0.00 AC: 0 AN: 41446

American (AMR) AF: 0.00 AC: 0 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5180

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68020

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.0000504 Hom.: 0

Bravo AF: 0.0000264

TwinsUK AF: 0.000539 AC: 2

ALSPAC AF: 0.00 AC: 0

ExAC AF: 0.0000824 AC: 10

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
6	-	-	not provided (6)
3	-	-	Autosomal recessive limb-girdle muscular dystrophy type 2B (3)
1	-	-	Distal myopathy with anterior tibial onset;C1850889:Autosomal recessive limb-girdle muscular dystrophy type 2B;C4551973:Miyoshi muscular dystrophy 1 (1)
1	-	-	DYSF-related disorder (1)
1	-	-	Miyoshi muscular dystrophy 1 (1)
1	-	-	Neuromuscular disease caused by qualitative or quantitative defects of dysferlin (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.43
CADD	Pathogenic	26
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.82	D
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.30	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.86	D
MutationAssessor	Benign	1.4	L
PhyloP100		2.3
PrimateAI	Uncertain	0.71	T
PROVEAN	Pathogenic	-7.3	D
REVEL	Pathogenic	0.77
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.89		Loss of disorder (P = 0.0562)
MVP		0.93
MPC		0.66
ClinPred		0.93	D
GERP RS		5.2
Varity_R		0.91
gMVP		0.76
Mutation Taster		=0/100	disease causing (ClinVar)

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: rs202218890; hg19: chr2-71797014;