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Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.11 DYSF Achchuthan Shanmugasundram changed review comment from: PMID:17287450 (2007) reported two unrelated patuients, one with limb girdle weakness and the other with distal weakness, who presented with elecvated CK, patholgical MRI and reduced dysferlin expression in a muscle biopsy specimen. First patient was the sister of an autosomal recessive limb-girdle muscular dystrophy patient and patient 2 was the father of two offspring with Miyoshi myopathy. The two patients wer identified with variant in one allele (patient 1: p.Asp625Tyr; patient 2: p.Gly519Arg) of DYSF gene, whereas as family members with AR disease harboured compund heterozygous or homozygous variants.

PMID:21658164 (2011) reported two unrelated patients identified with a heterozygous variant in DYSF gene (p.Glu1763Asp). First patient had proximal weakness of the lower limbs and was unable to walk on her toes and heels since the age of 18 years and her brother had asymptomatic hyperCKemia. Second pateint, who was previolusly active in sports presented in late adolescence with distal myopathy. Both patients had high CK activity and electromyography showed myopathic changes. The parents of neither patients had muscle weakness. The variant was found in heterozygous state in mother, grandfather and brother of patient 1, while it is not detected in father of patient 2 and mother's DNA wasn't available.

PMID:29879922 (2018) reported a South African family of mixed descent in which all affetced first generation (G1) members presented with a predominant distal ‘posterior calf’ myopathy starting in early adulthood. Their offspring (G2) experienced severe unexpected symptoms of myalgia and cramps since adolescence. All affected G1 individuals were homozygous for a novel truncating p.Tyr1433Ter DYSF variant, with their asymptomatic sibling and pauci-symptomatic G2 offspring carrying only a single variant allele.

PMID:35962550 (2022) reported a large family with progressive muscular dystrophy and hyperCKaemia and was identified with a monoallelic novel DYSF variant (p.Tyr2070Metfs*4). Skeletal muscle involvement was milder and later onset than typical dysferlinopathy presentations; these clinical signs manifested in four individuals, all between the fourth and sixth decades of life. The study showed a consistent dysferlinopathy phenotype across three generations, with dystrophic muscle changes and fatty replacement, reduced dysferlin protein expression, but no evidence that the C‑terminal DYSF variant triggers mRNA decay.

Monoallelic DYSF variants are not yet associated with any phenotypes in OMIM.; to: PMID:17287450 (2007) reported two unrelated patuients, one with limb girdle weakness and the other with distal weakness, who presented with elecvated CK, patholgical MRI and reduced dysferlin expression in a muscle biopsy specimen. First patient was the sister of an autosomal recessive limb-girdle muscular dystrophy patient and patient 2 was the father of two offspring with Miyoshi myopathy. The two patients wer identified with variant in one allele (patient 1: p.Asp625Tyr; patient 2: p.Gly519Arg) of DYSF gene, whereas as family members with AR disease harboured compund heterozygous or homozygous variants.

PMID:21658164 (2011) reported two unrelated patients identified with a heterozygous variant in DYSF gene (p.Glu1763Asp). First patient had proximal weakness of the lower limbs and was unable to walk on her toes and heels since the age of 18 years and her brother had asymptomatic hyperCKemia. Second patient, who was previously active in sports presented in late adolescence with distal myopathy. Both patients had high CK activity and electromyography showed myopathic changes. The parents of neither patients had muscle weakness. The variant was found in heterozygous state in mother, grandfather and brother of patient 1, while it is not detected in father of patient 2 and mother's DNA wasn't available.

PMID:29879922 (2018) reported a South African family of mixed descent in which all affetced first generation (G1) members presented with a predominant distal ‘posterior calf’ myopathy starting in early adulthood. Their offspring (G2) experienced severe unexpected symptoms of myalgia and cramps since adolescence. All affected G1 individuals were homozygous for a novel truncating p.Tyr1433Ter DYSF variant, with their asymptomatic sibling and pauci-symptomatic G2 offspring carrying only a single variant allele.

PMID:35962550 (2022) reported a large family with progressive muscular dystrophy and hyperCKaemia and was identified with a monoallelic novel DYSF variant (p.Tyr2070Metfs*4). Skeletal muscle involvement was milder and later onset than typical dysferlinopathy presentations; these clinical signs manifested in four individuals, all between the fourth and sixth decades of life. The study showed a consistent dysferlinopathy phenotype across three generations, with dystrophic muscle changes and fatty replacement, reduced dysferlin protein expression, but no evidence that the C‑terminal DYSF variant triggers mRNA decay.

Monoallelic DYSF variants are not yet associated with any phenotypes in OMIM.
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.11 DYSF Achchuthan Shanmugasundram Publications for gene: DYSF were set to http://www.ncbi.nlm.nih.gov/books/NBK1408/
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.10 DYSF Achchuthan Shanmugasundram Added comment: Comment on mode of inheritance: There are at least 6 unrelated families with heterozygous carrier individuals presenting with a limb-girdle muscular dystrophy/ myopathy phenotype despite it being milder and later-onset than individuals with biallelic variants. There is also evidence of some heterozygous carriers from two of the families not displaying phenotype suggesting reduced penetrance.

As there are six unrelated families with monoalellic phenotype, the MOI should be updated to 'BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal' in the next GMS update.
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.10 DYSF Achchuthan Shanmugasundram Mode of inheritance for gene: DYSF was changed from BIALLELIC, autosomal or pseudoautosomal to BIALLELIC, autosomal or pseudoautosomal
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.9 DYSF Achchuthan Shanmugasundram Tag Q2_26_MOI tag was added to gene: DYSF.
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.9 DYSF Achchuthan Shanmugasundram edited their review of gene: DYSF: Added comment: PMID:17287450 (2007) reported two unrelated patuients, one with limb girdle weakness and the other with distal weakness, who presented with elecvated CK, patholgical MRI and reduced dysferlin expression in a muscle biopsy specimen. First patient was the sister of an autosomal recessive limb-girdle muscular dystrophy patient and patient 2 was the father of two offspring with Miyoshi myopathy. The two patients wer identified with variant in one allele (patient 1: p.Asp625Tyr; patient 2: p.Gly519Arg) of DYSF gene, whereas as family members with AR disease harboured compund heterozygous or homozygous variants.

PMID:21658164 (2011) reported two unrelated patients identified with a heterozygous variant in DYSF gene (p.Glu1763Asp). First patient had proximal weakness of the lower limbs and was unable to walk on her toes and heels since the age of 18 years and her brother had asymptomatic hyperCKemia. Second pateint, who was previolusly active in sports presented in late adolescence with distal myopathy. Both patients had high CK activity and electromyography showed myopathic changes. The parents of neither patients had muscle weakness. The variant was found in heterozygous state in mother, grandfather and brother of patient 1, while it is not detected in father of patient 2 and mother's DNA wasn't available.

PMID:29879922 (2018) reported a South African family of mixed descent in which all affetced first generation (G1) members presented with a predominant distal ‘posterior calf’ myopathy starting in early adulthood. Their offspring (G2) experienced severe unexpected symptoms of myalgia and cramps since adolescence. All affected G1 individuals were homozygous for a novel truncating p.Tyr1433Ter DYSF variant, with their asymptomatic sibling and pauci-symptomatic G2 offspring carrying only a single variant allele.

PMID:35962550 (2022) reported a large family with progressive muscular dystrophy and hyperCKaemia and was identified with a monoallelic novel DYSF variant (p.Tyr2070Metfs*4). Skeletal muscle involvement was milder and later onset than typical dysferlinopathy presentations; these clinical signs manifested in four individuals, all between the fourth and sixth decades of life. The study showed a consistent dysferlinopathy phenotype across three generations, with dystrophic muscle changes and fatty replacement, reduced dysferlin protein expression, but no evidence that the C‑terminal DYSF variant triggers mRNA decay.

Monoallelic DYSF variants are not yet associated with any phenotypes in OMIM.; Changed publications to: 17287450, 21658164, 29879922, 35962550; Changed mode of inheritance: BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.9 DYSF Achchuthan Shanmugasundram Deleted their comment
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.5 DYSF Achchuthan Shanmugasundram Added comment: Comment on mode of inheritance: Although there is sufficient evidence available for the association of biallelic DYSF variants to AR limb-girdle muscular dystrophy, there is only one family reported with monoallelic variants. Hence, the gene should remain rated green with 'BIALLELIC, autosomal or pseudoautosomal' MOI.
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.5 DYSF Achchuthan Shanmugasundram Mode of inheritance for gene: DYSF was changed from BIALLELIC, autosomal or pseudoautosomal to BIALLELIC, autosomal or pseudoautosomal
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.4 DYSF Achchuthan Shanmugasundram Added comment: Comment on phenotypes: Biallelic variants in DYSF gene are associated with relevant phenotypes in OMIM (MIMs #253601, #254130 & #606768) and the records were last accessed 11 June 2026.

Biallelic DYSF variants are also associated with AR limb-girdle muscular dystrophy with 'Definitive' rating by the Muscular Dystrophies and Myopathies GCEP in ClinGen (https://search.clinicalgenome.org/CCID:004715).
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.4 DYSF Achchuthan Shanmugasundram Phenotypes for gene: DYSF were changed from Muscular dystrophy, limb-girdle, type 2B, 253601Myopathy, distal, with anterior tibial onset, 606768Miyoshi muscular dystrophy 1, 254130; Limb-Girdle Muscular Dystrophy, Recessive; Limb-girdle muscular dystrophy to Muscular dystrophy, limb-girdle, autosomal recessive 2, OMIM:253601; Miyoshi muscular dystrophy 1, OMIM:254130; Myopathy, distal, with anterior tibial onset, OMIM:606768
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.3 DYSF Achchuthan Shanmugasundram reviewed gene: DYSF: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Muscular dystrophy, limb-girdle, autosomal recessive 2, OMIM:253601, Miyoshi muscular dystrophy 1, OMIM:254130, Myopathy, distal, with anterior tibial onset, OMIM:606768; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v6.1 DYSF Cassandra Smith reviewed gene: DYSF: Rating: AMBER; Mode of pathogenicity: None; Publications: PMID: 35962550, 39511170; Phenotypes: ; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Limb girdle muscular dystrophies, myofibrillar myopathies and distal myopathies v5.25 CIAO1 Arina Puzriakova Phenotypes for gene: CIAO1 were changed from CIAO1 associated neuromuscular disorder to Multiple mitochondrial dysfunctions syndrome 10, OMIM:620960