General Information of Disease (ID: DIS1FW68)

Disease Name TPM3-related myopathy
Synonyms autosomal dominant TPM3-related myopathy; TPM3 myopathy; TPM3-related myopathy; congenital myopathy related to TPM3
Definition
TPM3-related myopathy is a disorder of the musculoskeletal system that covers a wide spectrum of phenotypes and is caused by pathogenic variants in the skeletal muscle -Tropomyosin gene. These variants lead to a variety of overlapping adult onset and congenital myopathies characterized by muscle weakness, hypotonia, motor delay, myopathic facies, scoliosis, and sometimes respiratory involvement. Histologic findings on skeletal muscle biopsy are variable with nemaline and intranuclear bodies, cap-like lesions, fiber-type disproportion, and dystrophic features even in patients with the same mutation.|The most penetrant phenotype among all of the TPM3-related myopathy disease entities is muscular weakness. While nemaline myopathy is the most common presentation, several other myopathies have been reported in association with TPM3 mutations. The absence of clearly defined and/or distinct differences in molecular mechanism, coupled with noted phenotypic variability (both intra- and inter-familial) for individual variants, indicates that these entities are part of the same clinical spectrum.
Disease Hierarchy
DIS2BIP8: Congenital nervous system disorder
DISLSK9G: Congenital myopathy
DISHOITJ: Qualitative or quantitative defects of tropomyosin
DISD715V: Hereditary neurological disease
DIS1FW68: TPM3-related myopathy

Molecular Interaction Atlas (MIA) of This Disease

Molecular Interaction Atlas (MIA)
This Disease Is Related to 1 DOT Molecule(s)
Gene Name DOT ID Evidence Level Mode of Inheritance REF
TPM3 OT5RU5G6 Definitive Semidominant [1]
------------------------------------------------------------------------------------

References

1 Technical standards for the interpretation and reporting of constitutional copy-number variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics (ACMG) and the Clinical Genome Resource (ClinGen). Genet Med. 2020 Feb;22(2):245-257. doi: 10.1038/s41436-019-0686-8. Epub 2019 Nov 6.