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. 1993 Jun;91(6):2861–2865. doi: 10.1172/JCI116530

Skeletal muscle expression and abnormal function of beta-myosin in hypertrophic cardiomyopathy.

G Cuda 1, L Fananapazir 1, W S Zhu 1, J R Sellers 1, N D Epstein 1
PMCID: PMC443355  PMID: 8514894

Abstract

Hypertrophic cardiomyopathy is an important inherited disease. The phenotype has been linked, in some kindreds, to the beta-myosin heavy chain (beta-MHC) gene. Missense and silent mutations in the beta-MHC gene were used as markers to demonstrate the expression of mutant and normal cardiac beta-MHC gene message in skeletal muscle of hypertrophic cardiomyopathy patients. Mutant beta-myosin, also shown to be present in skeletal muscle by Western blot analysis, translocated actin filaments slower than normal controls in an in vitro motility assay. Thus, single amino acid changes in beta-myosin result in abnormal actomyosin interactions, confirming the primary role of missense mutations in beta-MHC gene in the etiology of hypertrophic cardiomyopathy.

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Selected References

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