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In the thick of it: HCM-causing mutations in myosin binding proteins of the thick filament

Samantha P Harris1, Ross G Lyons, Kristina L Bezold

  • 1Department of Neurobiology, Physiology, and Behavior College of Biological Sciences, University of California, One Shields Ave, Davis, CA 95616, USA. samharris@ucdavis.edu

Circulation Research
|March 19, 2011
PubMed

Insights

Familial hypertrophic cardiomyopathy (HCM) mutations in thick filament proteins, like cardiac myosin binding protein C (cMyBP-C), are common but poorly understood. This review links known mutations to protein function, aiding HCM research.

Area of Science:

  • Cardiovascular Biology
  • Molecular Cardiology
  • Genetic Medicine

Background:

  • Familial hypertrophic cardiomyopathy (HCM) is linked to numerous sarcomeric protein mutations.
  • Mutations in thick filament binding proteins, particularly cardiac myosin binding protein (cMyBP)-C, are frequently implicated in inherited cardiomyopathies.
  • The functional impact and disease mechanisms of these mutations remain incompletely understood.

Purpose of the Study:

  • To review known disease-causing mutations in major thick filament binding proteins.
  • To correlate these mutations with specific protein functions.
  • To advance understanding of HCM pathogenesis.

Main Methods:

  • Literature review of sarcomeric protein mutations associated with HCM.
  • Analysis of functional consequences of identified mutations.
  • Synthesis of current knowledge on thick filament protein biology.

Main Results:

  • A significant number of mutations affect myosin binding proteins, including myosin light chains and cMyBP-C.
  • These mutations are linked to HCM, but their precise mechanisms of disease causation require further elucidation.
  • Thick filament proteins are identified as dynamic regulators of muscle contraction.

Conclusions:

  • Discovery of HCM mutations has significantly advanced the understanding of thick filament protein biology.
  • Myosin binding proteins play a crucial role in regulating muscle contraction force and speed.
  • Further research is necessary to clarify how specific mutations lead to hypertrophic phenotypes.

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