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Related Concept Videos

The Proteasome01:13

The Proteasome

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Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
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The Proteasome02:18

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Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
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The Proteasome02:18

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Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Cardiomyopathy V: Interprofessional Care01:29

Cardiomyopathy V: Interprofessional Care

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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Related Experiment Video

Updated: Mar 7, 2026

Monitoring of Ubiquitin-proteasome Activity in Living Cells Using a Degron dgn-destabilized Green Fluorescent Protein GFP-based Reporter Protein
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Proteasome dysfunction in cardiomyopathies.

Jennifer E Gilda1, Aldrin V Gomes1,2

  • 1Department of Neurobiology, Physiology, and Behaviour, University of California, Davis, CA, 95616, USA.

The Journal of Physiology
|February 10, 2017
PubMed
Summary
This summary is machine-generated.

The ubiquitin-proteasome system (UPS) is vital for heart health. UPS dysfunction is linked to cardiomyopathies, potentially caused by genetic mutations affecting protein clearance and cellular stress.

Keywords:
cardiomyopathiesdilated cardiomyopathyhypertrophic cardiomyopathyproteasomerestrictive cardiomyopathysarcomereubiquitin

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Area of Science:

  • Cardiovascular Biology
  • Molecular Cell Biology
  • Proteostasis

Background:

  • The ubiquitin-proteasome system (UPS) regulates intracellular protein levels, crucial for cellular homeostasis.
  • The heart's high metabolic and mechanical demands necessitate robust proteasome function for protein quality control.
  • Proteasome dysfunction is implicated in various cardiac pathologies, including cardiomyopathies and heart failure.

Purpose of the Study:

  • To review experimental evidence linking UPS dysfunction to cardiomyopathies, particularly hypertrophic cardiomyopathy.
  • To explore potential mechanisms by which genetic mutations cause proteasome impairment in the heart.

Main Methods:

  • Review of existing experimental data and literature on UPS function in cardiac disease.
  • Analysis of proposed molecular mechanisms connecting cardiomyopathy-causing mutations to proteasome dysfunction.

Main Results:

  • UPS dysfunction is a common feature across different cardiomyopathies.
  • Sarcomeric mutations in hypertrophic cardiomyopathy are associated with impaired proteasome function.
  • Proposed mechanisms include altered calcium handling and mitochondrial dysfunction-induced oxidative stress.

Conclusions:

  • UPS dysfunction is a significant factor in the pathogenesis of cardiomyopathies.
  • Understanding these mechanisms may reveal therapeutic targets for heart muscle diseases.