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The chaperone-assisted selective autophagy complex dynamics and dysfunctions.

Barbara Tedesco1,2, Leen Vendredy3, Vincent Timmerman3

  • 1Laboratory of Experimental Biology, Dipartimento di Scienze Farmacologiche e Biomolecolari, Dipartimento di Eccellenza 2018-2027, Università degli studi di Milano, Milan, Italy.

Autophagy
|January 3, 2023
PubMed
Summary

Chaperone-assisted selective autophagy (CASA) maintains protein homeostasis by degrading misfolded proteins. Dysfunction of the CASA complex, crucial for muscle and nerve cells, leads to serious diseases.

Keywords:
AggresomeBAG3HSPAHSPB8SQSTM1STUB1misfoldingmyopathyneurodegenerative diseasesneuropathyproteostasis

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Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Neuroscience

Background:

  • Proteins require precise folding, transport, and localization for cellular function.
  • Protein quality control systems, including autophagy, prevent damage from misfolded proteins.
  • Chaperone-assisted selective autophagy (CASA) selectively degrades aberrant proteins.

Purpose of the Study:

  • To summarize the current understanding of the CASA complex.
  • To elucidate the dynamics and function of CASA proteins.
  • To discuss the role of CASA in disease and its therapeutic potential.

Main Methods:

  • Literature review of CASA complex function.
  • Analysis of CASA protein interactions and dynamics.
  • Review of genetic mutations affecting CASA and resulting diseases.

Main Results:

  • The CASA complex, comprising HSPA, HSPB8, and BAG3, is vital for proteostasis in muscle and neuronal cells.
  • Mutations in CASA components cause (cardio)myopathies and neurodegenerative disorders.
  • CASA proteins are implicated in the pathogenesis of various diseases.

Conclusions:

  • The CASA complex plays a critical role in maintaining cellular health.
  • Understanding CASA dynamics offers insights into disease mechanisms.
  • CASA components represent potential therapeutic targets for related diseases.