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Autophagy01:27

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Study of Protein-protein Interactions in Autophagy Research
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Synthetic autophagy receptor.

Ziwen Jiang1,2, Yu-Hsuan Kuo1,2, Michelle R Arkin1,2

  • 1Department of Pharmaceutical Chemistry, University of California, San Francisco, CA, USA.

Autophagy
|November 7, 2023
PubMed
Summary
This summary is machine-generated.

Researchers engineered synthetic autophagy receptors (AceTACs) by modifying SQSTM1/p62. These AceTACs successfully targeted aggregation-prone proteins and organelles for degradation via autophagy.

Keywords:
Antibody-fusion proteinautophagy receptorproximity-based therapeuticstargeted organelle degradationtargeted protein degradation

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Autophagy receptors link ubiquitinated substrates to phagophores for degradation.
  • Autophagy receptors interact with both substrates and LC3/GABARAP proteins on expanding phagophore membranes.
  • SQSTM1/p62 is a key mammalian autophagy receptor involved in substrate recognition.

Purpose of the Study:

  • To develop and characterize synthetic autophagy receptors (AceTACs).
  • To engineer AceTACs for targeted degradation of specific proteins and organelles.
  • To investigate the potential of AceTACs in modulating autophagy pathways.

Main Methods:

  • Engineering of SQSTM1/p62 domains to create AceTACs.
  • Replacement of the ubiquitin-associated domain of SQSTM1 with target-specific antibodies.
  • Demonstration of targeted protein degradation using AceTAC degraders.
  • Development of a model system for organelle degradation via autophagy.

Main Results:

  • Successfully designed and synthesized a series of AceTACs.
  • Demonstrated targeted degradation of aggregation-prone proteins using AceTACs.
  • Established a model system for inducing targeted organelle degradation through autophagy.
  • Validated the bifunctional redirection capabilities of engineered autophagy receptors.

Conclusions:

  • AceTACs represent a novel strategy for targeted protein and organelle degradation via autophagy.
  • Engineered autophagy receptors offer a versatile platform for manipulating cellular degradation pathways.
  • This research provides a guideline for inducing targeted degradation of cellular components.