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Updated: Jun 5, 2026
14:08
Study of Protein-protein Interactions in Autophagy Research
Published on: September 9, 2017
Selective autophagy mediated by autophagic adapter proteins
1Molecular Cancer Research Group, Institute of Medical Biology, University of Tromsø, Tromsø, Norway. terje.johansen@uit.no
Autophagy
|December 30, 2010
Summary
Selective autophagy uses cargo receptors like p62 to target ubiquitinated substrates for degradation. These receptors interact with LC3 protein, aggregate, and recognize specific substrates, a conserved mechanism crucial for cellular health.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Autophagy, a cellular degradation process, is increasingly recognized as highly selective.
- Autophagic adapters, such as p62 and NBR1, mediate this selectivity.
- These adapters link ubiquitinated substrates to the autophagosome via LC3 protein.
Purpose of the Study:
- To review the mechanistic basis of selective autophagy in mammalian cells.
- To discuss the degradation of various substrates including misfolded proteins, aggregates, and pathogens.
- To highlight the role of selective autophagy in cell signaling and disease.
Main Methods:
- Review of existing literature on selective autophagy.
- Analysis of the structural and functional requirements for autophagic cargo receptors.
- Discussion of conserved mechanisms across different organisms.
Main Results:
- Selective autophagy requires cargo receptors with specific features: LC3-interacting region (LIR) motif, polymerization/aggregation ability, and substrate recognition.
- These features are conserved from yeast to mammals.
- Selective autophagy degrades diverse substrates like misfolded proteins, p62 bodies, aggresomes, mitochondria, and bacteria.
Conclusions:
- Selective autophagy is a fundamental cellular process with broad implications.
- It plays critical roles in maintaining cellular homeostasis and responding to stress.
- Dysregulation of selective autophagy is linked to diseases such as cancer and immune disorders.
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