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Updated: Nov 7, 2025

Assays for the Degradation of Misfolded Proteins in Cells
Published on: August 28, 2016
Quality control of mislocalized and orphan proteins
Ka-Yiu Edwin Kong1, João P L Coelho2, Matthias J Feige2
1Institute of Molecular Biology (IMB), Mainz, Germany.
Cellular proteome homeostasis is vital but challenged by protein errors. This review covers quality control for mislocalized and orphan proteins, linking their accumulation to aging and disease.
Area of Science:
- Cellular Biology
- Molecular Biology
- Biochemistry
Background:
- Proteome homeostasis is crucial for cell physiology.
- Protein metabolism is error-prone, leading to aberrant proteins.
- Environmental changes can disrupt protein structure and function.
Purpose of the Study:
- To review quality control mechanisms for mislocalized and orphan proteins.
- To highlight common principles in aberrant protein recognition.
- To summarize the link between aberrant proteins, aging, and disease.
Main Methods:
- Literature review of recent findings on protein quality control.
- Analysis of mechanisms for recognizing mislocalized proteins.
- Analysis of mechanisms for recognizing orphan proteins.
Main Results:
- Quality control systems identify and manage mislocalized and orphan proteins.
- Common principles underlie the recognition of these aberrant proteins.
- Accumulation of mislocalized and orphan proteins is associated with aging and disease.
Conclusions:
- Effective quality control is essential for maintaining proteome homeostasis.
- Dysfunctional quality control contributes to aging and disease pathogenesis.
- Further research into these mechanisms could yield therapeutic targets.
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