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Molecular Chaperones and Protein Folding

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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
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Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...

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Related Experiment Video

Updated: Apr 16, 2026

Assays for the Degradation of Misfolded Proteins in Cells

Assays for the Degradation of Misfolded Proteins in Cells

Published on: August 28, 2016

Molecular chaperones and neuronal proteostasis.

Heather L Smith¹, Wenwen Li¹, Michael E Cheetham¹

¹UCL Institute of Ophthalmology, 11-43 Bath Street, London EC1V 9EL, UK.

Seminars in Cell & Developmental Biology

|March 16, 2015

Summary

Molecular chaperones are crucial for protein homeostasis and preventing neurodegenerative diseases. Enhancing chaperone function offers a promising therapeutic strategy for these debilitating conditions.

Keywords:

Heat shock response Molecular chaperone Neurodegeneration Neuroprotection Protein aggregation Unfolded protein response

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Area of Science:

Neuroscience
Molecular Biology
Cell Biology

Background:

Protein homeostasis (proteostasis) is vital for cellular function.
Disrupted proteostasis leads to misfolded proteins, aggregation, and cytotoxicity, implicated in neurodegenerative diseases.
Neurons possess a protein quality control network, with molecular chaperones as key components.

Purpose of the Study:

To review the critical role of molecular chaperones in neurodegenerative diseases.
To discuss the protective mechanisms employed by molecular chaperones.
To highlight molecular chaperones as potential therapeutic targets.

Main Methods:

Literature review focusing on molecular chaperones and neurodegenerative disease.
Analysis of studies investigating chaperone function in protein folding and aggregation.
Examination of research on chaperone-based therapeutic strategies.

Main Results:

Molecular chaperones promote proper protein folding and target misfolded proteins for clearance.
Increased chaperone expression can mitigate protein aggregation and toxicity in disease models.
Mutations in certain chaperones are linked to inherited neurodegenerative disorders.

Conclusions:

Molecular chaperones are essential for neuronal health and proteostasis.
Therapeutic strategies aimed at enhancing chaperone activity show promise for treating neurodegenerative diseases.
Further research into chaperone mechanisms can unlock new treatment avenues.