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Molecular Chaperones and Protein Folding

Molecular Chaperones and Protein Folding

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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Related Experiment Video

Updated: May 24, 2026

Transient Expression and Cellular Localization of Recombinant Proteins in Cultured Insect Cells

Transient Expression and Cellular Localization of Recombinant Proteins in Cultured Insect Cells

Published on: April 20, 2017

Chaperone and foldase coexpression in the baculovirus-insect cell expression system.

M J Betenbaugh¹, E Ailor, E Whiteley

¹Department of Chemical Engineering, The Johns Hopkins University, 21218-2694, Baltimore, Maryland, U.S.A..

|February 24, 2012

Summary

The baculovirus-insect cell expression system (BEVS) is widely used for recombinant protein production. Optimizing folding and secretion pathways by coexpressing chaperones and foldases can enhance yields of complex proteins.

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Area of Science:

Biotechnology
Molecular Biology
Protein Expression

Background:

The baculovirus-insect cell expression system (BEVS) is a key platform for producing recombinant proteins.
Challenges in BEVS include protein aggregation and inefficient processing, particularly for secreted and membrane proteins.

Purpose of the Study:

To explore strategies for enhancing recombinant protein production in BEVS.
To investigate the role of coexpressed chaperones and foldases in improving protein folding, assembly, and secretion.

Main Methods:

Engineering the folding, assembly, and secretion pathways within the BEVS.
Coexpression of chaperones and foldases with the target recombinant protein.

Main Results:

Coexpression of chaperones and foldases can create an optimal environment for protein folding and assembly.
This approach has the potential to increase yields of valuable complex proteins.

Conclusions:

Engineering BEVS pathways by coexpressing chaperones and foldases is a promising strategy to overcome production limitations.
Future work may involve optimizing oligosaccharide modification and secretion factors for improved protein secretion and glycosylation.
BEVS serves as a valuable in vivo eukaryotic system for studying protein folding and secretion mechanisms.