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Related Experiment Video

Updated: May 24, 2026

Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
14:25

Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain

Published on: December 12, 2017

Single pH buffer refolding screen for protein from inclusion bodies.

Bruno Coutard1, Etienne G J Danchin, Rachid Oubelaid

  • 1Architecture et Fonction des Macromolécules Biologiques (AFMB), UMR 7257 CNRS and Aix-Marseille University, 163, Avenue de Luminy, Case 932, 13288 Marseille, Cedex 09, France.

Protein Expression and Purification
|February 21, 2012
PubMed
Summary

Researchers identified general rules for refolding recombinant proteins. Acidic proteins refolded best in alkaline buffers, and alkaline proteins in acidic buffers, simplifying protein refolding strategies.

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Area of Science:

  • Biochemistry
  • Protein Chemistry
  • Molecular Biology

Background:

  • Recombinant protein expression in Escherichia coli often results in insoluble inclusion bodies.
  • Efficient refolding of these proteins is crucial for their functional recovery and downstream applications.
  • Previous work established an automated 96-buffer screen for protein refolding.

Purpose of the Study:

  • To analyze experimental data from a high-throughput protein refolding screen to identify general refolding rules.
  • To determine if protein refolding can be predicted based on protein properties and buffer conditions.
  • To develop a simplified, more efficient refolding screen based on identified rules.

Main Methods:

  • Analysis of refolding data from 24 recombinant proteins screened in 96 different buffer conditions.

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Last Updated: May 24, 2026

Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain
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Method for Efficient Refolding and Purification of Chemoreceptor Ligand Binding Domain

Published on: December 12, 2017

Stability and Structure of Bat Major Histocompatibility Complex Class I with Heterologous &beta;2-Microglobulin
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Stability and Structure of Bat Major Histocompatibility Complex Class I with Heterologous β2-Microglobulin

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  • Statistical analysis of protein isoelectric point (pI) and buffer pH, ionic strength, and detergent composition.
  • Validation of a new, simplified refolding screen based on identified general rules.

    • Main Results:

    • A significant correlation was observed between protein isoelectric point (pI) and optimal refolding buffer pH: acidic proteins refolded better in alkaline buffers, and vice versa.
    • The solubility of proteins increased with the difference between their pI and the average buffer pH.
    • A simplified refolding screen using single buffers for acidic and alkaline proteins was successfully validated.

    Conclusions:

    • Protein refolding can be guided by general rules, primarily related to the isoelectric point (pI) of the protein and the pH of the refolding buffer.
    • The development of simplified refolding screens significantly enhances efficiency and reduces resource requirements.
    • These findings provide a more predictable and streamlined approach to recombinant protein refolding.