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Large-scale extraction of proteins.

Teresa Cunha1, Raquel Aires-Barros

  • 1Centro de Engenharia Biológica e Quimica, Instituto Superior Técnico, Lisboa, Portugal.

Molecular Biotechnology
|March 6, 2002
PubMed
Summary

Industrial biotechnology faces challenges in purifying recombinant proteins. Aqueous two-phase systems (ATPS) offer an efficient, scalable method for protein separation and concentration, reducing costs and improving recovery.

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Area of Science:

  • Biotechnology
  • Biochemical Engineering
  • Separation Science

Background:

  • Modern biotechnology enables industrial production of foreign proteins via host expression systems.
  • Protein purification from fermentation media is a significant bottleneck, accounting for 50-90% of production costs.
  • There is a critical need for cost-effective, large-scale bioseparation techniques that ensure high purity, recovery, and biological activity.

Purpose of the Study:

  • To highlight aqueous two-phase systems (ATPS) as an integrated solution for protein separation and concentration.
  • To describe the application of ATPS in large-scale downstream processing of fermentation-derived proteins.
  • To detail the equipment and methodologies for industrial-scale protein extraction using ATPS.

Main Methods:

  • Exploration of aqueous two-phase systems (ATPS) for simultaneous separation and concentration of target proteins.
  • Description of large-scale protein extraction equipment, including mixer-settlers and column contractors.
  • Summarization of stagewise and differential column operations, including mass transfer and hydrodynamic parameter considerations for column design.

Main Results:

  • ATPS facilitate process integration, enabling simultaneous separation and concentration of proteins.
  • The ease of scale-up and high partition coefficients of ATPS demonstrate their potential for industrial applications.
  • Methodologies for designing ATPS columns, considering mass transfer, hydrodynamics, and performance parameters, are outlined.

Conclusions:

  • Aqueous two-phase systems (ATPS) present a promising, scalable, and economic approach to overcome downstream processing bottlenecks in recombinant protein production.
  • The described methodologies and equipment support the implementation of ATPS for efficient industrial-scale bioseparation.
  • ATPS offer a viable strategy to reduce production costs while maintaining protein integrity and activity.

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