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Related Experiment Video

Updated: Apr 22, 2026

Escherichia coli-Based Cell-Free Protein Synthesis: Protocols for a robust, flexible, and accessible platform technology
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Optimizing Pichia Pastoris Cell-Free Protein Synthesis to Improve Economics.

Rui Wu1,2, Igor Koop3, Gavin Murugan1

  • 1Department of Chemical Engineering, Imperial College London, London, UK.

Biotechnology and Bioengineering
|April 20, 2026
PubMed
Summary

We optimized Pichia pastoris cell-free protein synthesis (CFPS) by adding stabilizers and improving DNA sequences. This enhanced protein yield tenfold and cut production costs by 89%, making CFPS more economical.

Keywords:
KozakPichia pastoris/Komagataella phaffibiomanufacturingcell‐free protein synthesisglycolytic energy metabolism

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Synthetic Biology

Background:

  • Cell-free protein synthesis (CFPS) offers a versatile platform for protein production and genetic studies.
  • Pichia pastoris CFPS combines prokaryotic and eukaryotic advantages but faces limitations in yield and cost.
  • Optimizing P. pastoris CFPS is crucial for its wider adoption in research and biopharmaceutical manufacturing.

Purpose of the Study:

  • To enhance the efficiency and reduce the cost of Pichia pastoris cell-free protein synthesis (CFPS).
  • To identify optimal chemical additives and DNA sequence modifications for improved protein yields.
  • To explore cost-effective energy regeneration systems for sustainable CFPS.

Main Methods:

  • Systematic screening of chemical additives (stabilizers, crowding agents) for optimal CFPS reactions.
  • Application of machine learning to predict translation initiation rates and optimize Kozak sequences.
  • Evaluation of glycolytic intermediates as alternative substrates for ATP regeneration.

Main Results:

  • A 10-fold increase in protein yield was achieved with optimized conditions.
  • The cost per gram of protein was reduced by 89% compared to the baseline.
  • Identified PEG-6000 and spermidine as key additives, alongside a modified Kozak sequence.

Conclusions:

  • Protein-stabilizing additives and rationally designed DNA sequences significantly enhance CFPS yield.
  • Pichia pastoris CFPS is a cost-effective and efficient platform for protein production.
  • Glycolytic intermediates offer a viable secondary energy system for cost-effective CFPS development.