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Automated Counterflow Centrifugal System for Small-Scale Cell Processing
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A novel cell autolysis system for cost-competitive downstream processing.

Ivan Hajnal1, Xiangbin Chen1, Guo-Qiang Chen2,3,4

  • 1Peking-Tsinghua Center for Life Sciences, School of Life Science, Tsinghua University, Beijing, 100084, China.

Applied Microbiology and Biotechnology
|June 16, 2016
PubMed
Summary
This summary is machine-generated.

Synthetic biology enables microbial lysis for efficient product release. This new system uses lambda phage SRRz genes to break cell walls, reducing costs in bioprocessing and eliminating mechanical disruption steps.

Keywords:
AutolysisBioplasticsHalomonasPHAPHBSynthetic biology

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Area of Science:

  • Synthetic Biology
  • Biotechnology
  • Molecular Biology

Background:

  • Industrial biological product manufacturing faces cost challenges, particularly for low value-added products.
  • A key bottleneck is the mechanical disruption of microbial cell walls to release intracellular products, increasing capital expenditure (capex) and reducing efficiency.
  • Synthetic biology offers potential solutions to overcome these production bottlenecks.

Purpose of the Study:

  • To develop and implement a novel synthetic biology standard part for controlled microbial cell lysis.
  • To enable efficient release of intracellular products by eliminating the need for mechanical cell disruption.
  • To reduce cost pressures and capex barriers in industrial bioprocessing.

Main Methods:

  • Implementation of a synthetic biology standard part utilizing lambda phage SRRz genes and a synthetic ribosome binding site (RBS).
  • Testing the functionality of the synthetic part in Escherichia coli and Halomonas campaniensis.
  • Inducing cell lysis via the addition of small amounts of solvents (1-5%) or through spontaneous lysis during downstream processing stresses.

Main Results:

  • Successful implementation of the synthetic lysis system in both Escherichia coli and Halomonas campaniensis.
  • Demonstrated ability of the system to induce lysis upon solvent addition or during downstream processing.
  • Potential to eliminate the mechanical cell disruption step in bioprocesses.

Conclusions:

  • The developed synthetic biology part based on lambda phage SRRz genes provides a novel method for controlled microbial lysis.
  • This approach can significantly reduce costs and improve efficiency in the industrial production of biological products like bioplastics and biofuels.
  • The system has the potential to revolutionize downstream processing by removing a major bottleneck and capex barrier.