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Ribosomes01:27

Ribosomes

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Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome...
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Author Spotlight: Optimizing CFPS Systems for Synthetic Cell Construction
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Creating a completely "cell-free" system for protein synthesis.

Mark Thomas Smith1, Anthony M Bennett1, Jeremy M Hunt1

  • 1Dept. of Chemical Engineering, Brigham Young University, UT, 84602.

Biotechnology Progress
|August 21, 2015
PubMed
Summary

Sterile filtration and lyophilization effectively remove contaminating bacteria from cell-free protein synthesis systems. These methods maintain protein synthesis ability and enable stable, cell-free biotechnology applications.

Keywords:
cell-freein vitro protein synthesislyophilizationprotein synthesissterilization

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Area of Science:

  • Biotechnology
  • Synthetic Biology
  • Molecular Biology

Background:

  • Cell-free protein synthesis (CFPS) offers advantages over in vivo systems, enabling open reaction environments and precise control.
  • CFPS applications include diagnostics, biotherapeutics, protein engineering, and biocatalysis.
  • High-yield CFPS often uses Escherichia coli extracts, but contamination by residual cells is a persistent challenge.

Purpose of the Study:

  • To evaluate decontamination strategies for eliminating bacterial contamination in cell-free systems.
  • To assess the impact of decontamination on protein synthesis capabilities.
  • To enhance the utility of cell-free systems for biotechnology and medicine.

Main Methods:

  • Investigated sterile filtration as a decontamination method.
  • Examined lyophilization (freeze-drying) as a decontamination strategy.
  • Assessed protein synthesis activity post-treatment.

Main Results:

  • Both sterile filtration and lyophilization effectively eliminated contaminating bacteria.
  • Decontamination strategies maintained the protein synthesis capacity of the cell-free systems.
  • Lyophilization offered enhanced long-term stability for storage above freezing.

Conclusions:

  • Sterile filtration and lyophilization are viable methods for creating purified, cell-free systems.
  • These improved cell-free systems can advance personalized medicine, portable diagnostics, and biomanufacturing.
  • Eliminating cellular contaminants broadens the scope and reliability of cell-free biotechnology.