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Quantification of Interlaboratory Cell-Free Protein Synthesis Variability.

Stephanie D Cole1,2, Kathryn Beabout3,4, Kendrick B Turner5

  • 1US Army Combat Capabilities Development Command Chemical Biological Center . 8198 Blackhawk Road , APG , Maryland 21010 , United States.

ACS Synthetic Biology
|August 7, 2019
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Summary
This summary is machine-generated.

This study quantifies interlaboratory variability in cell-free protein synthesis (CFPS), finding significant differences between labs and operators. Standardizing reagent preparation is key to improving CFPS reproducibility for synthetic biology applications.

Keywords:
cell-freecell-free protein synthesisreproducibilitystandardizationvariability

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Area of Science:

  • Synthetic Biology
  • Biotechnology
  • Biophysics

Background:

  • Cell-free protein synthesis (CFPS) is transitioning from a research tool to a key technology in synthetic biology.
  • Reproducibility challenges between laboratories hinder the widespread adoption of CFPS for applications.
  • Quantitative assessment of variability sources is crucial for standardization.

Purpose of the Study:

  • To conduct the first quantitative assessment of interlaboratory variability in CFPS.
  • To identify and quantify the contributions of site, operator, and reagent preparation to CFPS variability.
  • To establish a baseline for operator variability for future standardization efforts.

Main Methods:

  • Three laboratories implemented a standardized CFPS protocol.
  • Material and personnel exchanges were performed to isolate sources of variability.
  • Coefficient of variation was calculated to quantify interlaboratory and intra-laboratory differences.

Main Results:

  • Interlaboratory variability (40.3% CV) was significantly higher than single-operator variability (7.64% CV).
  • Reagent preparation was a major contributor to variability, while cell extract preparation did not significantly contribute.
  • Both laboratory site and operator identity were significant sources of interlaboratory variability.

Conclusions:

  • Variability in CFPS is substantial and influenced by multiple factors, including site and operator.
  • Standardization of reagent preparation is critical for improving CFPS reproducibility.
  • This study provides a baseline for standardization efforts to accelerate CFPS research and applications.