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Updated: Nov 26, 2025

Author Spotlight: Optimizing CFPS Systems for Synthetic Cell Construction
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Physical stimuli-responsive cell-free protein synthesis.

Junzhu Yang1, Yuan Lu1

  • 1Key Laboratory of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering, Tsinghua University, Beijing, China.

Synthetic and Systems Biotechnology
|December 9, 2020
PubMed
Summary

Physical signals offer precise, non-toxic control for cell-free protein synthesis. This review explores light, temperature, electric, and magnetic fields to enhance synthetic biology applications.

Keywords:
CFPS, Cell-free Protein SynthesisCell-free systemDEP, DielectrophoresisDMF, Digital MicrofluidicPhysical stimuliRNATs, RNA thermometersS-DM-Azo, 2,6-dimethyl-4-(methylthio) zobenzene-4′-carobxylic acidSpatiotemporal controlSynthetic biologyTCSs, Two-component Systems

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Area of Science:

  • Synthetic biology
  • Biotechnology
  • Molecular biology

Background:

  • Cell-free protein synthesis (CFPS) offers advantages over cell-based systems by enabling *in vitro* control.
  • Traditional chemical control methods in CFPS lack accuracy and can be toxic.
  • Physical signals present an ideal alternative for precise and minimally invasive control.

Purpose of the Study:

  • To review methods utilizing physical signals for gene expression control in cell-free systems.
  • To highlight the advantages of physical control over chemical methods.
  • To discuss future applications and challenges in physical signal-mediated CFPS.

Main Methods:

  • Review of existing literature on physical signal applications in CFPS.
  • Categorization of physical control methods by signal type: light, temperature, electric fields, and magnetic forces.
  • Analysis of signal transmission and source challenges.

Main Results:

  • Physical signals (light, temperature, electric, magnetic fields) enable accurate spatiotemporal control of gene expression in CFPS.
  • These physical methods offer enhanced flexibility and controllability compared to chemical inducers.
  • Integration of physical signals expands the potential applications of CFPS.

Conclusions:

  • Physical signals are a superior approach for controlling cell-free protein synthesis.
  • Further research is needed to address signal source and transmission challenges.
  • Optimized physical control will drive advancements in pharmaceutical and industrial production.