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Light-triggered enzymatic reactions in nested vesicle reactors.

James W Hindley1,2, Yuval Elani1,2, Catriona M McGilvery3

  • 1Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.

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|March 17, 2018
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Summary
This summary is machine-generated.

Nested vesicles respond to UV light by forming pores, enabling controlled enzymatic reactions. This light-activated system offers precise control over biochemical processes within artificial cell compartments.

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Area of Science:

  • Biotechnology and Synthetic Biology
  • Materials Science
  • Biochemistry

Background:

  • Cell-sized vesicles are promising for micro-scale reactions and as building blocks for artificial cells.
  • Incorporating light-responsive elements enhances vesicle functionality, enabling spatiotemporal control of internal processes.
  • Current limitations exist in precisely controlling reactions within these miniaturized systems.

Purpose of the Study:

  • To develop a light-responsive nested vesicle system for controlled enzymatic reactions.
  • To utilize ultraviolet (UV) irradiation for triggering pore formation and initiating biochemical processes.
  • To demonstrate the potential of these structures in synthetic biology and microreactor applications.

Main Methods:

  • Construction of nested vesicle architectures.
  • Incorporation of diacetylene within inner vesicle compartments as a phototransducer.
  • Induction of pore formation via UV irradiation, triggering diacetylene polymerization.
  • Monitoring of enzymatic reactions (β-galactosidase hydrolysis) in the external compartment.

Main Results:

  • UV irradiation successfully induced diacetylene polymerization and pore formation in the inner vesicles.
  • Controlled release and hydrolysis of a fluorogenic substrate in the external compartment were achieved.
  • The rate of enzymatic reaction was modulated by adjusting UV exposure time, demonstrating spatiotemporal control.

Conclusions:

  • The developed nested vesicle system functions as a light-activated microreactor.
  • This platform offers precise spatiotemporal control over enzymatic reactions initiated by UV light.
  • Potential applications include biocatalysis, drug delivery, and the development of advanced artificial cell systems.