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Actinosomes: Condensate-Templated Containers for Engineering Synthetic Cells.

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  • 1Laboratory of Physical Chemistry and Soft Matter, Wageningen University and Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands.

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Researchers developed actinosomes, cell-sized porous containers, using biomolecular condensates and actin cytoskeleton. This innovation enables efficient synthetic cell construction for various biotechnological applications.

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Synthetic cellsactin cytoskeletonbiomolecular condensatescell-free expressionliquid-liquid phase separation

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Area of Science:

  • Synthetic biology
  • Biomaterials science
  • Cellular engineering

Background:

  • Engineering synthetic cells requires robust 3D containers for biochemical reactions.
  • Current methods for creating synthetic cell components can be complex.

Purpose of the Study:

  • To develop an easy and effective technique for creating cell-sized porous containers (actinosomes).
  • To explore the potential of actinosomes in synthetic cell platforms and biotechnological applications.

Main Methods:

  • Utilizing interactions between biomolecular condensates and the actin cytoskeleton.
  • Localizing actin monomers on polypeptide/nucleoside triphosphate condensates.
  • Triggering actin polymerization and using osmotic gradients to form containers.
  • Investigating the role of guanosine triphosphate (GTP)-to-adenosine triphosphate (ATP) ratio in formation.

Main Results:

  • Successfully created cell-sized porous containers (actinosomes) with actin filament and polylysine polymer boundaries.
  • Demonstrated the crucial role of the GTP/ATP ratio in successful actinosome formation.
  • Confirmed the porous nature of actinosomes, allowing selective molecule passage.
  • Showcased actinosome functionality as bioreactors for in vitro protein translation.

Conclusions:

  • Actinosomes offer a simple and effective addition to the synthetic cell platform.
  • Their inherent encapsulation capacity and potential for active surfaces are valuable for future applications.
  • Actinosomes can be utilized for signaling cascades and multicellular assembly in biotechnology.