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Colony-like Protocell Superstructures.

Chinmay Katke1,2, Esteban Pedrueza-Villalmanzo3,4, Karolina Spustova5

  • 1Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States.

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Summary
This summary is machine-generated.

Model protocell colonies formed on surfaces, offering enhanced mechanical stability and DNA encapsulation. These superstructures exhibit dynamic growth, disassembly, and migration, supporting the "lipid world hypothesis" for early life.

Keywords:
colonycompartmentalizationlipidorigin of lifeprotocellsuperstructurevan der Waals

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Area of Science:

  • Origin of life studies
  • Biophysics
  • Materials science

Background:

  • Protocells are key to understanding the origin of life.
  • Previous models often focused on isolated protocells.

Purpose of the Study:

  • Investigate the formation and behavior of protocell superstructures on solid surfaces.
  • Explore the mechanical stability and functional capabilities of these model colonies.
  • Develop a theoretical framework to explain superstructure formation.

Main Methods:

  • Spontaneous shape transformation of lipid agglomerates on aluminum thin films.
  • Observation of collective protocell structures and their dynamics.
  • Encapsulation and reaction studies with DNA.
  • Development of a continuum elastohydrodynamic theory.

Main Results:

  • Model protocell colonies formed, showing increased mechanical stability over individual protocells.
  • These superstructures encapsulated DNA and supported nonenzymatic strand displacement reactions.
  • Protocell colonies exhibited dynamic behaviors including disassembly, migration via nanotethers, and formation of "exocompartments".
  • A theoretical model identified van der Waals interactions and membrane bending as critical factors in subcompartment formation.

Conclusions:

  • Protocell superstructures on surfaces offer advantages in mechanical stability and compartmentalization.
  • Dynamic behaviors like migration and exocompartment formation suggest complex protocell interactions.
  • Findings support the hypothesis that early protocells may have existed as colonies, extending the 'lipid world hypothesis'.