Membrane-confined liquid-liquid phase separation toward artificial organelles

Area of Science:

• Synthetic biology
• Origin of life studies
• Biomimetic chemistry

Background:

• Cells are complex microreactors with crowded environments.
• Understanding cell origins drives the creation of synthetic analogs.
• Artificial organelles are key to mimicking cellular complexity.

Purpose of the Study:

• To construct hierarchical protocells by integrating coacervate microdroplets into proteinosomes.
• To develop a more realistic model for cellular organization and function.
• To explore signal processing and computation within synthetic cells.

Main Methods:

• Integration of membraneless coacervate microdroplets into proteinosomes.
• Design of protocell subcompartments capable of sensing and responding to stimuli.
• Implementation of biochemical inputs to create Boolean logic gates (NOR and NAND).

Main Results:

• Hierarchical protocells exhibiting sensing, action, and adaptation capabilities were successfully built.
• Enrichment of biomolecular reactants within protocell organelles accelerated enzymatic reactions.
• Demonstrated signal processing within protocells enabled the design of biochemical logic gates.

Conclusions:

• The developed tiered protocells offer a realistic model for cellular organization.
• This synthetic platform facilitates the study of complex metabolic networks and chemical computation.
• Highlights potential for protocell-community signaling and advanced synthetic biology applications.