Protocells Featuring Membrane-Bound and Dynamic Membraneless Organelles

Area of Science:

• Cell biology
• Synthetic biology
• Biochemistry

Background:

• Eukaryotic cells utilize multicompartmentalization with membrane-bound and membraneless organelles to regulate cellular processes.
• Current synthetic cell models often isolate these organelle types, limiting the study of their synergistic functions.
• Understanding organelle collaboration is crucial for advancing cell regulation insights.

Purpose of the Study:

• To develop a synthetic cell model that co-encapsulates synthetic membrane-bound and membraneless organelles.
• To mimic the natural cellular organization for studying inter-organelle interactions.
• To provide a platform for comprehensive analysis of cellular dynamics.

Main Methods:

• Utilized microfluidics to produce liposomes encapsulating synthetic organelles.
• Constructed synthetic membrane-bound organelles using self-assembled poly(ethylene glycol)-block-poly(trimethylene carbonate) nanovesicles.
• Formed synthetic membraneless organelles via temperature-sensitive elastin-like polypeptide phase separation.

Main Results:

• Successfully created a synthetic cell architecture that integrates both types of synthetic organelles within liposomes.
• Demonstrated a biomimetic model that allows for the co-localization and potential interaction of distinct organelle types.
• Established a foundation for investigating the collaborative roles of different organelle types in cellular functions.

Conclusions:

• The proposed synthetic cell design effectively recapitulates natural cellular compartmentalization.
• This model offers a powerful tool for dissecting the interplay between membrane-bound and membraneless organelles.
• Facilitates a deeper understanding of cellular regulation and dynamics through integrated organelle studies.