Phospholipid synthesis inside phospholipid membrane vesicles

Area of Science:

• Bioengineering
• Synthetic Biology
• Biochemistry

Background:

• Reconstructing cell membrane growth is essential for artificial cell proliferation but hindered by inefficient phospholipid synthesis.
• Existing methods lack high-yielding phospholipid synthesis systems, limiting progress in bioengineering artificial cells.

Purpose of the Study:

• To develop a novel cell-free phospholipid synthesis system to overcome limitations in artificial cell construction.
• To enable sustainable membrane growth for self-reproducing artificial cells.

Main Methods:

• Integrated fatty acid synthesis with a cell-free gene expression system to produce acyltransferases.
• Utilized synthesized acyltransferases to convert fatty acids into phosphatidic acids within a single reaction mixture.
• Performed phospholipid synthesis within encapsulated phospholipid membrane vesicles.

Main Results:

• Achieved sub-millimolar phospholipid synthesis by avoiding intermediate accumulation, enhancing lipid synthesis efficiency.
• Demonstrated successful phospholipid synthesis and localization onto existing vesicle membranes.
• Established a system for sustainable membrane growth in artificial cell constructs.

Conclusions:

• The developed cell-free system provides a high-yielding method for phospholipid synthesis.
• This approach facilitates the construction of self-reproducing artificial cells by enabling sustainable membrane growth.
• Offers a foundational platform for advancing the field of artificial cell bioengineering.