An engineered dimeric protein pore that spans adjacent lipid bilayers.

Area of Science:

• Synthetic biology
• Biotechnology
• Biophysics

Background:

• Artificial tissue construction requires inter-compartmental communication.
• Current methods lack efficient ways to connect engineered tissue compartments.

Purpose of the Study:

• To develop a novel molecular construct for enabling communication between aqueous compartments.
• To address the challenge of inter-compartmental communication in synthetic biology and artificial tissue engineering.

Main Methods:

• Covalent linkage of two heptameric staphylococcal α-hemolysin pores in a cap-to-cap orientation to form a dimer, (α7)2.
• Confirmation of dimer structure using biochemical analysis, transmission electron microscopy (TEM), and single-channel electrical recording.
• Demonstration of pore insertion into lipid bilayers (small unilamellar vesicles and planar bilayers).

Main Results:

• Successfully created and characterized a dimeric transmembrane pore, (α7)2.
• The (α7)2 pore spans two adjacent lipid bilayers, creating a conduit between aqueous compartments.
• Confirmed pore structure and function through multiple biophysical techniques, including TEM and electrical recording.

Conclusions:

• The engineered dimeric pore provides a novel mechanism for inter-compartmental communication in artificial systems.
• This work advances synthetic biology by offering a tool for building more complex and functional engineered tissues.
• The ability to bridge lipid bilayers opens new avenues for designing communication pathways in biomimetic systems.