A Modular Method for Rapidly Prototyping Targeted Gas Vesicle Protein Nanoparticles.

Area of Science:

• Biotechnology
• Nanotechnology
• Protein Engineering

Background:

• Gas vesicles (GVs) are protein-based nanoparticles with potential in biomedical applications.
• Current methods for modifying GVs lack modularity and orientation control.
• Targeted delivery of nanoparticles requires precise surface functionalization.

Purpose of the Study:

• To develop a modular and orientation-specific method for functionalizing GVs.
• To create targeted GVs for potential biomedical applications.
• To demonstrate the utility of functionalized GVs for specific molecular targeting.

Main Methods:

• Functionalization of GVs with nickel-nitrilotriacetic acid (Ni-NTA) groups.
• Binding of His-tagged antibody fragments to functionalized GVs in an orientation-specific manner.
• Characterization of particle size, surface charge, and binding affinity of functionalized GVs.

Main Results:

• Successfully functionalized GVs demonstrated specific binding to His-tagged proteins.
• Particle size and surface charge of functionalized GVs were characterized.
• Targeted GVs demonstrated successful binding to prostate-specific membrane antigen (PSMA) in vitro.

Conclusions:

• A modular and orientation-specific method for creating targeted GVs was established.
• This method allows for precise control over the display of targeting moieties on GVs.
• The developed targeted GVs show promise for specific delivery in biomedical applications.