Potato Virus M-Like Nanoparticles: Construction and Characterization

Area of Science:

• Biotechnology
• Nanotechnology
• Virology

Background:

• Virus-like particles (VLPs) mimic native viruses for biotechnological applications.
• Potato virus M (PVM) coat protein (CP) self-assembles into filamentous structures.
• Developing novel VLP-based carriers is crucial for advanced nanomaterials.

Purpose of the Study:

• To engineer a filamentous VLP carrier from PVM CP.
• To evaluate the capacity and stability of PVM-derived VLPs for displaying foreign sequences.
• To demonstrate the functional display of foreign peptides on the PVM VLP surface.

Main Methods:

• Amplification and cloning of PVM CP gene from infected potato plants.
• Expression of PVM CP in Escherichia coli and self-assembly induction.
• Electron microscopy for structural analysis and peptide fusion characterization.
• Stability assays under various conditions (pH, salt, EDTA, reducing agents).

Main Results:

• PVM CP self-assembled into filamentous particles (100-300 nm length).
• N-terminal fusions (peptide, protein A Z-domain) maintained VLP formation.
• PVM VLPs accommodate up to 78 amino acids on their surface.
• Particles exhibited stability under physiological and harsh conditions.
• Functional display of Z-domain demonstrated by specific antibody binding.

Conclusions:

• PVM-derived VLPs serve as a robust and versatile carrier system.
• The PVM VLP platform is suitable for producing functional nanomaterials.
• This VLP system holds potential for diverse biotechnological applications.