Chemically-coupled-peptide-promoted virus nanoparticle templated mineralization
Alaa A A Aljabali1, Sachin N Shah, Richard Evans-Gowing
1Department of Biological Chemistry, John Innes Centre, Norwich Research Park, Colney, Norwich, United Kingdom.
Integrative Biology : Quantitative Biosciences From Nano to Macro
|October 30, 2010
Summary
Chemically modifying Cowpea mosaic virus (CPMV) with peptides enables the creation of unique, uniform nanoparticles. This environmentally friendly method avoids genetic engineering and produces novel cobalt-platinum, iron-platinum, or zinc sulfide nanoparticles.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Virology
Background:
- Cowpea mosaic virus (CPMV) possesses a protein surface amenable to chemical modification.
- Templated mineralization offers a route to synthesize inorganic nanoparticles with controlled properties.
- Existing methods for nanoparticle synthesis can be complex or environmentally taxing.
Purpose of the Study:
- To develop a novel, environmentally friendly method for synthesizing monodisperse nanoparticles using a plant virus template.
- To demonstrate the versatility of peptide-CPMV conjugates for directing mineralization.
- To explore an alternative to genetic engineering for virus-based nanoparticle production.
Main Methods:
- Chemical modification of the Cowpea mosaic virus (CPMV) external surface with specific peptides.
- Mineralization of the peptide-CPMV conjugates using metal salts (e.g., cobalt-platinum, iron-platinum) or sulfide precursors.
- Characterization of the resulting nanoparticles for size and composition.
- Application of the methodology to peptide-modified multiwalled carbon nanotubes.
Main Results:
- Production of monodisperse nanoparticles with a diameter of approximately 32 nm.
- Successful synthesis of nanoparticles coated with cobalt-platinum, iron-platinum, and zinc sulfide.
- Demonstration that the method avoids the need for genetic engineering of the virus.
- Confirmation of the general applicability of the method through mineralization of carbon nanotubes.
Conclusions:
- Peptide-directed chemical modification of CPMV provides an efficient and green route to novel nanoparticles.
- This approach offers a viable alternative to genetic modification for virus-templated mineralization.
- The methodology is robust and applicable to other nanomaterials, such as carbon nanotubes.
