Phage display selected magnetite interacting Adhirons for shape controlled nanoparticle synthesis
| Autor: | Lori A. Somner, Michael J. McPherson, Andrea E. Rawlings, Amy E. Monnington, Jonathan P. Bramble, Sarah S. Staniland, Anna A Tang, Darren C. Tomlinson, David J. Cooke |
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| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
0303 health sciences Phage display technology industry and agriculture Nanoparticle Nanotechnology 02 engineering and technology General Chemistry Q1 021001 nanoscience & nanotechnology Nanomaterials Amino acid Chemistry 03 medical and health sciences chemistry.chemical_compound Molecular dynamics Adsorption Molecular recognition chemistry Chemical engineering hemic and lymphatic diseases QD 0210 nano-technology 030304 developmental biology Magnetite |
| Zdroj: | Chemical Science |
| ISSN: | 2041-6539 2041-6520 |
| Popis: | Biopanning was used to generate novel artificial binding proteins which are able to control the formation of synthetic cubic nanoparticles of magnetite. Adhirons are robust, well expressing, peptide display scaffold proteins, developed as an effective alternative to traditional antibody binding proteins for highly specific molecular recognition applications. This paper reports for the first time the use of these versatile proteins for material binding, and as tools for controlling material synthesis on the nanoscale. A phage library of Adhirons, each displaying two variable binding loops, was screened to identify specific proteins able to interact with [100] faces of cubic magnetite nanoparticles. The selected variable regions display a strong preference for basic residues such as lysine. Molecular dynamics simulations of amino acid adsorption onto a [100] magnetite surface provides a rationale for these interactions, with the lowest adsorption energy observed with lysine. These proteins direct the shape of the forming nanoparticles towards a cubic morphology in room temperature magnetite precipitation reactions, in stark contrast to the high temperature, harsh reaction conditions currently used to produce cubic nanoparticles. These effects demonstrate the utility of the selected Adhirons as novel magnetite mineralization control agents using ambient aqueous conditions. The approach we outline with artificial protein scaffolds has the potential to develop into a toolkit of novel additives for wider nanomaterial fabrication. |
| Databáze: | OpenAIRE |
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