Molecular protein adaptor with genetically encoded interaction sites guiding the hierarchical assembly of plasmonically active nanoparticle architectures

Andreas Schreiber, Matthias C. Huber, Helmut Cölfen and Stefan M. Schiller ()
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Andreas Schreiber: Freiburg Institute for Advanced Studies (FRIAS), School of Soft Matter Research, University of Freiburg
Matthias C. Huber: Freiburg Institute for Advanced Studies (FRIAS), School of Soft Matter Research, University of Freiburg
Helmut Cölfen: Physical Chemistry, University of Konstanz
Stefan M. Schiller: Freiburg Institute for Advanced Studies (FRIAS), School of Soft Matter Research, University of Freiburg

Nature Communications, 2015, vol. 6, issue 1, 1-11

Abstract: Abstract The control over the defined assembly of nano-objects with nm-precision is important to create systems and materials with enhanced properties, for example, metamaterials. In nature, the precise assembly of inorganic nano-objects with unique features, for example, magnetosomes, is accomplished by efficient and reliable recognition schemes involving protein effectors. Here we present a molecular approach using protein-based ‘adaptors/connectors’ with genetically encoded interaction sites to guide the assembly and functionality of different plasmonically active gold nanoparticle architectures (AuNP). The interaction of the defined geometricaly shaped protein adaptors with the AuNP induces the self-assembly of nanoarchitectures ranging from AuNP encapsulation to one-dimensional chain-like structures, complex networks and stars. Synthetic biology and bionanotechnology are applied to co-translationally encode unnatural amino acids as additional site-specific modification sites to generate functionalized biohybrid nanoarchitectures. This protein adaptor-based nano-object assembly approach might be expanded to other inorganic nano-objects creating biohybrid materials with unique electronic, photonic, plasmonic and magnetic properties.

Date: 2015
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DOI: 10.1038/ncomms7705

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