Type III Secretion Filaments as Templates for Metallic Nanostructure Synthesis

Nanostructured materials can be interfaced with living cells to enable unique chemical and biological outcomes. However, it is challenging to precisely control the shape and chemical composition of submillimeter sized, cell-associated materials. In this protocol, we describe how to genetically modif...

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Bibliographic Details
Published inMethods in molecular biology (Clifton, N.J.) Vol. 1798; p. 155
Main Authors Glasgow, Anum Azam, Tullman-Ercek, Danielle
Format Journal Article
LanguageEnglish
Published United States 01.01.2018
Subjects
Microbial electrocatalysis
Biomineralization
Protein secretion
Self-assembly
Nanowires
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Summary:Nanostructured materials can be interfaced with living cells to enable unique chemical and biological outcomes. However, it is challenging to precisely control the shape and chemical composition of submillimeter sized, cell-associated materials. In this protocol, we describe how to genetically modify and isolate a self-assembling filament protein from Salmonella enterica, PrgI, to bind Au nanoparticles. Au-conjugated filaments can be chemically reduced in vitro to form contiguous wires and networks that are several micrometers in length. We also describe a strategy to assemble PrgI-based filaments on live cells, which can then be sheared or remain tethered to cells for gold conjugation. These methods form the basis of a strategy for interactions between inorganic and organic systems, and could be expanded to introduce interactions with other metal nanoparticles for which peptide binding partners are known.
ISSN:1940-6029
DOI:10.1007/978-1-4939-7893-9_12