Preparation of sticky Escherichia coli through surface display of an adhesive catecholamine moiety

Applied and Environmental Microbiology
Joseph P ParkHaeshin Lee

Abstract

Mussels attach to virtually all types of inorganic and organic surfaces in aqueous environments, and catecholamines composed of 3,4-dihydroxy-l-phenylalanine (DOPA), lysine, and histidine in mussel adhesive proteins play a key role in the robust adhesion. DOPA is an unusual catecholic amino acid, and its side chain is called catechol. In this study, we displayed the adhesive moiety of DOPA-histidine on Escherichia coli surfaces using outer membrane protein W as an anchoring motif for the first time. Localization of catecholamines on the cell surface was confirmed by Western blot and immunofluorescence microscopy. Furthermore, cell-to-cell cohesion (i.e., cellular aggregation) induced by the displayed catecholamine and synthesis of gold nanoparticles on the cell surface support functional display of adhesive catecholamines. The engineered E. coli exhibited significant adhesion onto various material surfaces, including silica and glass microparticles, gold, titanium, silicon, poly(ethylene terephthalate), poly(urethane), and poly(dimethylsiloxane). The uniqueness of this approach utilizing the engineered sticky E. coli is that no chemistry for cell attachment are necessary, and the ability of spontaneous E. coli attachment allows...Continue Reading

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Related Concepts

OmpW protein, E coli
Bacterial Adhesion
Outer Membrane Lipoproteins, Bacterial
Catecholamines
Alkalescens-Dispar Group
Immunofluorescence Microscopy
Surface Properties
Western Blot
Escherichia coli Proteins
Metabolic Engineering

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