Statistical Copolymers that Mimic Aspects of Mussel Adhesive Proteins: Access to Robust Adhesive‐Domains for Non‐Covalent Surface PEGylation

Author:

Peplau Stefan1,Neubert Tilmann J.12ORCID,Balasubramanian Kannan2ORCID,Polleux Julien3,Börner Hans G.1ORCID

Affiliation:

1. Department of Chemistry Laboratory for Organic Synthesis of Functional Systems Humboldt‐Universität zu Berlin Brook‐Taylor‐Str. 2 12489 Berlin Germany

2. Department of Chemistry Micro & Nano Analytical Sciences School of Analytical Sciences Adlershof (SALSA) and IRIS Adlershof Humboldt‐Universität zu Berlin Albert‐Einstein‐Str. 5–9 12489 Berlin Germany

3. Research & Innovation Unit Department of Ophthalmic Optics Health University of Applied Sciences Tyrol Innrain 98 Innsbruck 6020 Austria

Abstract

AbstractReconstructing functional sequence motifs of proteins, using statistical copolymers greatly reduces the information content, but simplifies synthesis significantly. Key amino acid residues involved in the adhesion of mussel foot proteins are identified. The side‐chain functionalities of Dopa, lysine, and arginine are abstracted and incorporated into acrylate monomers to allow controlled radical polymerization. The resulting Dopa‐acrylate (Y*‐acr), arginine‐acrylate (R‐acr), and lysine‐acrylate (K‐acr) monomers are polymerized in different monomer ratios and compositions by reversible addition fragmentation transfer polymerization with a poly(ethylene glycol) (PEG) macrochain transfer agent. This results in two sets of PEG‐block‐copolymers with statistical mixtures and different monomer ratios of catechol/primary amine and catechol/guanidine side‐chain functionalities, both important pairs for mimicking π‐cation interactions. The coating behavior of these PEG‐block‐copolymers is evaluated using quartz crystal microbalance with dissipation energy monitoring (QCM‐D), leading to non‐covalent PEGylation of the substrates with clear compositional optima in the coating stability and antifouling properties. The coatings prevent non‐reversible albumin or serum adsorption, as well as reduce cellular adhesion and fungal spore attachment.

Funder

Deutsche Forschungsgemeinschaft

Tiroler Wissenschaftsförderung

Publisher

Wiley

Subject

Materials Chemistry,Polymers and Plastics,Organic Chemistry

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