Biological specific recognition of glycopolymer- modified interfaces by RAFT living radical polymerization

Masayuki Toyoshima, Tomoyuki Oura, Tomohiro Fukuda, Erino Matsumoto, Yoshiko Miura

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Glycopolymers with α-galactose (α-Gal) and α-mannose (α-Man) were synthesized by means of living radical polymerization with a reversible addition-fragment chain transfer reagent, and the thin-layer formation of glycopolymers was investigated in terms of protein recognition abilities. Thiol-terminated glycopolymers formed a thin layer of about 2.5 nm in thickness on a gold substrate, and the glycopolymer thin layer showed specific interaction with sugar recognition proteins (lectins and Shiga toxins (Stxs)). The interactions were highly specific, and the signal-to-noise ratio of protein recognition was greater than 16. Glycopolymer-substituted gold nanoparticles (GNPs) also showed biorecognition abilities and protein-specific aggregation. The protein recognition abilities of the GNPs were also analyzed. The glycopolymer-substituted GNPs were utilized for signal amplification of surface plasmon resonance (SPR) to detect protein-saccharide recognition. The glycopolymer with α-Gal showed a strong interaction with Stxs according to SPR measurements, suggesting a possible application of α-Gal-substituted GNPs in Stx-1 biosensing.

Original languageEnglish
Pages (from-to)172-178
Number of pages7
JournalPolymer Journal
Volume42
Issue number2
DOIs
Publication statusPublished - Feb 1 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

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