Enzymatic preparation of streptavidin-immobilized hydrogel using a phenolated linear poly(ethylene glycol)

Kousuke Moriyama, Kosuke Minamihata, Rie Wakabayashi, Masahiro Goto, Noriho Kamiya

研究成果: ジャーナルへの寄稿学術誌査読

12 被引用数 (Scopus)


Hybrid gels constructed from proteins and polymers have attracted a wide range of attention in the field of biomedicine and bioengineering. We report herein the enzymatic preparation of polymer-protein hybrid hydrogels composed of terminally bis-functionalized linear poly(ethylene glycol) (PEG) and streptavidin (SA). PEG was conjugated with tyramine to introduce terminal phenolic hydroxyl (Ph-OH) groups. A peptide tag containing a tyrosine residue (G4Y-tag) was genetically introduced at the C-terminus of SA. The Ph-OH-modified PEG and G4Y-tagged SA (SA-G4Y) were treated by horseradish peroxidase (HRP) in the presence of hydrogen peroxide (H2O2) to yield (PEG-Ph-OH)-(SA-G4Y) hybrid gels. Biotinylated enhanced green fluorescent protein (biotin-EGFP) was selectively captured in the obtained hybrid gels, indicating that SA-G4Y retained its biological function. The amount of biotin-EGFP immobilized in the hybrid gels depended on the concentration of SA-G4Y. In addition, biotinylated bacterial alkaline phosphatase (biotin-BAP) was immobilized in the hybrid gel. The immobilized biotin-BAP exhibited more than 95% of the initial activity after 5 rounds of recycling. The results suggest the facile functionalization of the hybrid gel with a variety of biotinylated functional molecules.

ジャーナルBiochemical Engineering Journal
出版ステータス出版済み - 7月 5 2013

!!!All Science Journal Classification (ASJC) codes

  • バイオテクノロジー
  • 環境工学
  • バイオエンジニアリング
  • 生体医工学


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