Design of a specific peptide tag that affords covalent and site-specific enzyme immobilization catalyzed by microbial transglutaminase

Jo Tominaga, Noriho Kamiya, Satoshi Doi, Hirofumi Ichinose, Tatsuo Maruyama, Masahiro Goto

研究成果: Contribution to journalArticle査読

42 被引用数 (Scopus)

抄録

Transglutaminase-mediated site-specific and covalent immobilization of an enzyme to chemically modified agarose was explored. Using Escherichia coli alkaline phosphatase (AP) as a model, two designed specific peptide tags containing a reactive lysine (Lys) residue with different length Gly-Ser linkers for microbial transglutaminase (MTG) were genetically attached to N- or C-termini. For solid support, agarose gel beads were chemically modified with β-casein to display reactive glutamine (Gln) residues on the support surface. Recombinant APs were enzymatically and covalently immobilized to casein-grafted agarose beads. Immobilization by MTG markedly depended on either the position of the length of the peptide tags incorporated to AP, suggesting steric constraint upon enzymatic immobilization. Enzymatically immobilized AP showed comparable catalytic turnover (kcat) to the soluble counterpart and comparable operational stability with chemically immobilized AP. These results indicate that attachment of a suitable specific peptide tag to the right position of a target protein is crucial for MTG-mediated formulation of highly active immobilized proteins.

本文言語英語
ページ(範囲)2299-2304
ページ数6
ジャーナルBiomacromolecules
6
4
DOI
出版ステータス出版済み - 7 2005

All Science Journal Classification (ASJC) codes

  • バイオエンジニアリング
  • 生体材料
  • ポリマーおよびプラスチック
  • 材料化学

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