Molecular crowding elicits the acceleration of enzymatic crosslinking of macromolecular substrates

Ryo Sato, 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

3 被引用数 (Scopus)

抄録

Cytoplasm contains high concentrations of biomacromolecules. Protein behavior under such crowded conditions is reportedly different from that in an aqueous buffer solution, mainly owing to the effect of volume exclusion caused by the presence of macromolecules. Using a crosslinking reaction catalyzed by microbial transglutaminase (MTG) as a model, we herein systematically determined how the substrate size affects enzymatic activity in both dilute and crowded solutions of dextran. We first observed a threefold reduction in MTG-mediated crosslinking of a pair of small peptide substrates in 15 wt% dextran solution. In contrast, when proteinaceous substrates were involved, the crosslinking rates in 15 wt% dextran solutions accelerated markedly to levels comparable with the level in the absence of dextran. Our results provide new insights into the action of enzymes with regard to macromolecular substrates under crowded conditions, of which the potential utility was demonstrated by the formation of highly crosslinked protein polymers.

本文言語英語
ページ(範囲)306-314
ページ数9
ジャーナルOrganic and Biomolecular Chemistry
21
2
DOI
出版ステータス出版済み - 11月 1 2022

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 物理化学および理論化学
  • 有機化学

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