Effect of water activity control on the catalytic performance of surfactant - Arthromyces ramosus peroxidase complex in toluene

Noriho Kamiya, Teruyuki Nagamune

研究成果: Contribution to journalArticle査読

3 被引用数 (Scopus)

抄録

Arthromyces ramosus peroxidase (ARP) was successfully modified with a synthetic surfactant for one-electron oxidation reaction of a hydrophobic substrate in toluene. Although UV-visible absorption spectrum of surfactant-ARP complex in toluene showed slight red shift of Soret band compared to that in water, the complex can catalyze oxidation reaction of o-phenylenediamine (o-PDA) with hydrogen peroxide. It appeared that thermodynamic water activity in the reaction system has dominant effect on either the catalytic activity or the stability in the catalytic cycle. Steady-state kinetics under the optimal condition revealed that the specific constant (kcat/Km) of ARP complex for o-PDA was 2 orders of magnitude lower than that in aqueous media, while only 13-fold lower for hydrogen peroxide. The reduction of catalytic activity caused by altering the reaction media from water to toluene was found to be mainly due to the low specific constant of ARP complex for o-PDA rather than hydrogen peroxide.

本文言語英語
ページ(範囲)55-59
ページ数5
ジャーナルBiochemical Engineering Journal
10
1
DOI
出版ステータス出版済み - 2002
外部発表はい

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Bioengineering
  • Biomedical Engineering

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