Inhibitory Effect of High Concentrations of Ferric Ions on the Activity of Acidithiobacillus ferrooxidans

Yoshishige Kawabe, Chihiro Inoue, Koichi Suto, Tadashi Chida

研究成果: Article査読

33 被引用数 (Scopus)

抄録

The influence of high concentrations of ferric ions on the biochemical activity of Acidithiobacillus ferrooxidans was studied using intact cells. The specific oxidation rate of ferrous ions decreased with increasing ferric ion concentration. Lineweaver-Burk plots revealed typical competitive inhibition kinetics, because the slopes varied with the ferric ion concentration. A linear relationship between the slope and the square of the ferric ion concentration revealed that the iron-oxidizing enzyme system of A. ferrooxidans was competitively inhibited by about two molecules of ferric ion. The kinetic equation based on this inhibition model agreed with the experimental observation at a high ferric ion concentration where the bacterium is usually exposed in bioleaching and biooxidation plants.

本文言語English
ページ(範囲)375-379
ページ数5
ジャーナルJournal of Bioscience and Bioengineering
96
4
DOI
出版ステータスPublished - 2003

ASJC Scopus subject areas

  • バイオテクノロジー
  • バイオエンジニアリング
  • 応用微生物学とバイオテクノロジー

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