AI Article Synopsis
- Trivalent arsenic ions boost the catalase activity in Pseudomonas putida 18, which is linked to the rate of arsenic oxidation.
- When arsenic oxidation ceases, catalase activity drops.
- This process suggests that the oxidation of trivalent arsenic serves as a detoxification mechanism, utilizing the production and breakdown of hydrogen peroxide (H2O2).
Article Abstract
Trivalent arsenic ions added to the medium stimulated the catalase activity of a Pseudomonas putida 18 culture correlating with the rate of arsenic oxidation. As soon as the process of arsenic oxidation stopped, the activity of catalase decreased. Apparently, the production of H2O2, its decomposition by catalase and oxidation of As(III) to As(V) by the formed oxygen are a device for detoxication of trivalent arsenic acquired by the cell in the course of evolution. Therefore, oxidation of trivalent arsenic by the culture involves the peroxide mechanism.
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