The structure of the complex between the arsenite oxidase from Pseudorhizobium banfieldiae sp. strain NT-26 and its native electron acceptor cytochrome c.

The arsenite oxidase (AioAB) from Pseudorhizobium banfieldiae sp. strain NT-26 catalyzes the oxidation of arsenite to arsenate and transfers electrons to its cognate electron acceptor cytochrome c (cytc). This activity underpins the ability of this organism to respire using arsenite present in contaminated environments.

Structural and Functional Investigation of the Periplasmic Arsenate-Binding Protein ArrX from .

The anaerobic bacterium respires using the oxyanion arsenate (AsO) as the terminal electron acceptor, where it is reduced to arsenite (AsO) while concomitantly oxidizing various organic (e.g., acetate) electron donors.