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Respiratory arsenate reductase as a bidirectional enzyme

Dates

Year
2009

Citation

Richey, Christine, Chovanec, Peter, Hoeft, Shelley E, Oremland, Ronald S, Basu, Partha, and Stolz, John F, 2009, Respiratory arsenate reductase as a bidirectional enzyme: Biochemical and Biophysical Research Communications, v. 382, iss. 2, p. 298-302.

Summary

The haloalkaliphilic bacterium Alkalilimnicola ehrlichii is capable of anaerobic chemolithoautotrophic growth by coupling the oxidation of arsenite (As(III)) to the reduction of nitrate and carbon dioxide. Analysis of its complete genome indicates that it lacks a conventional arsenite oxidase (Aox), but instead possesses two operons that each encode a putative respiratory arsenate reductase (Arr). Here we show that one homolog is expressed under chemolithoautotrophic conditions and exhibits both arsenite oxidase and arsenate reductase activity. We also demonstrate that Arr from two arsenate respiring bacteria, Alkaliphilus oremlandii and Shewanella sp. strain ANA-3, is also biochemically reversible. Thus Arr can function as a reductase [...]

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Communities

  • USGS National Research Program

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Provenance

Added to ScienceBase on Fri Apr 19 10:35:40 MDT 2013 by processing file <b>Microbial Biogeochemistry of Aquatic Environments.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/504216b7e4b04b508bfd3347">https://www.sciencebase.gov/catalog/item/504216b7e4b04b508bfd3347</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.1016/j.bbrc.2009.03.045

Citation Extension

citationTypeJournal Article
journalBiochemical and Biophysical Research Communications
parts
typePages
value298-302
typeVolume
value382
typeIssue
value2

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