A new chemolithoautotrophic arsenite-oxidizing bacterium isolated from a gold mine: Phylogenetic, physiological, and preliminary biochemical studies

Santini, J. M., Sly, L. I., Schnagl, R. D. and Macy, J. M. (2000) A new chemolithoautotrophic arsenite-oxidizing bacterium isolated from a gold mine: Phylogenetic, physiological, and preliminary biochemical studies. Applied and Environmental Microbiology, 66 1: 92-97.

Author Santini, J. M.
Sly, L. I.
Schnagl, R. D.
Macy, J. M.
Title A new chemolithoautotrophic arsenite-oxidizing bacterium isolated from a gold mine: Phylogenetic, physiological, and preliminary biochemical studies
Journal name Applied and Environmental Microbiology   Check publisher's open access policy
ISSN 0099-2240
Publication date 2000
Sub-type Article (original research)
Volume 66
Issue 1
Start page 92
End page 97
Total pages 6
Place of publication Washington, DC
Publisher American Society for Microbiology
Collection year 2000
Language eng
Subject C1
270300 Microbiology
780105 Biological sciences
Abstract A previously unknown chemolithoautotrophic arsenite-oxidizing bacterium has been isolated from a gold mine in the Northern Territory of Australia. The organism, designated NT-26, was found to be a gram-negative motile rod with two subterminal flagella. In a minimal medium containing only arsenite as the electron donor (5 mM), oxygen as the electron acceptor, and carbon dioxide-bicarbonate as the carbon source, the doubling time for chemolithoautotrophic growth was 7.6 h. Arsenite oxidation was found to be catalyzed by a periplasmic arsenite oxidase (optimum pH, 5.5). Based upon 16S rDNA phylogenetic sequence analysis, NT-26 belongs to the Agrobacterium/Rhizbium branch of the alpha-Proteobacteria and may represent a new species. This recently discovered organism is the most rapidly growing chemolithoautotrophic arsenite oxidizer known.
Keyword Biotechnology & Applied Microbiology
Microbiology
Chrysiogenes-arsenatis
Purification
Oxidase
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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Created: Mon, 13 Aug 2007, 11:32:01 EST