NDLI: Microbial arsenite oxidation with oxygen, nitrate, or an electrode as the sole electron acceptor

Content Provider	Springer Nature Link
Author	Nguyen, Van Khanh Tran, Huong T. Park, Younghyun Yu, Jaecheul Lee, Taeho
Copyright Year	2017
Abstract	The purpose of this study was to identify bacteria that can perform As(III) oxidation for environmental bioremediation. Two bacterial strains, named JHS3 and JHW3, which can autotrophically oxidize As(III)–As(V) with oxygen as an electron acceptor, were isolated from soil and water samples collected in the vicinity of an arsenic-contaminated site. According to 16S ribosomal RNA sequence analysis, both strains belong to the ɤ-Proteobacteria class and share 99% sequence identity with previously described strains. JHS3 appears to be a new strain of the Acinetobacter genus, whereas JHW3 is likely to be a novel strain of the Klebsiella genus. Both strains possess the aioA gene encoding an arsenite oxidase and are capable of chemolithoautotrophic growth in the presence of As(III) up to 10 mM as a primary electron donor. Cell growth and As(III) oxidation rate of both strains were significantly enhanced during cultivation under heterotrophic conditions. Under anaerobic conditions, only strain JHW3 oxidized As(III) using nitrate or a solid-state electrode of a bioelectrochemical system as a terminal electron acceptor. Kinetic studies of As(III) oxidation under aerobic condition demonstrated a higher V max and K m from strain JHW3 than strain JHS3. This study indicated the potential application of strain JHW3 for remediation of subsurface environments contaminated with arsenic.
Starting Page	857
Ending Page	868
Page Count	12
File Format	PDF
ISSN	13675435
Journal	Journal of Industrial Microbiology and Biotechnology
Volume Number	44
Issue Number	6
e-ISSN	14765535
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-02-09
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Arsenite Arsenate Electron acceptor Microorganisms Bioremediation Microbiology Biochemistry Inorganic Chemistry Genetic Engineering Biotechnology Bioinformatics
Content Type	Text
Resource Type	Article
Subject	Medicine Bioengineering Applied Microbiology and Biotechnology Biotechnology

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