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Title: Genes for Uranium Bioremediation in the Anaerobic Sulfate-Reducing Bacteria: Desulfovibrio mutants with altered sensitivity to oxidative stress

Abstract

Sulfate-reducing bacteria of the genus Desulfovibrio are ubiquitous in anaerobic environments such as groundwater, sediments, and the gastrointestinal tract of animals. Because of the ability of Desulfovibrio to reduce radionuclides and metals through both enzymatic and chemical means, they have been proposed as a means to bioremediate heavy metal contaminated sites. Although classically thought of as strict anaerobes, Desulfovibrio species are surprisingly aerotolerant. Our objective is to understand the response of Desulfovibrio to oxidative stress so that we may more effectively utilize them in bioremediation of heavy metals in mixed aerobic-anaerobic environments. The enzymes superoxide dismutase, superoxide reductase, catalase, and rubrerythrin have been shown by others to be involved in the detoxification of reactive oxygen species in Desulfovibrio. Some members of the genus Desulfovibrio can even reduce molecular oxygen to water via a membrane bound electron transport chain with the concomitant production of ATP, although their ability to grow with oxygen as the sole electron acceptor is still questioned.

Authors:
; ;
Publication Date:
Research Org.:
University of Missouri-Columbia, Columbia, MO
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
894936
Report Number(s):
CONF-ERSP2006-67
TRN: US0700345
Resource Type:
Conference
Resource Relation:
Conference: Annual Environmental Remediation Sciences Program PI Meeting, April 3-5, 2006, Warrenton, VA
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; ANIMALS; BINDING ENERGY; BIOREMEDIATION; CATALASE; DESULFOVIBRIO; DETOXIFICATION; ELECTRONS; ENZYMES; GASTROINTESTINAL TRACT; GENES; MEMBRANES; MUTANTS; OXYGEN; RADIOISOTOPES; SEDIMENTS; SENSITIVITY; SULFATE-REDUCING BACTERIA; SUPEROXIDE DISMUTASE; URANIUM; VALENCE

Citation Formats

Payne, Rayford B, Ringbauer, Jr, Joseph A, and Wall, Judy D. Genes for Uranium Bioremediation in the Anaerobic Sulfate-Reducing Bacteria: Desulfovibrio mutants with altered sensitivity to oxidative stress. United States: N. p., 2006. Web.
Payne, Rayford B, Ringbauer, Jr, Joseph A, & Wall, Judy D. Genes for Uranium Bioremediation in the Anaerobic Sulfate-Reducing Bacteria: Desulfovibrio mutants with altered sensitivity to oxidative stress. United States.
Payne, Rayford B, Ringbauer, Jr, Joseph A, and Wall, Judy D. Wed . "Genes for Uranium Bioremediation in the Anaerobic Sulfate-Reducing Bacteria: Desulfovibrio mutants with altered sensitivity to oxidative stress". United States. https://www.osti.gov/servlets/purl/894936.
@article{osti_894936,
title = {Genes for Uranium Bioremediation in the Anaerobic Sulfate-Reducing Bacteria: Desulfovibrio mutants with altered sensitivity to oxidative stress},
author = {Payne, Rayford B and Ringbauer, Jr, Joseph A and Wall, Judy D},
abstractNote = {Sulfate-reducing bacteria of the genus Desulfovibrio are ubiquitous in anaerobic environments such as groundwater, sediments, and the gastrointestinal tract of animals. Because of the ability of Desulfovibrio to reduce radionuclides and metals through both enzymatic and chemical means, they have been proposed as a means to bioremediate heavy metal contaminated sites. Although classically thought of as strict anaerobes, Desulfovibrio species are surprisingly aerotolerant. Our objective is to understand the response of Desulfovibrio to oxidative stress so that we may more effectively utilize them in bioremediation of heavy metals in mixed aerobic-anaerobic environments. The enzymes superoxide dismutase, superoxide reductase, catalase, and rubrerythrin have been shown by others to be involved in the detoxification of reactive oxygen species in Desulfovibrio. Some members of the genus Desulfovibrio can even reduce molecular oxygen to water via a membrane bound electron transport chain with the concomitant production of ATP, although their ability to grow with oxygen as the sole electron acceptor is still questioned.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {4}
}

Conference:
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