Siderophore production and facilitated uptake of iron plutonium in p. putida.

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Bioremediation is a very attractive alternative for restoration of contaminated soil and ground water . This is particularly true for radionuclide contamination, which tends to be low in concentration and distributed over large surface areas . Microorganisms, through their natural metabolism, produce a large variety of organic molecules of different size and functionality . These molecules interact with contaminants present in the microbe's environment . Through these interactions bio-molecules can solubilize, oxidize, reduce or precipitate major metal contaminant in soils and ground water . We are studying these interaction for actinides and common soil subsurface bacteria . One focus has ... continued below

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[5] p.

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Boukhalfa, H. (Hakim); Lack, J. G. (Joseph G.); Reilly, S. D. (Sean D.); Hersman, L. E. (Larry E.) & Neu, M. P. (Mary P.) January 1, 2003.

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Description

Bioremediation is a very attractive alternative for restoration of contaminated soil and ground water . This is particularly true for radionuclide contamination, which tends to be low in concentration and distributed over large surface areas . Microorganisms, through their natural metabolism, produce a large variety of organic molecules of different size and functionality . These molecules interact with contaminants present in the microbe's environment . Through these interactions bio-molecules can solubilize, oxidize, reduce or precipitate major metal contaminant in soils and ground water . We are studying these interaction for actinides and common soil subsurface bacteria . One focus has been on siderophores, small molecules that have great affinity for hard metal ions, and their potential to affect the distribution and mobility of actinide contaminants . The metal siderophores assembly can be recognized and taken up by micro-organisms through their interference with their iron uptake system . The first step in the active iron transport consists of Fe(III)-siderophore recognition by membrane receptors, which requires specific stereo orientation of the Fe(III)-siderophore complex . Recent investigations have shown that siderophores can form strong complexes with a large variety of toxic metals and may mediate their introduction inside the cell . We have previously shown that a Puhydroxamate siderophore assembly is recognized and taken up by the Microbacterium flavescens (JG-9). However, it is not clear if Pu-siderophore assemblies of other siderophores are also recognized.

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[5] p.

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  • Submitted to: Plutonium Futures Conference, July 6-10, Albuquerque, NM

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  • Report No.: LA-UR-03-0913
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976553
  • Archival Resource Key: ark:/67531/metadc930622

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  • January 1, 2003

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 4:48 p.m.

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Boukhalfa, H. (Hakim); Lack, J. G. (Joseph G.); Reilly, S. D. (Sean D.); Hersman, L. E. (Larry E.) & Neu, M. P. (Mary P.). Siderophore production and facilitated uptake of iron plutonium in p. putida., article, January 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc930622/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.