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Ralstonia metallidurans, a bacterium specifically adapted to toxic metals: towards a catalogue of metal-responsive genes.
Mergeay, M.; Monchy, S.; Vallaeys, T. et al.
2003In FEMS Microbiology Reviews
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Abstract :
[en] Ralstonia metallidurans, formerly known as Alcaligenes eutrophus and thereafter as Ralstonia eutropha, is a beta-Proteobacterium colonizing industrial sediments, soils or wastes with a high content of heavy metals. The type strain CH34 carries two large plasmids (pMOL28 and pMOL30) bearing a variety of genes for metal resistance. A chronological overview describes the progress made in the knowledge of the plasmid-borne metal resistance mechanisms, the genetics of R. metallidurans CH34 and its taxonomy, and the applications of this strain in the fields of environmental remediation and microbial ecology. Recently, the sequence draft of the genome of R. metallidurans has become available. This allowed a comparison of these preliminary data with the published genome data of the plant pathogen Ralstonia solanacearum, which harbors a megaplasmid (of 2.1 Mb) carrying some metal resistance genes that are similar to those found in R. metallidurans CH34. In addition, a first inventory of metal resistance genes and operons across these two organisms could be made. This inventory, which partly relied on the use of proteomic approaches, revealed the presence of numerous loci not only on the large plasmids pMOL28 and pMOL30 but also on the chromosome. It suggests that metal-resistant Ralstonia, through evolution, are particularly well adapted to the harsh environments typically created by extreme anthropogenic situations or biotopes.
Disciplines :
Biochemistry, biophysics & molecular biology
Zoology
Author, co-author :
Mergeay, M.
Monchy, S.
Vallaeys, T.
Auquier, V.
Benotmane, A
Bertin, P
Taghavi, S.
Dunn, J.
van der Lelie, D.
Wattiez, Ruddy  
Language :
English
Title :
Ralstonia metallidurans, a bacterium specifically adapted to toxic metals: towards a catalogue of metal-responsive genes.
Publication date :
01 June 2003
Journal title :
FEMS Microbiology Reviews
ISSN :
0168-6445
eISSN :
1574-6976
Publisher :
Oxford University Press, United Kingdom
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S828 - Protéomie et Microbiologie
Available on ORBi UMONS :
since 14 January 2013

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