SufC: an unorthodox cytoplasmic ABC/ATPase required for [Fe-S] biogenesis under oxidative stress.
EMBO J
; 22(3): 427-37, 2003 Feb 03.
Article
em En
| MEDLINE
| ID: mdl-12554644
ABSTRACT
Proteins containing [Fe-S] clusters perform essential functions in all domains of life. Previously, we identified the sufABCDSE operon as being necessary for virulence of the plant pathogen Erwinia chrysanthemi. In addition, we collected preliminary evidence that the sufABCDSE operon might be involved in the assembly of [Fe-S] clusters. Of particular interest are the sufB, sufC and sufD genes, which are conserved among Eubacteria, Archaea, plants and parasites. The present study establishes SufC as an unorthodox ATPase of the ABC superfamily that is located in the cytosol, wherein it interacts with both SufB and SufD. Moreover, under oxidative stress conditions, SufC was found to be necessary for the activity of enzymes containing oxygen-labile [Fe-S] clusters, but dispensable for glutamate synthase, which contains an oxidatively stable [Fe-S] cluster. Lastly, we have shown SufBCD to be essential for iron acquisition via chrysobactin, a siderophore of major importance in virulence. We discuss a model wherein the SufBCD proteins contribute to bacterial pathogenicity via their role in the assembly of [Fe-S] clusters under oxidative stress and iron limitation.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Enxofre
/
Proteínas de Bactérias
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Adenosina Trifosfatases
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Estresse Oxidativo
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Ferro
/
Proteínas Ferro-Enxofre
Idioma:
En
Revista:
EMBO J
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
França