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Evolution and cellular function of monothiol glutaredoxins: involvement in iron-sulphur cluster assembly

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Issue date
2004
Author
Vilella Mitjana, Felipe
Alves, Rui
Rodríguez-Manzaneque Martínez, María Teresa
Bellí i Martínez, Gemma
Swaminathan, Swarna
Sunnerhagen, Per
Herrero Perpiñán, Enrique
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Vilella Mitjana, Felipe; Alves, Rui; Rodríguez-Manzaneque Martínez, María Teresa; Bellí i Martínez, Gemma; Swaminathan, Swarna; Sunnerhagen, Per; Herrero Perpiñán, Enrique; . (2004) . Evolution and cellular function of monothiol glutaredoxins: involvement in iron-sulphur cluster assembly. Comparative and Functional Genomics, 2004, vol. 5, núm. 4, p. 328-341. https://doi.org/10.1002/cfg.406.
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Abstract
A number of bacterial species, mostly proteobacteria, possess monothiol glutaredoxins homologous to the Saccharomyces cerevisiae mitochondrial protein Grx5, which is involved in iron–sulphur cluster synthesis. Phylogenetic profiling is used to predict that bacterial monothiol glutaredoxins also participate in the iron–sulphur cluster (ISC) assembly machinery, because their phylogenetic profiles are similar to the profiles of the bacterial homologues of yeast ISC proteins. High evolutionary cooccurrence is observed between the Grx5 homologues and the homologues of the Yah1 ferredoxin, the scaffold proteins Isa1 and Isa2, the frataxin protein Yfh1 and the Nfu1 protein. This suggests that a specific functional interaction exists between these ISC machinery proteins. Physical interaction analyses using low-definition protein docking predict the formation of strong and specific complexes between Grx5 and several components of the yeast ISC machinery. Two-hybrid analysis has confirmed the in vivo interaction between Grx5 and Isa1. Sequence comparison techniques and cladistics indicate that the other two monothiol glutaredoxins of S. cerevisiae, Grx3 and Grx4, have evolved from the fusion of a thioredoxin gene with a monothiol glutaredoxin gene early in the eukaryotic lineage, leading to differential functional specialization. While bacteria do not contain these chimaeric glutaredoxins, in many eukaryotic species Grx5 and Grx3/4-type monothiol glutaredoxins coexist in the cell.
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http://hdl.handle.net/10459.1/47216
DOI
https://doi.org/10.1002/cfg.406
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Comparative and Functional Genomics, 2004, vol. 5, núm. 4, p. 328-341
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