The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.

Progress in understanding the mechanism underlying the enzymatic formation of iron-sulfur clusters is difficult since it involves a complex reaction and a multi-component system. By exploiting different spectroscopies, we characterize the effect on the enzymatic kinetics of cluster formation of CyaY...

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Autores principales: Clara Iannuzzi, Salvatore Adinolfi, Barry D Howes, Ricardo Garcia-Serres, Martin Clémancey, Jean-Marc Latour, Giulietta Smulevich, Annalisa Pastore
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Publicado: Public Library of Science (PLoS) 2011
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Acceso en línea:https://doaj.org/article/9c7c7a5b48d64bd99d6ea4af5b056c54
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spelling oai:doaj.org-article:9c7c7a5b48d64bd99d6ea4af5b056c542021-11-18T06:49:54ZThe role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.1932-620310.1371/journal.pone.0021992https://doaj.org/article/9c7c7a5b48d64bd99d6ea4af5b056c542011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21799759/?tool=EBIhttps://doaj.org/toc/1932-6203Progress in understanding the mechanism underlying the enzymatic formation of iron-sulfur clusters is difficult since it involves a complex reaction and a multi-component system. By exploiting different spectroscopies, we characterize the effect on the enzymatic kinetics of cluster formation of CyaY, the bacterial ortholog of frataxin, on cluster formation on the scaffold protein IscU. Frataxin/CyaY is a highly conserved protein implicated in an incurable ataxia in humans. Previous studies had suggested a role of CyaY as an inhibitor of iron sulfur cluster formation. Similar studies on the eukaryotic proteins have however suggested for frataxin a role as an activator. Our studies independently confirm that CyaY slows down the reaction and shed new light onto the mechanism by which CyaY works. We observe that the presence of CyaY does not alter the relative ratio between [2Fe2S](2+) and [4Fe4S](2+) but directly affects enzymatic activity.Clara IannuzziSalvatore AdinolfiBarry D HowesRicardo Garcia-SerresMartin ClémanceyJean-Marc LatourGiulietta SmulevichAnnalisa PastorePublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 7, p e21992 (2011)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Clara Iannuzzi
Salvatore Adinolfi
Barry D Howes
Ricardo Garcia-Serres
Martin Clémancey
Jean-Marc Latour
Giulietta Smulevich
Annalisa Pastore
The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.
description Progress in understanding the mechanism underlying the enzymatic formation of iron-sulfur clusters is difficult since it involves a complex reaction and a multi-component system. By exploiting different spectroscopies, we characterize the effect on the enzymatic kinetics of cluster formation of CyaY, the bacterial ortholog of frataxin, on cluster formation on the scaffold protein IscU. Frataxin/CyaY is a highly conserved protein implicated in an incurable ataxia in humans. Previous studies had suggested a role of CyaY as an inhibitor of iron sulfur cluster formation. Similar studies on the eukaryotic proteins have however suggested for frataxin a role as an activator. Our studies independently confirm that CyaY slows down the reaction and shed new light onto the mechanism by which CyaY works. We observe that the presence of CyaY does not alter the relative ratio between [2Fe2S](2+) and [4Fe4S](2+) but directly affects enzymatic activity.
format article
author Clara Iannuzzi
Salvatore Adinolfi
Barry D Howes
Ricardo Garcia-Serres
Martin Clémancey
Jean-Marc Latour
Giulietta Smulevich
Annalisa Pastore
author_facet Clara Iannuzzi
Salvatore Adinolfi
Barry D Howes
Ricardo Garcia-Serres
Martin Clémancey
Jean-Marc Latour
Giulietta Smulevich
Annalisa Pastore
author_sort Clara Iannuzzi
title The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.
title_short The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.
title_full The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.
title_fullStr The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.
title_full_unstemmed The role of CyaY in iron sulfur cluster assembly on the E. coli IscU scaffold protein.
title_sort role of cyay in iron sulfur cluster assembly on the e. coli iscu scaffold protein.
publisher Public Library of Science (PLoS)
publishDate 2011
url https://doaj.org/article/9c7c7a5b48d64bd99d6ea4af5b056c54
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