Objective Within proteins, cysteine residues are sensitive to oxidation by reactive oxygen species (ROS). The first oxidation product of cysteines exposed to ROS is the sulfenic acid derivative (-SOH). Sulfenic acids are highly reactive intermediates that, unless they are stabilized within the protein microenvironment, react with another cysteine present in the vicinity to form a disulfide or are further oxidized to the irreversible sulfinic (-SO2H) and sulfonic (-SO3H) acid modifications. Sulfenic acid formation has traditionally been viewed as an unwanted reaction opening the way to damages that are harmful to proteins. However, it has become clear in recent years that formation of sulfenic acids is not always deleterious to the cell. A new concept is emerging, in which sulfenylation of specific cysteine residues modulates signal transduction pathways by altering the activity and function of cellular proteins, just as phosphorylation and dephosphorylation cycles regulate enzyme activities and cellular pathways. However, the modulation of protein function by sulfenic acid formation has been unambiguously shown for only a few proteins. We postulate that specific oxidation of cysteine residues via sulfenylation modulates the activity of many more proteins and pathways and that numerous sulfenylation sites have not yet been recognized. We want to apply an unprecedented multi-facetted approach to fully grasp the physiological scope of cysteine sulfenic acid formation by uncovering the sulfenome of a living organism, using Escherichia coli as a model. The main objectives of our research program are (1) to comprehensively characterize the sulfenome of E. coli, 2) to identify new proteins and pathways regulated by sulfenylation and (3) to understand how sulfenyla-tion is controlled at the cellular level. If our hypothesis proves to be true, our project will uncover a new “redox dimension” affecting many cellular processes and pathways, opening up new avenues of investigation. Fields of science natural scienceschemical scienceselectrochemistryelectrolysisnatural sciencesbiological sciencesbiochemistrybiomoleculesproteinsenzymes Programme(s) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Topic(s) ERC-SG-LS1 - ERC Starting Grant - Molecular and Structural Biology and Biochemistry Call for proposal ERC-2011-StG_20101109 See other projects for this call Funding Scheme ERC-SG - ERC Starting Grant Coordinator UNIVERSITE CATHOLIQUE DE LOUVAIN Address Place de l universite 1 1348 Louvain la neuve Belgium See on map Region Région wallonne Prov. Brabant Wallon Arr. Nivelles Activity type Higher or Secondary Education Establishments Administrative Contact Anne Bovy (Ms.) Principal investigator Jean-Francois Gaëtan Collet (Prof.) Links Contact the organisation Opens in new window Website Opens in new window EU contribution No data Beneficiaries (1) Sort alphabetically Sort by EU Contribution Expand all Collapse all UNIVERSITE CATHOLIQUE DE LOUVAIN Belgium EU contribution € 1 492 000,00 Address Place de l universite 1 1348 Louvain la neuve See on map Region Région wallonne Prov. Brabant Wallon Arr. Nivelles Activity type Higher or Secondary Education Establishments Administrative Contact Anne Bovy (Ms.) Principal investigator Jean-Francois Gaëtan Collet (Prof.) Links Contact the organisation Opens in new window Website Opens in new window Other funding No data
