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SULFENIC

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Unraveling the cellular sulfenome a search for new redox regulated pathways

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 int... ver más

31/10/2016

UCLouvain

1M€

Presupuesto del proyecto: 1M€

Líder del proyecto

UNIVERSITE CATHOLIQUE DE LOUVAIN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo FP7 notifico la concesión del proyecto el día 2016-10-31 No tenemos la información de la convocatoria

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UCLouvain

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Líder del proyecto

UNIVERSITE CATHOLIQUE DE LOUVAIN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 1M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto 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.

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