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<dc:title xml:lang="fr">Développements méthodologiques et combinaisons d'approches de spectrométrie de masse structurale pour la caractérisation de complexes multi-protéiques</dc:title>
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<dc:subject xml:lang="fr">Spectrométrie de masse structurale</dc:subject>
<dc:subject xml:lang="fr">Échange hydrogène/deuterium</dc:subject>
<dc:subject xml:lang="fr">Pontage chimique</dc:subject>
<dc:subject xml:lang="fr">Spectrométrie de masse native</dc:subject>
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<dc:subject xml:lang="fr">Stratégies bio-informatiques</dc:subject>
<dc:subject xml:lang="en">Structural mass spectrometry</dc:subject>
<dc:subject xml:lang="en">Hydrogen/deuterium exchange</dc:subject>
<dc:subject xml:lang="en">Cross-linking</dc:subject>
<dc:subject xml:lang="en">Native mass spectrometry</dc:subject>
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<dcterms:abstract xml:lang="fr">Ce travail de thèse porte sur des développements et optimisations de méthodes de spectrométrie de masse (MS) structurale, le pontage chimique (XL) et l’échange H/D (HDX) suivi par MS, pour la caractérisation de différents systèmes protéiques. L’apport de la mobilité ionique en HDX-MS a notamment pu être déterminé et un protocole de XL-MS avec des agents pontants MS clivables a été mis en place au laboratoire. Les stratégies bio-informatiques du traitement des données des deux techniques ont été évaluées. Ces développements ont ensuite été appliqués à la caractérisation structurale de différents complexes protéiques impliquant des récepteurs nucléaires, des protéines membranaires, des protéines arginines méthyltransférase et enfin des assemblages impliquant des protéines AAA+. Des approches de MS native et de photométrie de masse ont également été employées dans le but de compléter les informations obtenues en HDX-MS et XL-MS.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This PhD thesis focuses on the development and optimisation of structural mass spectrometry (MS) methods for the characterisation of different protein systems. Two structural MS approaches were developed with chemical cross-linking (XL) and H/D exchange (HDX) followed by MS. In particular, the contribution of ion mobility in HDX-MS could be determined and an XL-MS protocol with cleavable MS cross-linker was set up in the laboratory. The bioinformatics strategies for data processing of both techniques were evaluated. These developments were then applied to the structural characterisation of different protein complexes with nuclear receptors, membrane proteins, arginine methyltransferase proteins and finally assemblies involving AAA+ proteins. Native MS and mass photometry approaches were also used to complement the information obtained in HDX-MS and XL-MS.</dcterms:abstract>
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