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<dc:title xml:lang="fr">Vers des protocoles innovants en pontage chimique suivi par spectrométrie de masse (XL-MS) pour l’étude des interactions protéiques in-vitro et in-situ</dc:title>
<dcterms:alternative xml:lang="en">Towards innovative cross-linking mass spectrometry (XL-MS) workflows to decipher protein-protein interactions in vitro and in situ</dcterms:alternative>
<dc:subject xml:lang="fr">Spectrométrie de masse structurale</dc:subject>
<dc:subject xml:lang="fr">Pontage chimique suivi par spectrométrie de masse</dc:subject>
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<dc:subject xml:lang="en">Structural mass spectrometry</dc:subject>
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<dcterms:abstract xml:lang="fr">Cette thèse présente des développements méthodologiques en pontage chimique couplé à la spectrométrie de masse (XL-MS) pour l’étude des interactions protéines-protéines. Une approche innovante de photométrie de masse dénaturante a d’abord été mise au point pour suivre les réactions de pontage. L’automatisation de la préparation des échantillons et l’usage du réactif enrichissable PhoX ont ensuite permis l’analyse de conformations peu abondantes. Une méthode de fractionnement en phase gazeuse basée sur la mobilité ionique FAIMS a été développée, atteignant des performances proches de l’enrichissement en solution. Ces différentes avancées ont été appliquées à l’étude structurale des complexes RuvBL1-RuvBL2 (R1R2) dans un cadre collaboratif international incluant R1R2-SPAG1-PIH1D2, R1R2-SHQ1-DKC1 et R1R2-NONO. Enfin, l’application du XL-MS a été étendue aux protéomes entiers et in-vivo grâce au développement d’un fractionnement automatisé en solution et l’extension de notre approche FAIMS.</dcterms:abstract>
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