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<dc:title xml:lang="fr">Conception, synthèse et vectorisation d'inhibiteurs potentiels de la protéine bactérienne TonB</dc:title>
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<dc:subject xml:lang="fr">Bioterrorisme</dc:subject>
<dc:subject xml:lang="fr">Antibiotique</dc:subject>
<dc:subject xml:lang="fr">TonB</dc:subject>
<dc:subject xml:lang="fr">Inhibiteurs d’interaction protéine-protéine</dc:subject>
<dc:subject xml:lang="fr">Peptides</dc:subject>
<dc:subject xml:lang="fr">Isoindole</dc:subject>
<dc:subject xml:lang="fr">Triazine</dc:subject>
<dc:subject xml:lang="fr">Résonance plasmonique de surface</dc:subject>
<dc:subject xml:lang="fr">Pyochéline</dc:subject>
<dc:subject xml:lang="fr">Stratégie du Cheval de Troie</dc:subject>
<dc:subject xml:lang="en">Bioterrorism</dc:subject>
<dc:subject xml:lang="en">Antibiotics</dc:subject>
<dc:subject xml:lang="en">TonB</dc:subject>
<dc:subject xml:lang="en">Protein-protein interaction inhibitors</dc:subject>
<dc:subject xml:lang="en">Peptides</dc:subject>
<dc:subject xml:lang="en">Isoindole</dc:subject>
<dc:subject xml:lang="en">Triazine</dc:subject>
<dc:subject xml:lang="en">Surface plasmon resonance</dc:subject>
<dc:subject xml:lang="en">Pyochelin</dc:subject>
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<tef:elementdEntree autoriteExterne="031452809" autoriteSource="Sudoc">Chimie bioorganique</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="028584708" autoriteSource="Sudoc">Bactéries Gram négatives</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="033565783" autoriteSource="Sudoc">Complexes récepteur-ligand</tef:elementdEntree>
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<tef:vedetteRameauNomCommun>
<tef:elementdEntree autoriteExterne="125186037" autoriteSource="Sudoc">Résonance plasmonique de surface</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">La multiplication des résistances aux antibiothérapies actuelles et l’utilisation potentielle de bactéries pathogènes dans le cadre d’attentats bioterroristes rendent nécessaire la recherche de nouvelles cibles biologiques et la découverte de nouvelles stratégies antibiotiques. Dans ce contexte, les mécanismes d’assimilation du fer chez les bactéries à Gram négatif sont des cibles particulièrement prometteuses. Le fer est en effet un élément essentiel à la vie, mais peu biodisponible. Les bactéries ont donc développé des mécanismes efficaces pour subvenir à leurs besoins en fer. Ces mécanismes de transport nécessitent un apport d’énergie fourni par une machinerie bactérienne complexe, la machinerie TonB. La protéine TonB, qui joue un rôle central dans le fonctionnement de cette machinerie, est la cible de notre approche. Nous souhaitons séquestrer cette protéine dans le périplasme grâce à des composés peptidiques fonctionnalisés par des hétérocycles de type isoindole ou 1,2,4-triazine. La conception et la synthèse de ces molécules sont présentées dans ce manuscrit, ainsi que leurs perspectives de vectorisation en utilisant une stratégie dite du "cheval de Troie". Notre contribution à la mise au point d’un test d’affinité in vitro est également abordée.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The increasing resistances to the current antibiotherapies, and the potential use of pathogenic bacteria as biological weapons led us to the absolute necessity of discovering new biological targets and new antibiotic strategies. In this context, iron uptake pathways of Gram negative bacteria are promising targets. Indeed, iron is an essential nutrient, but it has a low bioavailability. Bacteria have developed efficient iron uptake pathways in order to proliferate. Iron is transported in the bacterial cell by specific outer membrane transporters and thanks to the energy provided by a complex molecular machinery, called TonB. The TonB protein, which is the keystone of this machinery, is a key target for the development of new antibiotics. We would like to sequester this protein in the periplasm thanks to molecules constituted of a peptidic moiety and a heterocyclic moiety such as isoindole or 1,2,4-triazine. The conception and the synthesis of these compounds are presented in this document, as well as their possibilities to be vectorized using a “Trojan Horse” strategy. Our contribution to the development of an in vitro test of affinity is presented as well.</dcterms:abstract>
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