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Rôles des tétraspanines Tspan5 et Tspan15 dans le contrôle de l'endocytose et du niveau d'expression de la métalloprotéase ADAM10

Abstract : Tetraspanins are a family of proteins containing four-transmembrane domains that can interact with partners to include them in a dynamic network of interactions named tetraspanin web. Among them, the TspanC8 tetraspanin subfamily is known to share one partner, the ADAM10 metalloprotease.The ADAM10 protease is essential to development and is responsible for the shedding of a number of substrates, including the Notch receptor ectodomain, several cadherins and growth factors. ADAM10 is also implicated in the regulation of several pathologies including Alzheimer’s disease and carcinogenesis.Previous studies from our laboratory show that TspanC8 family members regulate the function of ADAM10 through its expression and its membrane compartmentalisation.Data presented in this thesis demonstrate that several TspanC8s also regulate ADAM10’s activity through differential stability and endocytosis, and explore the subjascent mechanisms. We also show that TspanC8 family members compete for association with ADAM10; thus, we bring elements of reflexion the use of tags and subsequent experimental bias.
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Etienne Eschenbrenner. Rôles des tétraspanines Tspan5 et Tspan15 dans le contrôle de l'endocytose et du niveau d'expression de la métalloprotéase ADAM10. Organisation et fonctions cellulaires [q-bio.SC]. Université Paris Saclay (COmUE), 2019. Français. ⟨NNT : 2019SACLS500⟩. ⟨tel-02442045⟩

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