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Formation and Cooperative Behaviour of Protein Complexes on the Cell Membrane [electronic resource] / by Ksenia Guseva.

By: Guseva, Ksenia [author.].
Contributor(s): SpringerLink (Online service).
Material type: materialTypeLabelBookSeries: Springer Theses: Publisher: Berlin, Heidelberg : Springer Berlin Heidelberg, 2012Description: XII, 80 p. online resource.Content type: text Media type: computer Carrier type: online resourceISBN: 9783642239885.Subject(s): Physics | Polymers | Cell membranes | Physics | Membranes | Membrane Biology | Statistical Physics, Dynamical Systems and Complexity | Polymer SciencesDDC classification: 571.64 Online resources: Click here to access online
Contents:
Introduction -- The Role of Fragmentation on the Formation of Homomeric Protein Complexes -- Collective Response of Self-organised Clusters of Mechanosensitive Channels -- Assembly and Fragmentation of Tat Pores -- Conclusion.
In: Springer eBooksSummary: With the aim of providing a deeper insight into possible mechanisms of biological self-organization, this thesis presents new approaches to describe the process of self-assembly and the impact of spatial organization on the function of membrane proteins, from a statistical physics point of view. It focuses on three important scenarios: the assembly of membrane proteins, the collective response of mechanosensitive channels and the function of the twin arginine translocation (Tat) system. Using methods from equilibrium and non-equilibrium statistical mechanics, general conclusions were drawn that demonstrate the importance of the protein-protein interactions. Namely, in the first part a general aggregation dynamics model is formulated, and used to show that fragmentation crucially affects the efficiency of the self-assembly process of proteins. In the second part, by mapping the membrane-mediated forces into a simplified many-body system, the dynamic and equilibrium behaviour of interacting mechanosensitive channels is derived, showing that protein agglomeration strongly impacts its desired function. The final part develops a model that incorporates both the agglomeration and transport function of the Tat system, thereby providing a comprehensive description of this self-organizing process.
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Introduction -- The Role of Fragmentation on the Formation of Homomeric Protein Complexes -- Collective Response of Self-organised Clusters of Mechanosensitive Channels -- Assembly and Fragmentation of Tat Pores -- Conclusion.

With the aim of providing a deeper insight into possible mechanisms of biological self-organization, this thesis presents new approaches to describe the process of self-assembly and the impact of spatial organization on the function of membrane proteins, from a statistical physics point of view. It focuses on three important scenarios: the assembly of membrane proteins, the collective response of mechanosensitive channels and the function of the twin arginine translocation (Tat) system. Using methods from equilibrium and non-equilibrium statistical mechanics, general conclusions were drawn that demonstrate the importance of the protein-protein interactions. Namely, in the first part a general aggregation dynamics model is formulated, and used to show that fragmentation crucially affects the efficiency of the self-assembly process of proteins. In the second part, by mapping the membrane-mediated forces into a simplified many-body system, the dynamic and equilibrium behaviour of interacting mechanosensitive channels is derived, showing that protein agglomeration strongly impacts its desired function. The final part develops a model that incorporates both the agglomeration and transport function of the Tat system, thereby providing a comprehensive description of this self-organizing process.

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