Academic literature on the topic 'Interactions ARN-protéine – Simulation par ordinateur'
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Dissertations / Theses on the topic "Interactions ARN-protéine – Simulation par ordinateur":
Betzi, Stéphane. "Inhibition des interactions protéine/protéine : application à la conception d'antiviraux." Aix-Marseille 1, 2008. http://www.theses.fr/2008AIX11008.
My thesis focused on the future of biomedical research. We have developed for this purpose a protocol allowing to speed-up the discovery of new bio-active molecules targeting the interactions between two proteins. Using this protocol that we call "2P2I approach", acronym of Protein/Protein Interaction Inhibition, we proposes to combine molecular modeling methods for small molecules screening (in silico screening) with experimental screening using in vitro and cellular assays. It permits to create and adapt a fast and efficient strategy to design bio-active compounds according the biological subject specificities (known structures, known inhibitors, directed mutagenesis data) and applicable in academic research programs. The manuscript describes how we applied the 2P2I approach to several research projects to design antiviral drugs as well as the modeling tools and strategies we developed
Moniot, Antoine. "Modélisation 3D de complexes ARN-protéine par assemblage combinatoire de fragments structuraux." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0339.
The characterization of RNA-protein complexes at the atomic scale allows us to better understand the biological functions of these complexes, and to define therapeutic targets to regulate the biological phenomena in which they participate. The aim of this thesis is to develop tools to predict the structure of a protein-RNA complex when a 3D structure of the protein is known as well as the secondary structure of the interacting RNA part. We focus on the case where RNA is mainly in single-stranded form (unpaired nucleotides), raising the difficulty of its flexibility.A docking method developed in the CAPSID team is based on the use of structural fragments of single-stranded RNA. The work of this thesis builds on this method to perform docking of RNA secondary structures. We first evaluated the contribution of a loop closure constraint for docking the single-stranded loop of a hairpin structure, and then addressed the docking of the double-stranded elements of these structures, paving the way for the assembly of the entire complex.This fragment-based docking method is dependent on the use of structural fragment libraries. These libraries are composed of prototypes that represent the conformational landscape experimentally observed in protein-bound RNA structures. A large part of the thesis work consisted in the creation and optimization of such fragment libraries.We created the ProtNAff tool that allows to extract subsets of structures from the PDB and to create libraries of nucleic acid fragments, following complex combinations of criteria. It has been designed to exceed our needs, so that it can be adopted by the community for the treatment of various problems.We have developed a new approach for inferring prototypes of a set of conformations. The set of prototypes must satisfy two contradictory constraints: to be representative (in the sense of the metric) and of cardinality as small as possible. The problem thus reduces to that of inferring an epsilon-network of minimal cardinality. We treat it in all its generality by discussing the spaces on which the data are defined. Our method is based on hierarchical agglomerative classification with as linkage the radius of the minimum balls enclosing the points of each subset. Applied to our libraries, this approach reduced their size by a factor of 4, and our docking computation time by the same amount, while improving their reliability.Finally, to overcome the problem posed by the pairwise superimposition of structures, we used a representation of the fragments in internal coordinates, allowing to reduce further the computation time for the creation of libraries
Sawmynaden, Jaysen. "Conception de peptide cyclique et étude de l'interaction protéine-protéine par des méthodes d'échantillonnage accélérée." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS389.
Proteins are molecules involved in biological function. Most of them interact with other protein. Disturb protein protein interactions has high potential in the development of new drugs. Cyclic peptides could be good candidat with a good specificity and target for their targets. Indeed cyclization stabilize and increase their resistance again protease. Make experimental experience to check their binding affinity can be complicated. In this thesis we present method to sample Cyclic peptides’s conformational landscape and predicted their binding affinity for their targets with enhanced sampling method
Saurabh, Suman. "Nature of Inter-biomolecular interaction and its consequences : protein, DNA and their Complexes." Thesis, Tours, 2017. http://www.theses.fr/2017TOUR4052/document.
The biological world is full of mysteries. The understanding of many extremely complex biological processes is greatly improved by the combination of approaches borrowed from different disciplines such as chemistry and more recently physics. Physics uses experimental tools such as optical tweezers and optical and electron microscopes to explore the microscopic mechanisms taking place in the cell. Knowledge of the nature of the interactions between biomolecules and the possibility of translating these interactions into equations allowed physics to construct models that are simple, but contain the ingredients sufficient to describe a specific mechanism. The numerical simulation of such models improves our understanding of the relationship between relevant molecular-scale mechanisms and experimental observations of biological phenomena. The structural organization of biomolecular complexes is a process that involves various scales of length and time
Chevrollier, Nicolas. "Développement et application d’une approche de docking par fragments pour modéliser les interactions entre protéines et ARN simple-brin." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS106/document.
RNA-protein interactions mediate numerous fundamental cellular processes. Atomic scale details of these interactions shed light on their functions but can also allow the rational design of ligands that could modulate them. NMR and X-ray crystallography are the 2 main techniques used to resolve 3D highresolution structures between two interacting molecules. Docking approaches can also be utilized to give models as an alternative. However, the application of these approaches to RNA-protein complexes is hampered by an issue. RNA-protein interactions often relies on the specific recognition of a short singlestranded RNA (ssRNA) sequence by the protein. The inherent flexibility of the ssRNA segment would impose, in a classical docking approach, to explore their resulting large conformation space which is not computationally reliable. The goal of this project is to overcome this barrier by using a fragment-based docking approach. This approach developed from some of the most represented RNA-binding domains showed excellent results in the prediction of the ssRNA-protein binding mode from the RNA sequence and also a great potential to predict preferential RNA binding sequences
Books on the topic "Interactions ARN-protéine – Simulation par ordinateur":
Nussinov, Ruth, and Gideon Schreiber. Computational Protein-Protein Interactions. Taylor & Francis Group, 2017.
Nussinov, Ruth, and Gideon Schreiber. Computational Protein-Protein Interactions. Taylor & Francis Group, 2009.
Nussinov, Ruth, and Gideon Schreiber. Computational Protein-Protein Interactions. Taylor & Francis Group, 2009.