Sökning: "Protein–ligand interactions"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Protein–ligand interactions.

  1. 1. A first-principles approach to protein–ligand interaction

    Författare :Pär Söderhjelm; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; solvation; exchange repulsion; polarizable force fields; polarization; molecular mechanics; quantum chemistry; intermolecular interactions; protein–ligand interaction;

    Sammanfattning : It is still impossible to make an accurate, purely theoretical prediction of the free energy of a ligand binding to a protein in aqueous environment. The two main problems are the immense number of nuclear configurations contributing to the binding free energy and the impossibility to apply accurate quantum-chemical methods to such a large system, even for a single configuration. LÄS MER

  2. 2. Molecular recognition and dynamics in proteins studied by NMR

    Författare :Johan Wallerstein; Biofysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Chemical exchange; Conformational entropy; Entropy; Galectin-3; Isothermal Titration Calorimetry; ITC; Model-free formalism; Molecular recognition; Nuclear Magnetic Resonance; NMR; PGB1; Protein dynamics; Protein–ligand interactions; Proton-transfer reactions; Spin relaxation; Viscosity; Chemical exchange; Conformational entropy; Entropy; Galectin-3; Isothermal Titration Calorimetry; ITC; Model-free formalism; Molecular recognition; Nuclear Magnetic Resonance; NMR; PGB1; Protein dynamics; Protein–ligand interactions; Proton-transfer reactions; Spin relaxation; Viscosity;

    Sammanfattning : Knowledge of dynamics in protein is very important in the description of protein function and molecular recognition. The thesis investigates protein dynamics on time-scales from milli- to sub-nanosecond, with focus on the latter, using NMR spin relaxation experiments on two proteins, the 138-residue carbohydrate recognition domain of galectin-3 (Gal3C) and the 56-residue B1 domain of bacterial protein G (PGB1). LÄS MER

  3. 3. Accurate Force Fields for Spectroscopic Studies of Protein–Ligand Interactions and Self-Assembly Structures

    Författare :Yogesh Todarwal; Patrick Norman; Daniel Escudero; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular Dynamics Simulations; Force Field Parametrization; Density Functional Theory; Host-Guest Chemistry; Self-Assembly Systems; Neurodegenerative Diseases; Supramolecular Chemistry; Fluorescent Ligands; Oligothiophenes; Cyclonaphthodithiophene Diimides; Sulfonimidamide Organogelators; Helicenes.; Theoretical Chemistry and Biology; Teoretisk kemi och biologi;

    Sammanfattning : The computational prediction of complex molecular behaviors is an essen- tial component of modern chemistry, as it provides a faster and more cost- effective way to explore molecular interactions that may be difficult or even impossible to study experimentally. Molecular dynamics (MD) simulations of- ten serve as a valuable tool for such predictions; however, their accuracy is inherently dependent on the force field (FF) parameters employed. LÄS MER

  4. 4. Free-energy studies of ligand-binding affinities

    Författare :Vilhelm Ekberg; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; free energy perturbation; drug design; ligand-binding affinity; entropy; molecular mechanics; molecular dynamics;

    Sammanfattning : In drug discovery, it is of utmost importance to accurately calculate the free energies of binding ligands to various protein targets, such as enzymes and receptors. We have assessed and used computational tools for this aim, most of them based on molecular dynamics (MD) simulations. LÄS MER

  5. 5. Theoretical studies of protein-ligand binding

    Författare :Majda Misini Ignjatovic; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Protein-ligand binding; MD; GIST; GCMC; FEP; Solvation; Entropy; Water; QM MM-FEP; Protein-ligand binding; MD; GIST; GCMC; FEP; Solvation; Entropy; Water; QM MM-FEP;

    Sammanfattning : Understanding how drugs work is of great importance, since it can facilitate drug discovery, both time- and costwise. At the same time, it is important to have methods that can help predict how well does a potential drug molecule bind to its target. Computational methods can in many ways contribute to drug design process. LÄS MER