Search for dissertations about: "amphipathic helix"

Showing result 1 - 5 of 15 swedish dissertations containing the words amphipathic helix.

2. 1. Studies of protein structure, dynamics and protein-ligand interactions using NMR spectroscopy

   Author : Tobias Tengel; Göran Larsson; Maria Sunnerhagen; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; 19F NMR; 2S albumin; PapD; protein-ligand interaction; structure; TFE; Yersinia; YopD; allergy; amphipathic helix; Ber e 1; Brazil nut; dynamics; FimC; LcrH; NMR screening; Biophysics; Biofysik;

   Abstract : In the first part of the thesis, protein-ligand interactions were investigated using the chaperone LcrH, from Yersinia as target protein. The structure of a peptide encompassing the amphipathic domain (residue 278-300) of the protein YopD from Yersinia was determined by NMR in 40% TFE. READ MORE

4. 2. A computational approach to curvature sensing in lipid bilayers

   Author : Federico Elías-Wolff; Alexander Lyubartsev; Max Berkowitz; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; curvature sensing; membrane curvature; cardiolipin; amphipathic helix; symmetric multimers; lipid bilayer; molecular dynamics; Biophysics; biofysik;

   Abstract : Local curvature is a key driving force for spatial organization of cellular membranes, via a phenomenon known as membrane curvature sensing, where the binding energy of membrane associated macromolecules depends on the local membrane shape. However, the microscopic mechanisms of curvature sensing are not well understood. READ MORE

5. 3. A Chloroplast Localized Small Heat Shock Protein, Hsp21. Importance of Hsp21 in stress protection of transgenic Arabidopsis thaliana, recombinant expression and characterization of oxidation-dependent conformational changes

   Author : Ulrika Härndahl; Biokemi och Strukturbiologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; a-crystallin; sHsp; chaperone; amphipathic a-helix; oligomer; redox-regulated; methionine sulfoxidation; oxidative stress; regulation; protein structure; circular dichroism; mass spectrometry; fluorescence spectroscopy; Biochemistry; Metabolism; Biokemi;

   Abstract : A specific group of heat shock proteins, the so called small heat shock proteins (sHsps), exists in all organisms but are especially abundant in plants. The sHsps prevent aggregation of other proteins (substrate proteins) during transient heat and oxidative stress. READ MORE

6. 4. The conserved methionines in the chloroplast small heat shock protein - Role in chaperone-substrate interactions and effects of methionine sulfoxidation on chaperone activity

   Author : Niklas Gustavsson; Biokemi och Strukturbiologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Metabolism; Biochemistry; oxidative stress; thermostability; temperature stress; stress tolerance; sHsp; protein aggregation; molecular chaperone; Heat stress; methionine sulfoxidation; Biokemi; metabolism; Plant biochemistry; Växtbiokemi;

   Abstract : The chloroplast-localized small heat shock protein (sHsp) Hsp21 belongs to the family of alpha-crystallin like sHsps which form large oligomeric structures and protect partly unfolded aggregation-prone proteins against aggregation. The main focus for this thesis has been on the highly conserved methionines in Hsp21. READ MORE

7. 5. Biophysical studies of membrane associated peptides

   Author : Jesper Lind; Astrid Gräslund; Lena Mäler; Christian Griesinger; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NMR; spectroscopy; membrane interaction; bicelles; Chemistry; Kemi; Biophysics; biofysik;

   Abstract : A large part of the processes in living organisms involves proteins acting in a biological membrane. Biophysical studies on isolated model systems can give important understandings of the complicated biological mechanisms in the membrane. In this thesis peptide membrane interaction mechanisms are studied in several different systems. READ MORE