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Publié par | ludwig-maximilians-universitat_munchen |
Publié le | 01 janvier 2008 |
Nombre de lectures | 24 |
Langue | English |
Poids de l'ouvrage | 10 Mo |
Extrait
Dissertation zur Erlangung des Doktorgrades der Fakultät für
Chemie und Pharmazie der LudwigMaximilians Universität München
Structural b asis o f t he m itochondrial
v oltagedependent a nion c hannel V DAC I
Thomas M eins
aus München
2008Erklärung
Diese Dissertation wurde im Sinne von §13 Abs. 3 bzw. 4 der Promotionsordnung vom
29. Januar 1998 von Herrn Prof. Dr. Dieter Oesterhelt betreut.
Ehrenwörtliche Versicherung
Diese Dissertation wurde selbstständig, ohne unerlaubte Hilfe erarbeitet.
München, am 08. September 2008
…………………………….
Thomas Meins
Dissertation eingereicht am: 08.09.2008
1. Gutachter: Prof. Dr. Dieter Oesterhelt
2. Gutachter: Prof. Dr. Karl-Peter Hopfner
Mündliche Prüfung am: 27.10.2008 Meinen Eltern & VerenaTABLE OF CONTENTS
1 Summary..................................................................................................................................................6
2 Introduction...............................................................................................................................................7
2.1 Mitochondrial structure and function.................................................................................................7
2.2 The mitochondrial outer membrane .................................................................................................8
2.3 The voltage dependent anion channel..............................................................................................8
2.3.1 General function of VDAC........................................................................................................9
2.3.2 The different isoforms of the VDAC........................................................................................10
2.3.3 Conductance, voltage dependency and ion selectivity of the VDAC......................................10
2.3.4 The general structure of the VDAC........................................................................................12
2.3.5 Fold and architecture of bacterial barrel membrane proteins .............................................15
2.3.6 Evidence for a barrel fold of VDAC ....................................................................................16
2.3.7 Model of the proposed VDAC structure and its gating mechanism........................................17
2.3.8 The role of VDAC in mitochondrial complexes.......................................................................19
2.3.8.1 Involvement of VDAC in complexes of the energy metabolism......................................20
2.3.8.2 Involvement of VDAC in the mitochondrial phase of apoptosis......................................20
2.4 Conceptual formulation...................................................................................................................22
3 Materials and methods............................................................................................................................24
3.1 Materials..........................................................................................................................................24
3.1.1 General Instruments:..............................................................................................................24
3.1.2 Consumables.........................................................................................................................24
3.1.3 Kit systems.............................................................................................................................25
3.1.4 Fine Chemicals.......................................................................................................................25
3.2 Strains and vectors ........................................................................................................................26
3.2.1 Strains....................................................................................................................................26
3.2.2 Vectors...................................................................................................................................26
3.3 Growth Media.................................................................................................................................26
3.3.1 Antibiotics...............................................................................................................................26
3.3.2 LB agar plates........................................................................................................................27
3.3.3 LB broth.................................................................................................................................27
3.3.4 TB broth.................................................................................................................................27
3.3.5 Minimal medium.....................................................................................................................27
3.3.6 Algal extract supplemented media (AES media) ...................................................................28TABLE OF CONTENTS
3.4 General Molecular Biological Techniques.......................................................................................29
3.4.1 Preparation of electrocompetent E. coli cells........................................................................29
3.4.2 Transformation of E. coli cells................................................................................................30
3.4.3 Determination of DNA concentrations....................................................................................30
3.4.4 Plasmid amplification ............................................................................................................30
3.4.5 Isolation of plasmid DNA from E. coli cells.............................................................................31
3.4.6 Analysis of plasmid DNA by agarose gel electrophoresis......................................................31
3.4.7 Sequencing of PDS56/RBSIIVDACIHis................................................................................31
3.4.8 Site directed mutagenesis of HVDAC1 .................................................................................32
3.4.9 Preparation of E. coli DL39 [prep4]........................................................................................34
3.5 Protein expression and purification.................................................................................................34
3.5.1 Heterologous expression of HVDAC1 in E. coli......................................................................34
3.5.1.1 Overproduction of HVDAC1 in E. coli M15 [prep4].........................................................34
3.5.1.2 Overproduction of selenomethionine labelled HVDAC1 in E. coli M15 [prep4]..............34
2 15 13 3.5.1.3 Overproduction of H, N and C labelled HVDAC1 in E. coli M15 [prep4]..................34
3.5.1.4 Overproduction of selective amino acid labelled HVDAC1 E. coli in DL39 [prep4]........35
3.5.2 Purification and refolding of HVDAC1 inclusion bodies..........................................................35
3.5.2.1 Purification of HVDAC1 inclusion bodies......................................................................35
3.5.2.2 Refolding of denatured HVDAC1..................................................................................36
3.5.3 Purification of refolded HVDAC1 for NMR investigations............................................