Role of the kinesin-like protein KipB in Aspergillus nidulans [Elektronische Ressource] / vorgelegt von Patricia Elena Rischitor

Rischito

Sujets

• Biologie

Informations

• Publié par: philipps-universitat_marburg
• Publié le: 01 janvier 2004
• Nombre de lectures: 22
• Langue: Deutsch
• Poids de l'ouvrage: 4 Mo

Extrait

Role of the Kinesin-like Protein KipB in
Aspergillus nidulans


Dissertation
zur
Erlangung des Doktorgrades
der Naturwissenschaften
(Dr. rer. nat.)




dem Fachbereich Biologie
der Philipps-Universität, Marburg/Lahn
vorgelegt von


Patricia Elena Rischitor
aus
Iasi / Rumänien




Marburg, Februar 2004 Vom Fachbereich Biologie der Philipps-Universität Marburg als Dissertation
angenommen am:


Erstgutachter: HD Dr. R. Fischer
Zweitgutachter: Prof. Dr. M. Bölker


Tag der mündlichen Prüfung: Die Untersuchungen zur vorliegenden Arbeit wurden von August 2000 bis Februar
2004 im Laboratorium für Mikrobiologie des Fachbereichs Biologie der Philipps-
Universität Marburg und am Max-Planck Institut für terrestrische Mikrobiologie in
Marburg unter der Leitung von Herrn von HD Dr. R. Fischer durchgeführt. Ich versichere, dass ich meine Dissertation mit dem Titel “Role of the Kinesin-like
Protein KipB in Aspergillus nidulans“ selbstständig, ohne unerlaubte Hilfe angefertigt
und mich dabei keiner anderen als der von mir ausdrücklich bezeichneten Quellen
und Hilfen bedient habe.

Die Dissertation wurde in der jetzigen oder einer ähnlichen Form noch bei keiner
anderen Hochschule eingereicht und hat noch keinen sonstigen Prüfungszwecken
gedient.



Marburg, 16. Februar 2004 Patricia Elena Rischitor
Im Zusammenhang mit der Thematik der vorliegenden Dissertation wurden bzw.
werden folgende Publikationen erstellt:
Rischitor E. P., Konzack S. and Fischer R. (2004). The Kip3-like kinesin KipB
moves along microtubules and determines spindle position during synchronized
mitoses in hyphae of Aspergillus nidulans. Eukaryotic Cell. In press

Konzack S., Rischitor E. P. and Fischer R. (2004). The kinesin motor KipA is
required for microtubule anchorage and maintenance of directionality of polar growth
in Aspergillus nidulans. Submitted

Toews W. M., Warmbold J., Konzack S., Rischitor E. P., Veith D., Vienken K.,
Vinuesa C., Wei H. and Fischer R. (2004). Establishment of mRFP1 as fluorescent
marker in Aspergillus nidulans and construction of expression vectors for high-
throughput protein tagging using recombination in vitro (GATEWAY). Current
Genetics. In press ”The most beautiful thing we can experience is the mysterious. It is the source of all
true art and science. He to whom this emotion is a stranger, who can no longer
pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed.”

Albert Einstein, in 'What I Believe' 1930 Content
Content
I. Summary...........................................................................................4
Zusammenfassung ........................................................6
Rezumat .................................8
II. Introduction ....................................................................................10
1. Cytoskeleton........................................................................................... 12
Microtubules ............................................................................................. 12
2. Motor protein superfamilies.................................................................. 14
3. Kinesins................................................................................................... 15
3.1. General structural features of kinesin motors .......................................... 16
3.2. Kinesin directionality and motility ............................................................. 17
3.3. Kinesin motors as molecular machines.................................................... 18
3.4. Cellular function of kinesins...................................................................... 19
3.5. Kip3 family of kinesins.............................................................................. 20
3.6. Kinesins in filamentous fungi.................................................................... 24
3.7. Kinesin-like proteins of Aspergillus nidulans............................................ 26
III. Materials and Methods ..................................................................28
1. Equipment and chemicals..................................................................... 28
2. Organisms used in this study and microbiological methods ........... 29
2.1. Organisms................................................................................................ 29
2.2. Cultivation and growing of microorganisms ............................................. 31
2.3. Growth conditions and storage of transformed E. coli and A. nidulans
strains ....................................................................................................... 32
2.4. Determination of spore viability ................................................................ 32
2.5. Induction of the alcA promoter ................................................................. 33
3. Genetic methods in A. nidulans ........................................................... 34
3.1. Crossing of A. nidulans ............................................................................ 34
3.2. Construction of A. nidulans diploid strains ............................................... 34
4. Molecular biological methods............................................................... 35
4.1. Plasmids and cosmids.............................................................................. 35
4.2. DNA manipulations................................................................................... 37
4.2.1. Plasmid DNA preparation from E. coli cells ...................................... 37
4.2.2. Genomic DNA preparation from A. nidulans..................................... 37
4.2.3. Digestion of DNA by restriction endonucleases................................ 38
4.2.4. Dephosphorylation of digested DNA................................................. 38
4.2.5. DNA precipitation..............................................................................38
4.2.6. DNA ligation......................................................................................39
4.2.7. DNA agarose gel electrophoresis .....................................................
4.2.8. PCR...................................................................................................39
4.2.9. Spore PCR........................................................................................41
4.2.10. DNA isolation from agarose gel ........................................................ 42
4.2.11. DNA sequencing...............................................................................42
4.2.12. Transformation of E. coli ................................................................... 42
1 Content
4.2.13. Transformation of A. nidulans ........................................................... 42
4.2.14. DNA-DNA hybridization (Southern blot analysis) ............................. 43
4.2.15. Colony hybridization..........................................................................44
4.3. RNA manipulations................................................................................... 44
4.3.1. Isolation of total RNA from A. nidulans ............................................. 44
4.3.2. DNA-RNA hybridization (Northern blot analysis).............................. 45
4.4. Description of DNA constructs (plasmids)................................................ 46
4.4.1. Cloning of the kipB gene................................................................... 46
4.4.2. ClonikipB disruption construct (pPR13)............................. 46
4.4.3. GFP labeling of KipB (pPR11; pPR38) ............................................. 46
4.4.4. mRFP1-labeling of KipB (pPND1)..................................................... 47
4.4.5. HA-labeling of KipB (pPR12) ............................................................ 47
5. Biochemical methods ............................................................................ 47
5.1. Isolation of protein from A. nidulans......................................................... 47
5.2. Determination of protein concentration (Bradford Assay)........................ 48
5.3. SDS-Polyacrylamide gel electrophoresis (SDS-PAGE)........................... 48
5.4. Western blotting........................................................................................ 49
6. Fluorescence microscopy, live-cell image acquisition
and analysis ................................................................................................... 50
IV. Results ............................................................................................51
1. Cloning of the kipB gene....................................................................... 51
2. Analysis of the protein sequence......................................................... 54
3. Molecular analysis of kipB functions................................................... 58
3.1. kipB disruption.......................................................................................... 58
3.2. Disruption of kipB affects microtubule stability..........................