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Ekspresija in čiščenje rekombinatnega humanega importina ▫alfa 1 in alfa 3▫Golob, EvaImportin igra pomembno vlogo pri prenosu proteinov v celièno jedro. Prepoznava in veze specifièna zaporedja na proteinih, imenovana nuklearni lokalizacijski signali, ki jih nosijo proteini, namenjeni ... v jedro. Importinje lahko vpleten tudi v bolezenska stanja. Dokazali so njegovo vlogo vkancerogenezi, povezali pa so ga z razmnozevanjem virusov.V èloveskem organizmu obstaja veè izoform importina , ni pa se povsem znano, kaksne vlogeimajo posamezne izoforme. K boljsem razumevanju njihovega pomena bi pripomogle strukture teh izoform, ki pa se niso bile doloèene.Namen diplomske naloge je bil ekspresija in èisèenje dveh izoform humanega importina Č 1 in3. S tem bi pripravili podlago kasnejsi doloèitvi strukture teh dveh proteinov s kristalizacijo.Delo smo prièeli s transformacijo plazmidov v gostiteljske celice, saj nam je plazmide z vstavljeno kodirajoèo sekvenco za oba proteina odstopil laboratorij dr. KØhler-ja iz Nemèije. Zaporedjema so dodali histidinski podaljsek, ki olajsuje izolacijo zelenega proteina. Ekspresija je bila uspesna, a kolièina izrazenega proteina je bila majhna, priekspresiji importina 3 pa sta se pojavila dva proteina s histidinskim podaljskom. Mozen vzrok za te pojave je redka uporaba nekaterih kodonov s strani E. coli. Ekspresijo smo tako ponovili z uporabo posebnega plazmida, ki kodira doloèeno tRNA, ki sodeluje pri translaciji za E. coli redkih kodonov. Uporabili smo tudi druge celiène linije ter tip gojisèa. Ekspresija je bila uspesna, prav tako èisèenje. Proteina kljub temu ni bilo dovolj za kristalizacijo. V nadaljnjem delu bo potrebno povisati konèno koncentracijo proteina, saj je ta pomembna za uspesno doloèitev strukture.Type of material - undergr. thesis ; adult, seriousPublication and manufacture - Ljubljana : [Golob E.], 2001Language - slovenianCOBISS.SI-ID - 1025393
Author
Golob, Eva
Other authors
Štrukelj, Borut |
Kobe, Boštjan
Topics
importin alfa |
ekspresija humanega importina alfa |
transformacija |
afinitetna kromatografija |
tarčni proteini |
metodologija določanja |
izolacija |
struktura importina |
ultrafiltracija
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Library | Call number – location, accession no. ... | Copy status |
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Faculty of Pharmacy, Lj. | Knjižnica dp 577 Golob Eva Ekspresija IN: 0005764 |
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Database name | Field | Year |
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Štrukelj, Borut | 07849 |
Kobe, Boštjan | 12365 |
Source: Personal bibliographies
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