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Endogení elektrické pole a organizace živé hmoty
Pokorný, Jiří ; Hašek, Jiří ; Jelínek, František
Endogenous electromagnetic field with strong electric component generated by polar structures, in particular by microtubular structures, has important function in charge and mass transport which conditions biological activity. The Wiener-Lévy process is used for analysis of the transport with deterministic and random (thermal) components whose ratio may be important for biological function. Electric field can have dominant effect on directed transport at short and medium distances up to about 0.1 µm.
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Vyhledávání jaderného transportinu faktoru ISW1 remodelujícího chromatin u Saccharomyces cerevisiae
Strádalová, Vendula ; Hašek, Jiří ; Janatová, Ivana
Several intragenously-tagged versions of the ISW1 gene were constructed to follow Isw1p localization either in living (GFP-fusions) or in fixed cells (c-Myc-fusions). The whole set of available importin mutants was transformed with vectors carrying an intragenously-tagged ISW1 gene. In the strains where the importins Kap120p, Nmd5p, Sxm1p, Kap114p, Los1p, Msn5p, Kap123p and Pdr6 were deleted, the Isw1p-GFP fusion regulated by the ISW1 promoter was localized always in the nucleus. This suggests that none from these importins is required for nuclear localization of Isw1p. The localization of the Isw1p-GFP in the mtr10-1 strain differed from that observed in all the other analyzed importin mutants. Our results indicate that Mtr10p could be a good candidate for Isw1p importin.
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Rpg1p/eIF3a se spojuje s mitochondriemi v Saccharomyces cerevisiae
Hašek, Jiří ; Janatová, Ivana ; Špryngar, Martin ; Wolinski, H. ; Kohlwein, S. D.
RPG1/TIF32, the essential gene of Saccharomyces cerevisiae, encodes eIF3a subunit of the translation initiation factor 3. We show here that both temperature sensitive mutant of Rpg1 strongly differ in their distribution at permissive temperature, distribution of the Rpg1-1-GFP fusion is cytosolic, the fusion protein Rpg1-2-GFP was accumulated in large cytosolic aggregates. Using the life image analysis with confocal laser scanning microscope we found that these granules could be inherited to daughter cells and obviously associate with mitochondria.
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